https://reprap.org/mediawiki/api.php?action=feedcontributions&user=Zemciko&feedformat=atomRepRap - User contributions [en]2024-03-28T12:55:22ZUser contributionsMediaWiki 1.30.0https://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=129671ZemcikO AL table2014-07-15T09:35:16Z<p>Zemciko: /* Wiring */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
working (1 month tested wo problems)<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
'''Serial wiring with Industrial power supply'''<br />
<br />
After another year of service and with new experieance i have finally switched to serial wiring. Just now im using 2W 0R1 wired resistors (wired resistors instead of methal oxide ones). They are 0,5mm larger in diameter and cost 3x more. ( 4,5Euro).<br />
Metal oxide resistors tend to lower its resistance (-40%) after first heating and after 6-9months copmpletely broke (in paralel wiring all resistors broke at the same time...).<br />
And i have found chaeper thermal expoxy glue (10euro for 5g) sold by computer stores called "ARCTIC ALUMINA AATA-5G ceramic Thermal Epoxy".<br />
<br />
<gallery><br />
File:Zapojeni_seriove.jpg<br />
File:Zapojeni_seriove_foto.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
Thermistor is glued to AL table with small, 3mm thick, AL block 10*10mm, wrapped with kapton tape. U just need to make small 1mm groove in it.<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Reprap_sinuhed_heated_AL_bed_v2.zip]] Step format of zemciko AL heated bed, complete assembly..<br />
<br />
[[File:Topna_telesa_na_desce_stolu.pdf]] Position of heat elements on zemciko Al heat bed. 250mm version.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== FEM ==<br />
<br />
FE Analysys done in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:Prusadeska-110na22-po510s.jpg<br />
File:Aldeska-110na22-po17s.jpg<br />
<br />
The tests clearly showed a better distribution of heat throu the heated table.<br />
<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....<br />
If u have any qurstions or ideas, contact me at zemciko@email.cz .</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=129670ZemcikO AL table2014-07-15T09:33:25Z<p>Zemciko: </p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
working (1 month tested wo problems)<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
'''Serial wiring with Industrial power supply'''<br />
<br />
After another year of service and with new experieance i have finally switched to serial wiring. Just now im using 2W wired resistors (wired resistors instead of methal oxide ones). They are 0,5mm larger in diameter and cost 3x more. ( 4,5Euro).<br />
Metal oxide resistors tend to lower its resistance (-40%) after first heating and after 6-9months copmpletely broke (in paralel wiring all resistors broke at the same time...).<br />
And i have found chaeper thermal expoxy glue (10euro for 5g) sold by computer stores called "ARCTIC ALUMINA AATA-5G ceramic Thermal Epoxy".<br />
<br />
<gallery><br />
File:Zapojeni_seriove.jpg<br />
File:Zapojeni_seriove_foto.jpg<br />
</gallery><br />
<br />
<br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
Thermistor is glued to AL table with small, 3mm thick, AL block 10*10mm, wrapped with kapton tape. U just need to make small 1mm groove in it.<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Reprap_sinuhed_heated_AL_bed_v2.zip]] Step format of zemciko AL heated bed, complete assembly..<br />
<br />
[[File:Topna_telesa_na_desce_stolu.pdf]] Position of heat elements on zemciko Al heat bed. 250mm version.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== FEM ==<br />
<br />
FE Analysys done in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:Prusadeska-110na22-po510s.jpg<br />
File:Aldeska-110na22-po17s.jpg<br />
<br />
The tests clearly showed a better distribution of heat throu the heated table.<br />
<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....<br />
If u have any qurstions or ideas, contact me at zemciko@email.cz .</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=129669ZemcikO AL table2014-07-15T09:31:54Z<p>Zemciko: </p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
working (1 month tested wo problems)<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
'''Serial wiring with Industrial power supply'''<br />
After another year of service and with new experieance i have finally switched to serial wiring. Just now im using 2W wired resistors (wired resistors instead of methal oxide ones). They are 0,5mm larger in diameter and cost 3x more. ( 4,5Euro).<br />
Metal oxide resistors tend to lower its resistance (-40%) after first heating and after 6-9months copmpletely broke (in paralel wiring all resistors broke at the same time...).<br />
And i have found chaeper thermal expoxy glue (10euro for 5g) sold by computer stores called "ARCTIC ALUMINA AATA-5G ceramic Thermal Epoxy".<br />
<br />
<gallery><br />
File:Zapojeni_seriove.jpg<br />
File:Zapojeni_seriove_foto.jpg<br />
</gallery><br />
<br />
<br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
Thermistor is glued to AL table with small, 3mm thick, AL block 10*10mm, wrapped with kapton tape. U just need to make small 1mm groove in it.<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Reprap_sinuhed_heated_AL_bed_v2.zip]] Step format of zemciko AL heated bed, complete assembly..<br />
<br />
[[File:Topna_telesa_na_desce_stolu.pdf]] Position of heat elements on zemciko Al heat bed. 250mm version.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== FEM ==<br />
<br />
FE Analysys done in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:Prusadeska-110na22-po510s.jpg<br />
File:Aldeska-110na22-po17s.jpg<br />
<br />
The tests clearly showed a better distribution of heat throu the heated table.<br />
<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....<br />
If u have any qurstions or ideas, contact me at zemciko@email.cz .</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Zapojeni_seriove_foto.jpg&diff=129668File:Zapojeni seriove foto.jpg2014-07-15T09:31:14Z<p>Zemciko: Serial wiring aplied on zemciko al table.</p>
<hr />
<div>Serial wiring aplied on zemciko al table.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=129667ZemcikO AL table2014-07-15T09:27:00Z<p>Zemciko: </p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
working (1 month tested wo problems)<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
'''Serial wiring with Industrial power supply'''<br />
After another year of service and with new experieance i have finally switched to serial wiring. Just now im using 2W wired resistors (wired resistors instead of methal oxide ones). They are 0,5mm larger in diameter and cost 3x more. ( 4,5Euro).<br />
Metal oxide resistors tend to lower its resistance (-40%) after first heating and after 6-9months copmpletely broke (in paralel wiring all resistors broke at the same time...).<br />
And i have found chaeper thermal expoxy glue (10euro for 5g) sold by computer stores called "ARCTIC ALUMINA AATA-5G ceramic Thermal Epoxy".<br />
<br />
<gallery><br />
File:Zapojeni_seriove.jpg<br />
</gallery><br />
<br />
<br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
Thermistor is glued to AL table with small, 3mm thick, AL block 10*10mm, wrapped with kapton tape. U just need to make small 1mm groove in it.<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Reprap_sinuhed_heated_AL_bed_v2.zip]] Step format of zemciko AL heated bed, complete assembly..<br />
<br />
[[File:Topna_telesa_na_desce_stolu.pdf]] Position of heat elements on zemciko Al heat bed. 250mm version.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== FEM ==<br />
<br />
FE Analysys done in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:Prusadeska-110na22-po510s.jpg<br />
File:Aldeska-110na22-po17s.jpg<br />
<br />
The tests clearly showed a better distribution of heat throu the heated table.<br />
<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....<br />
If u have any qurstions or ideas, contact me at zemciko@email.cz .</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Zapojeni_seriove.jpg&diff=129666File:Zapojeni seriove.jpg2014-07-15T09:09:01Z<p>Zemciko: Serial wiring for zemciko AL heated table.</p>
<hr />
<div>Serial wiring for zemciko AL heated table.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107545ZemcikO AL table2013-10-04T14:57:11Z<p>Zemciko: /* FEM */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
working (1 month tested wo problems)<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
Thermistor is glued to AL table with small, 3mm thick, AL block 10*10mm, wrapped with kapton tape. U just need to make small 1mm groove in it.<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Reprap_sinuhed_heated_AL_bed_v2.zip]] Step format of zemciko AL heated bed, complete assembly..<br />
<br />
[[File:Topna_telesa_na_desce_stolu.pdf]] Position of heat elements on zemciko Al heat bed. 250mm version.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== FEM ==<br />
<br />
FE Analysys done in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:Prusadeska-110na22-po510s.jpg<br />
File:Aldeska-110na22-po17s.jpg<br />
<br />
The tests clearly showed a better distribution of heat throu the heated table.<br />
<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....<br />
If u have any qurstions or ideas, contact me at zemciko@email.cz .</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107544ZemcikO AL table2013-10-04T14:53:55Z<p>Zemciko: /* Al table */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
working (1 month tested wo problems)<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
Thermistor is glued to AL table with small, 3mm thick, AL block 10*10mm, wrapped with kapton tape. U just need to make small 1mm groove in it.<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Reprap_sinuhed_heated_AL_bed_v2.zip]] Step format of zemciko AL heated bed, complete assembly..<br />
<br />
[[File:Topna_telesa_na_desce_stolu.pdf]] Position of heat elements on zemciko Al heat bed. 250mm version.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== FEM ==<br />
<br />
FE Analysys done in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:Prusadeska-110na22-po510s.jpg<br />
File:Aldeska-110na22-po17s.jpg<br />
<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....<br />
If u have any qurstions or ideas, contact me at zemciko@email.cz .</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107543ZemcikO AL table2013-10-04T14:45:26Z<p>Zemciko: /* FEM */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
working (1 month tested wo problems)<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Reprap_sinuhed_heated_AL_bed_v2.zip]] Step format of zemciko AL heated bed, complete assembly..<br />
<br />
[[File:Topna_telesa_na_desce_stolu.pdf]] Position of heat elements on zemciko Al heat bed. 250mm version.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== FEM ==<br />
<br />
FE Analysys done in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:Prusadeska-110na22-po510s.jpg<br />
File:Aldeska-110na22-po17s.jpg<br />
<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....<br />
If u have any qurstions or ideas, contact me at zemciko@email.cz .</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Aldeska-110na22-po17s.jpg&diff=107542File:Aldeska-110na22-po17s.jpg2013-10-04T14:45:04Z<p>Zemciko: Ansys thermal simulation zemciko 3mm Al plate.</p>
<hr />
<div>Ansys thermal simulation zemciko 3mm Al plate.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Prusadeska-110na22-po510s.jpg&diff=107541File:Prusadeska-110na22-po510s.jpg2013-10-04T14:43:33Z<p>Zemciko: Ansys thermal simulation Prusa MK1.</p>
<hr />
<div>Ansys thermal simulation Prusa MK1.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107540ZemcikO AL table2013-10-04T14:23:50Z<p>Zemciko: /* Another models and drawings */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
working (1 month tested wo problems)<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Reprap_sinuhed_heated_AL_bed_v2.zip]] Step format of zemciko AL heated bed, complete assembly..<br />
<br />
[[File:Topna_telesa_na_desce_stolu.pdf]] Position of heat elements on zemciko Al heat bed. 250mm version.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''FEM'' ==<br />
<br />
FE Analysys done in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....<br />
If u have any qurstions or ideas, contact me at zemciko@email.cz .</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Topna_telesa_na_desce_stolu.pdf&diff=107539File:Topna telesa na desce stolu.pdf2013-10-04T14:22:57Z<p>Zemciko: Position of heat elements on zemciko Al heat bed. 250mm version.</p>
<hr />
<div>Position of heat elements on zemciko Al heat bed. 250mm version.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107520ZemcikO AL table2013-10-04T11:38:20Z<p>Zemciko: /* TODO */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
working (1 month tested wo problems)<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Reprap_sinuhed_heated_AL_bed_v2.zip]] Step format of zemciko AL heated bed, complete assembly..<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''FEM'' ==<br />
<br />
FE Analysys done in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....<br />
If u have any qurstions or ideas, contact me at zemciko@email.cz .</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107519ZemcikO AL table2013-10-04T11:36:54Z<p>Zemciko: /* TODO */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
working (1 month tested wo problems)<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Reprap_sinuhed_heated_AL_bed_v2.zip]] Step format of zemciko AL heated bed, complete assembly..<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''FEM'' ==<br />
<br />
FE Analysys done in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107518ZemcikO AL table2013-10-04T11:34:51Z<p>Zemciko: /* Another models and drawings */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
working (1 month tested wo problems)<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Reprap_sinuhed_heated_AL_bed_v2.zip]] Step format of zemciko AL heated bed, complete assembly..<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
FE Analysys done in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Reprap_sinuhed_heated_AL_bed_v2.zip&diff=107517File:Reprap sinuhed heated AL bed v2.zip2013-10-04T11:33:32Z<p>Zemciko: Step format of zemciko AL heated bed, complete assembly.</p>
<hr />
<div>Step format of zemciko AL heated bed, complete assembly.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107511ZemcikO AL table2013-10-04T08:42:33Z<p>Zemciko: /* TODO */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
working (1 month tested wo problems)<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
FE Analysys done in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107510ZemcikO AL table2013-10-04T08:42:09Z<p>Zemciko: /* Aluminum heated table for REPRAP sinuhed or mendel clone */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
working (1 month tested wo problems)<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
FE Analysys dony in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107509ZemcikO AL table2013-10-04T08:41:12Z<p>Zemciko: </p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:'''<br />
<br />
working (1 month tested wo problems).<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
FE Analysys dony in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107508ZemcikO AL table2013-10-04T08:40:14Z<p>Zemciko: </p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = working<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my Al heated bed from 250*250*3mm AL plate.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
FE Analysys dony in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107507ZemcikO AL table2013-10-04T08:38:27Z<p>Zemciko: </p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
FE Analysys dony in ansys.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107506ZemcikO AL table2013-10-04T08:35:33Z<p>Zemciko: /* TODO */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
Heated Al bed works perfectly. i can see nice upgrade from pcb prusa MK1 table, next step is heated chamber....</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107273ZemcikO AL table2013-09-30T10:25:33Z<p>Zemciko: /* Improvements */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
<br />
'''energy chains'''<br />
<br />
Testing.<br />
<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107272ZemcikO AL table2013-09-30T10:25:11Z<p>Zemciko: /* Another models and drawings */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
'''energy chains'''<br />
Testing.<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107271ZemcikO AL table2013-09-30T10:24:55Z<p>Zemciko: /* Models and drawings */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
'''energy chains'''<br />
Testing.<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Another models and drawings ==<br />
<br />
'''Al table'''<br />
<br />
[[File:Ptfe_dily_01.pdf]] Machined parts of ZemcikO Al table.<br />
[[File:Al_dily_02.pdf]] Machined parts of ZemcikO Al table.<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Al_dily_02.pdf&diff=107270File:Al dily 02.pdf2013-09-30T10:24:33Z<p>Zemciko: Machined parts of ZemcikO Al table.</p>
<hr />
<div>Machined parts of ZemcikO Al table.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Ptfe_dily_01.pdf&diff=107269File:Ptfe dily 01.pdf2013-09-30T10:23:41Z<p>Zemciko: Machined parts of ZemcikO Al table.</p>
<hr />
<div>Machined parts of ZemcikO Al table.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107266ZemcikO AL table2013-09-30T09:50:53Z<p>Zemciko: </p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
'''energy chains'''<br />
Testing.<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
<gallery><br />
File:DSC_0313_stul_na_tiskarne_3.jpg<br />
</gallery><br />
<br />
== Models and drawings ==<br />
'''Al table'''<br />
<br />
[[File:STLspool.zip]] STL files of printed parts of ZemcikO Al table.<br />
<br />
<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:DSC_0313_stul_na_tiskarne_3.jpg&diff=107265File:DSC 0313 stul na tiskarne 3.jpg2013-09-30T09:49:57Z<p>Zemciko: Complete reprap sinuhed with AL heated bed and printed energy chains.</p>
<hr />
<div>Complete reprap sinuhed with AL heated bed and printed energy chains.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107264ZemcikO AL table2013-09-30T09:48:46Z<p>Zemciko: /* Improvements */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
'''energy chains'''<br />
Testing.<br />
As u can see in photos, im using my own energy chains design for wirings to Al table (and x axis). They are working perfectly and i plan to publish this design independently.<br />
<br />
== Models and drawings ==<br />
'''Al table'''<br />
<br />
[[File:STLspool.zip]] STL files of printed parts of ZemcikO Al table.<br />
<br />
<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107263ZemcikO AL table2013-09-30T09:44:22Z<p>Zemciko: /* Al table */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
Heating elements are bonded to the aluminum plate by epoxy adhesive with high thermal conductivity. It cost 20-30 Euro for 2-3 Al tables, but i think its worth of its price.<br />
<br />
<gallery><br />
File:DSC_0038_AL_stul_s_telesy2.jpg<br />
</gallery><br />
<br />
There are resistors with integrated ceramic housing. Maybe it can be glued directly, but remember very different thermal expansion value of ceramic and aluminium...<br />
<br />
== Improvements ==<br />
'''energy chains'''<br />
Testing.<br />
<br />
<br />
<br />
== Models and drawings ==<br />
'''Al table'''<br />
<br />
[[File:STLspool.zip]] STL files of printed parts of ZemcikO Al table.<br />
<br />
<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:DSC_0038_AL_stul_s_telesy2.jpg&diff=107262File:DSC 0038 AL stul s telesy2.jpg2013-09-30T09:40:33Z<p>Zemciko: Zemciko AL heated bed with bonded heat elements.</p>
<hr />
<div>Zemciko AL heated bed with bonded heat elements.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107261ZemcikO AL table2013-09-30T09:33:54Z<p>Zemciko: /* 3D model and photo of working AL table */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
== Improvements ==<br />
'''energy chains'''<br />
Testing.<br />
<br />
<br />
<br />
== Models and drawings ==<br />
'''Al table'''<br />
<br />
[[File:STLspool.zip]] STL files of printed parts of ZemcikO Al table.<br />
<br />
<br />
<br />
== 3D model and photo of working AL table ==<br />
<br />
Heated table works reliably for the second month. With an additional 21V power source is not a problem to reach 150°C in minutes. Using 12V PC supply is much slower (up to 1/2 hour), but it still works.<br />
<br />
<gallery><br />
File:Table1.jpg<br />
File:AL_stul_na_tiskarne_2.jpg<br />
File:DSC_0313_stul_na_tiskarne_4.jpg<br />
</gallery><br />
<br />
== ''TODO'' ==<br />
<br />
This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:DSC_0313_stul_na_tiskarne_4.jpg&diff=107260File:DSC 0313 stul na tiskarne 4.jpg2013-09-30T09:33:36Z<p>Zemciko: Zemciko AL heated bed mounted on reprap sinuhed.</p>
<hr />
<div>Zemciko AL heated bed mounted on reprap sinuhed.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:AL_stul_na_tiskarne_2.jpg&diff=107259File:AL stul na tiskarne 2.jpg2013-09-30T09:32:20Z<p>Zemciko: Zemciko AL heated bed mounted on reprap sinuhed.</p>
<hr />
<div>Zemciko AL heated bed mounted on reprap sinuhed.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107258ZemcikO AL table2013-09-30T09:23:57Z<p>Zemciko: /* Al table */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch for center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
== Improvements ==<br />
'''energy chains'''<br />
Testing.<br />
<br />
<br />
<br />
== Models and drawings ==<br />
'''Al table'''<br />
<br />
[[File:STLspool.zip]] STL files of printed parts of ZemcikO Al table.<br />
<br />
<br />
<br />
== 3D model and photo of working AL table ==<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
== ''TODO'' ==<br />
<br />
This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107092ZemcikO AL table2013-09-27T12:13:37Z<p>Zemciko: /* Wiring */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
<gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch por center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
== Improvements ==<br />
'''energy chains'''<br />
Testing.<br />
<br />
<br />
<br />
== Models and drawings ==<br />
'''Al table'''<br />
<br />
[[File:STLspool.zip]] STL files of printed parts of ZemcikO Al table.<br />
<br />
<br />
<br />
== 3D model and photo of working AL table ==<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
== ''TODO'' ==<br />
<br />
This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=107091ZemcikO AL table2013-09-27T12:12:18Z<p>Zemciko: </p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
gallery><br />
File:Zapojeni_stolu_3a.jpg<br />
</gallery><br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch por center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
== Improvements ==<br />
'''energy chains'''<br />
Testing.<br />
<br />
<br />
<br />
== Models and drawings ==<br />
'''Al table'''<br />
<br />
[[File:STLspool.zip]] STL files of printed parts of ZemcikO Al table.<br />
<br />
<br />
<br />
== 3D model and photo of working AL table ==<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
== ''TODO'' ==<br />
<br />
This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Zapojeni_stolu_3a.jpg&diff=107090File:Zapojeni stolu 3a.jpg2013-09-27T12:10:02Z<p>Zemciko: Connecting of ZemcikO Aluminium table with 350W external power supply.</p>
<hr />
<div>Connecting of ZemcikO Aluminium table with 350W external power supply.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Zapojeni_stolu_4.jpg&diff=107086File:Zapojeni stolu 4.jpg2013-09-27T11:47:46Z<p>Zemciko: Zemciko uploaded a new version of &quot;File:Zapojeni stolu 4.jpg&quot;: 5R6 resistors replaced with 4R7.</p>
<hr />
<div>Wiring for Zemciko Alu table v2b.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Zapojeni_stolu_2.jpg&diff=107084File:Zapojeni stolu 2.jpg2013-09-27T11:46:15Z<p>Zemciko: Zemciko uploaded a new version of &quot;File:Zapojeni stolu 2.jpg&quot;: 5R6 resistors replaced with 4R7.</p>
<hr />
<div>Wiring for Zemciko Alu table v2.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Zapojeni_stolu_3.jpg&diff=107083File:Zapojeni stolu 3.jpg2013-09-27T11:45:01Z<p>Zemciko: Zemciko uploaded a new version of &quot;File:Zapojeni stolu 3.jpg&quot;: 6R8 resistors replaced with 5R7.</p>
<hr />
<div>Wiring for Zemciko Alu table v1b.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Zapojeni_stolu_1.jpg&diff=107082File:Zapojeni stolu 1.jpg2013-09-27T11:43:32Z<p>Zemciko: Zemciko uploaded a new version of &quot;File:Zapojeni stolu 1.jpg&quot;: 6R8 resistors replaced with 5R7.</p>
<hr />
<div>Wiring for Zemciko ALu table v1.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=106716ZemcikO AL table2013-09-20T09:21:03Z<p>Zemciko: /* Wiring */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V. This value, however, means very slow heating (up to +-30min).<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch por center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
== Improvements ==<br />
'''energy chains'''<br />
Testing.<br />
<br />
<br />
<br />
== Models and drawings ==<br />
'''Al table'''<br />
<br />
[[File:STLspool.zip]] STL files of printed parts of ZemcikO Al table.<br />
<br />
<br />
<br />
== 3D model and photo of working AL table ==<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
== ''TODO'' ==<br />
<br />
This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=106715ZemcikO AL table2013-09-20T09:19:18Z<p>Zemciko: /* Wiring */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V.<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch por center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
== Improvements ==<br />
'''energy chains'''<br />
Testing.<br />
<br />
<br />
<br />
== Models and drawings ==<br />
'''Al table'''<br />
<br />
[[File:STLspool.zip]] STL files of printed parts of ZemcikO Al table.<br />
<br />
<br />
<br />
== 3D model and photo of working AL table ==<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
== ''TODO'' ==<br />
<br />
This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=106714ZemcikO AL table2013-09-20T09:15:38Z<p>Zemciko: /* Wiring */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
<br />
<br />
'''Standard PC power supply wiring'''<br />
<br />
I suggest a power source with higher voltage than 12V. After several attempts, I came to the requirement of a minimum 120W of thermal power. It means u need 1,2ohm for 12V.<br />
<br />
''5R6 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 20 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,12 Ohm. (If we ignore electrical resistance of wires). For 12V we get approximatelly 128.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
</gallery><br />
''4R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.175 Ohm. For 12V we get approximatelly 122.5W of electrical/thermal power.<br />
<gallery><br />
File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
</gallery><br />
In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
<br />
'''Industrial power supply wiring'''<br />
Its much better solution u can use 24V 350W power supply for +- 25-30Euro.<br />
This power supply can be set to a lower or higher voltage. I was able to set 21-27V. Just remember this power supply cannot maintain 350W permanently. Safe limit is +- 290W. For connecting to ramps mosfets use 12V swiching relay. It cost around 1,5Euro and works realy well.<br />
With 21V u can use 6R8 or 5R7 resistors. I suggest you use a wire type resistors Or resistors for up to 150°C. Standard metalic ones works, but after first test and reaching 130°C, they changed its value! Up to 2/3 of the initial value.<br />
<br />
== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
<br />
<gallery><br />
File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
</gallery><br />
<br />
2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
<br />
== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch por center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
<br />
<gallery><br />
File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
</gallery><br />
<br />
== Improvements ==<br />
'''energy chains'''<br />
Testing.<br />
<br />
<br />
<br />
== Models and drawings ==<br />
'''Al table'''<br />
<br />
[[File:STLspool.zip]] STL files of printed parts of ZemcikO Al table.<br />
<br />
<br />
<br />
== 3D model and photo of working AL table ==<br />
<gallery><br />
File:Table1.jpg<br />
<br />
</gallery><br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
== ''TODO'' ==<br />
<br />
This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=ZemcikO_AL_table&diff=100324ZemcikO AL table2013-08-01T15:16:19Z<p>Zemciko: /* Al table */</p>
<hr />
<div>{{Development<br />
<!--Header--><br />
|name = ZemcikO Aluminium heated table<br />
|status = testing<br />
<!--Image--><br />
|image = Table1.jpg<br />
<!--General--><br />
|description = This is my simple material spool holder.<br />
|license = [[GPL]]<br />
|author = Zemciko<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Development|Mendel Development]], [[:Category:MPrusa Development|Prusa Development]], [[:Category:Development|Development]]<br />
|cadModel = Alibre 3D, STL, pdf<br />
|url = http://reprap.org/wiki/ZemcikO_AL_table<br />
}}<br />
<br />
== Aluminum heated table for REPRAP sinuhed or mendel clone ==<br />
<br />
'''Status:''' testing.<br />
<br />
'''Description:''' <br />
Originally designed for my reprap sinuhed project. It is easy to make if you have access to drill a small home milling machine.<br />
The cost of input material is low. Published documentation is for sinuhed and Mendel project. Most parts are similar. Main difference is size of alluminium plate and position of heating elements. Compared to Table from printed circuit board this table achieves greater thermal Stability. For printing on Alu u will need kapton tape applied.<br />
<br />
== Bill of materials ==<br />
<br />
'''Alu table'''<br />
<br />
250x250x3 mm Alu plate (~5E)<br />
<br />
16mm diameter clear PTFE 200-250mm long (2,5E)<br />
<br />
100k thermistor (3E)<br />
<br />
ABS printed parts (~10ccm) (0,5E)<br />
<br />
Small piece of capton tape (0E)<br />
<br />
Wires (2E)<br />
<br />
Terminal Block (4x2) (1E)<br />
<br />
Thermal glue 3,5ml (12E)<br />
<br />
Compression spring 6*30mm 10N +- (2E)<br />
<br />
8x M3*16 countersunk screw + selflock nuts (1E)<br />
<br />
4x M4x40 hexa + 8x Wide washer +4x selflock nuts<br />
<br />
1x M4x40 imbus + 1x self-lock nut (both less then 1E)<br />
<br />
<br />
'''Heat elements'''<br />
<br />
35x3x2000 mm Alu rod (~4E)<br />
<br />
36x M3x8mm countersunk screw<br />
<br />
36x M3 nuts (both less then 2E)<br />
<br />
18x 6R8 3W resistors (6E) <br />
<br />
Small piece of aluminium foil (0E)<br />
<br />
--------------------------------------------------------<br />
<br />
Total +- 42 Euro<br />
<br />
== Wiring == <br />
''6R8 resistors''<br />
Preffer wired or vitreous resistors for 2 or 3W. They must be stable at 150°C. For one table u will need 18 resistors. <br />
Resistors need to be connected according to the drawing. The resulting electrical resistance is 1,51 Ohm. (I we ignore electrical resistance of wires). For 12V we get approximatelly 95W of electrical/thermal power.<br />
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File:Zapojeni_stolu_1.jpg<br />
File:Zapojeni_stolu_3.jpg<br />
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''5R7 resistors''<br />
U will need less amout of these resistorsat the expense of a bigger load. (possibly shorter life of resistors). U will need only 16 resistors. Resulting electrical resistance will be 1.425 Ohm. For 12V we get approximatelly 101W of electrical/thermal power.<br />
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File:Zapojeni_stolu_2.jpg<br />
File:Zapojeni_stolu_4.jpg<br />
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In both cases standard PC power supply with 15A on output, for whole reprap, should be enough.<br />
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== Heat elements ==<br />
Main part are made from 3mm Aluminium profile (3x30mm). Any Al profile with 3 and higher width can be used. Even 16mm diameter rod (if u realy like milling). 4mm would be better for increased rigidity.<br />
U will need to cut, mill and drill 36pieces plus small simple tablet for termistor.<br />
Its good to join 2 corresponding pieces together before drilling central hole. <br />
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File:Dily_telesa_01s.jpg <br />
File:Spojeny_blok.JPG<br />
File:Hotovy_blok.JPG<br />
File:Desticka_s_resistorem.JPG<br />
File:Topne_teleso_stolu_01.jpg<br />
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2-3W Resistors usually have 4,2mm diameter. For better contact use aluminium foil wrapped around the resistor. 10mm wide and 100mm long piece should be enough. Thermistor in separate tablet should be wrapped with small piece of kapton tape.<br />
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== Al table ==<br />
250x250x3mm Al sheet was used. For conventional mendel u will need to cut it to 210x210x3mm. Draw careffuly position of 8 holes for PTFE isolation blocks. Use punch por center of holes and countersink it to right depth. Bolts should be just unter surface of table. Holes should be countersunk from concave side of AL sheet.<br />
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File:250table_al.jpg<br />
File:Slepeny_stul_02.jpg<br />
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== Improvements ==<br />
'''energy chains'''<br />
Testing.<br />
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== Models and drawings ==<br />
'''Al table'''<br />
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[[File:STLspool.zip]] STL files of printed parts of ZemcikO Al table.<br />
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== 3D model and photo of working AL table ==<br />
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File:Table1.jpg<br />
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== ''TODO'' ==<br />
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This page is under contruction. Ill include complete documentation + production instructions</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:Slepeny_stul_02.jpg&diff=100323File:Slepeny stul 02.jpg2013-08-01T15:16:00Z<p>Zemciko: Al sheet with mounted parts for zemciko Al heated table.</p>
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<div>Al sheet with mounted parts for zemciko Al heated table.</div>Zemcikohttps://reprap.org/mediawiki/index.php?title=File:250table_al.jpg&diff=100322File:250table al.jpg2013-08-01T15:14:32Z<p>Zemciko: Drawing of Al sheet fo zemciko heated Al table.</p>
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<div>Drawing of Al sheet fo zemciko heated Al table.</div>Zemciko