Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 07:10AM |
Registered: 9 years ago Posts: 107 |
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paul_delta
I had the same problem. With original fan mount it's hard to get stable temperature above 200C. I designed this sleeve (on the picture - the yellow one), just print it and put between the fan and fan mount: [www.thingiverse.com]
[attachment 67037 folgertech_kossel_fan_mod_view1.jpg]
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Legrand
I had some problems getting above 210°C due to the hot end being too close to the circular radiator and fan (after I switched over to the 3mm head) so I created a small aluminum "foil" shield to keep the "wind" away form the hot end and am now printing at 230°C.
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 08:14AM |
Registered: 9 years ago Posts: 432 |
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Legrand
Isn't the fan meant to cool the cylindrical heat sink above the hot end?
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paul_delta
I had the same problem. With original fan mount it's hard to get stable temperature above 200C. I designed this sleeve (on the picture - the yellow one), just print it and put between the fan and fan mount: [www.thingiverse.com]
[attachment 67037 folgertech_kossel_fan_mod_view1.jpg]
Quote
Legrand
I had some problems getting above 210°C due to the hot end being too close to the circular radiator and fan (after I switched over to the 3mm head) so I created a small aluminum "foil" shield to keep the "wind" away form the hot end and am now printing at 230°C.
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 08:53AM |
Registered: 9 years ago Posts: 107 |
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paul_delta
Yes, this fan cools heat sink, but without this adapter it blows also to the heater element and reduce the effectiveness/temperature . The adapter just focuses the air flow on the heat sink.
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Legrand
Isn't the fan meant to cool the cylindrical heat sink above the hot end?
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paul_delta
I had the same problem. With original fan mount it's hard to get stable temperature above 200C. I designed this sleeve (on the picture - the yellow one), just print it and put between the fan and fan mount: [www.thingiverse.com]
[attachment 67037 folgertech_kossel_fan_mod_view1.jpg]
Quote
Legrand
I had some problems getting above 210°C due to the hot end being too close to the circular radiator and fan (after I switched over to the 3mm head) so I created a small aluminum "foil" shield to keep the "wind" away form the hot end and am now printing at 230°C.
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 08:58AM |
Registered: 9 years ago Posts: 432 |
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Legrand
So then, in real life, you don't have it set up as shown in the CAD drawing you posted (pointing at the nozzle tip), you have it aimed upward to the heatsink instead.
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paul_delta
Yes, this fan cools heat sink, but without this adapter it blows also to the heater element and reduce the effectiveness/temperature . The adapter just focuses the air flow on the heat sink.
Quote
Legrand
Isn't the fan meant to cool the cylindrical heat sink above the hot end?
Quote
paul_delta
I had the same problem. With original fan mount it's hard to get stable temperature above 200C. I designed this sleeve (on the picture - the yellow one), just print it and put between the fan and fan mount: [www.thingiverse.com]
[attachment 67037 folgertech_kossel_fan_mod_view1.jpg]
Quote
Legrand
I had some problems getting above 210°C due to the hot end being too close to the circular radiator and fan (after I switched over to the 3mm head) so I created a small aluminum "foil" shield to keep the "wind" away form the hot end and am now printing at 230°C.
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 09:02AM |
Registered: 9 years ago Posts: 107 |
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paul_delta
I'm talking about the yellow adapter. The bottom one - is additional fan for filament.
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Legrand
So then, in real life, you don't have it set up as shown in the CAD drawing you posted (pointing at the nozzle tip), you have it aimed upward to the heatsink instead.
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paul_delta
Yes, this fan cools heat sink, but without this adapter it blows also to the heater element and reduce the effectiveness/temperature . The adapter just focuses the air flow on the heat sink.
Quote
Legrand
Isn't the fan meant to cool the cylindrical heat sink above the hot end?
Quote
paul_delta
I had the same problem. With original fan mount it's hard to get stable temperature above 200C. I designed this sleeve (on the picture - the yellow one), just print it and put between the fan and fan mount: [www.thingiverse.com]
[attachment 67037 folgertech_kossel_fan_mod_view1.jpg]
Quote
Legrand
I had some problems getting above 210°C due to the hot end being too close to the circular radiator and fan (after I switched over to the 3mm head) so I created a small aluminum "foil" shield to keep the "wind" away form the hot end and am now printing at 230°C.
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 09:04AM |
Registered: 9 years ago Posts: 28 |
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paul_delta
Here is my video.
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 09:40AM |
Registered: 8 years ago Posts: 188 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 02:18PM |
Registered: 9 years ago Posts: 432 |
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Vlerherg
Just curious, but could you tell me what your current accel/jerk settings are? Want to compare with mine, as I just used similar settings to my cartesian printer as a baseline, but since the physics are very different with a delta I do not think they are optimal. Also curious because I know if they are too aggressive it can cause issues with top speed never being attained.
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 04:16PM |
Registered: 9 years ago Posts: 28 |
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paul_delta
Finally I printed this 20x20mm model at 120mm/s. I inspected my Eeprom configuration and realized that my acceleration was too low (300mm/s2) - after experiments to make the printer quieter for night time I forgot to set it back
Also I tried to increase acceleration to find the maximum that printer can handle. For my printer and Folgertech recommended vRef driver voltage it's safe to set acceleration up to 4000 mm/s2. 5000 and higher - 100% head crash because of missed steps.
The first video, where the speed was 60mm/s (not 120mm/s as expected) the acceleration was only 300mm/s2, Max. jerk 20. Here is the new video, with acceleration 4000 mm/s2 and max. jerk 35.
[youtu.be]
Quote
Vlerherg
Just curious, but could you tell me what your current accel/jerk settings are? Want to compare with mine, as I just used similar settings to my cartesian printer as a baseline, but since the physics are very different with a delta I do not think they are optimal. Also curious because I know if they are too aggressive it can cause issues with top speed never being attained.
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 05:13PM |
Registered: 9 years ago Posts: 432 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 05:32PM |
Registered: 8 years ago Posts: 188 |
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paul_delta
Has anyone tried this kind of effector [www.thingiverse.com] ?
Very interesting solution, where the tip works as z-probe.
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 09:55PM |
Registered: 8 years ago Posts: 188 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 10:04PM |
Registered: 9 years ago Posts: 432 |
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Captain_Tim
In the Google Drive where the manual is for this printer. I found two sets of firmware, one entitled "KosselRevB" and the other "KosselRevBPE". What's the difference?
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 10:05PM |
Registered: 9 years ago Posts: 432 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 10:12PM |
Registered: 8 years ago Posts: 188 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 10:26PM |
Registered: 9 years ago Posts: 432 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 10:30PM |
Registered: 8 years ago Posts: 188 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 10:33PM |
Registered: 9 years ago Posts: 432 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 04, 2015 10:37PM |
Registered: 9 years ago Posts: 432 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 05, 2015 08:27PM |
Registered: 9 years ago Posts: 432 |
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paul_delta
Also I tried to increase acceleration to find the maximum that printer can handle. For my printer and Folgertech recommended vRef driver voltage it's safe to set acceleration up to 4000 mm/s2. 5000 and higher - 100% head crash because of missed steps.
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 06, 2015 03:39PM |
Registered: 8 years ago Posts: 2 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 06, 2015 03:51PM |
Registered: 9 years ago Posts: 432 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 08, 2015 07:54AM |
Registered: 8 years ago Posts: 2 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 08, 2015 09:12AM |
Registered: 9 years ago Posts: 432 |
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Granite
If I move the hot end up and down, it comes back to within +/- 0.001 inch of the original position. So the problem may have nothing to do with the servos. (This is true for 20 mm/s^2 acceleration as well.)
...
Is it possible that the Z probe is somehow interfering near the plate? I mean when it triggers, can that have an effect on how low will the hot end go?
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 08, 2015 09:17AM |
Registered: 9 years ago Posts: 67 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 08, 2015 10:26AM |
Registered: 8 years ago Posts: 188 |
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llamatrails
Did your kit come with belt tensioning springs? Where did you install them?
I had a similar problem, and found that the belt was tighter from the carriage down then from the carriage up, especially when the effector was at Z0. In other words, the motor is pulling at the carriage to keep the belt tight, and the belt is looser as it goes up to the top of the frame where it goes over the bearings and back down the other side.
The tensioner on mine is on the belt just above where the belt attaches to the carriage so it isn't in the way when at Z MAX.
Rick
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 08, 2015 12:06PM |
Registered: 9 years ago Posts: 67 |
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Captain_Tim
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llamatrails
Did your kit come with belt tensioning springs? Where did you install them?
I had a similar problem, and found that the belt was tighter from the carriage down then from the carriage up, especially when the effector was at Z0. In other words, the motor is pulling at the carriage to keep the belt tight, and the belt is looser as it goes up to the top of the frame where it goes over the bearings and back down the other side.
The tensioner on mine is on the belt just above where the belt attaches to the carriage so it isn't in the way when at Z MAX.
Rick
I put my tensioning springs under the carriages, just under where you loop the belt around it.
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 08, 2015 12:59PM |
Registered: 9 years ago Posts: 90 |
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 08, 2015 01:30PM |
Registered: 9 years ago Posts: 432 |
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fattmann
I added paul_delta's cold end fan shroud, as I couldn't get my hotend over 200 with the fan blowing over everything. I printed a few things at 210, and while I still had stinging, they turned out amazing. I haven't tried to print anything above 210- that's the point where my Hatchbox PLA seems to instantly liquefy. I had to reverse about 20mm to keep it from just oozing out of the nozzle at idle. It's a tricky first couple layers at 210 as it is. Above that will be on my list.
I then printed a combo fan duct (here), hoping that active cooling would help my stringing- nope. make it worse. Instead of fiberglass fine strings, I would get blobs on the edges instead. So I ended up taping up that bottom port, and will be going back to paul's shroud.
I went down in temp as a test as well. Printed a few test pieces at 170- that helped stringing more than going up to 210, but then had issues with line width.
The battle continues....
Re: Folger Tech Kossel Delta 2020 Full 3D Printer Kit w/Auto-Level December 08, 2015 01:38PM |
Registered: 9 years ago Posts: 432 |
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fattmann
I then printed a combo fan duct (here), hoping that active cooling would help my stringing- nope. make it worse. Instead of fiberglass fine strings, I would get blobs on the edges instead. So I ended up taping up that bottom port, and will be going back to paul's shroud.