https://reprap.org/mediawiki/api.php?action=feedcontributions&user=Nathanb&feedformat=atomRepRap - User contributions [en]2024-03-28T22:31:40ZUser contributionsMediaWiki 1.30.0https://reprap.org/mediawiki/index.php?title=RUG/Pennsylvania/State_College/Presentation&diff=38077RUG/Pennsylvania/State College/Presentation2011-07-08T13:01:06Z<p>Nathanb: /* Members */</p>
<hr />
<div>{| style="margin-right:1em;" align="right"<br />
| __TOC__<br />
|}<br />
<br />
[[File:Psurug.jpg|500 px]]<br />
<br />
<br />
<br />
<br />
= What's New? =<br />
<br />
'''6.1.11''': Summer FabLab development in full swing, preparing for class this fall.<br />
<br />
'''4.28.11''': Showcased RepRap Mendels at the Penn State Senior Design Fair!<br />
<gallery><br />
File:SR_Design_Fair1.JPG<br />
File:SR_Design_Fair2.JPG<br />
</gallery><br />
<br />
'''3.29.11''': [http://www.youtube.com/watch?v=nre2dfo4xJw Unit One is running]! <br />
<br />
'''3.5.11''': One class Mendel is alive and printing, and everything but a ribbon cable is in place for Unit One.<br />
<br />
'''2.24.11''': Our PSU class' repraps are nearing completion, with a Huxley and Mendel all but fully assembled and programmed, and our third close behind. With a bit of luck, all three should be online and ready for their maiden prints within the week.<br />
<br />
=Prototyping systems in development=<br />
<br />
<br><br><br />
<br />
<center><br />
{| style="border:1px solid darkgray;" cellpadding="10" cellspacing="10" align="center"<br />
|-<br />
| [[File:U0_getting_somewhere.jpg|200px|link=Etherdais_Unit_Zero]]<br />
<br />
'''[[Etherdais_Unit_Zero | Unit Zero]]'''<br />
| [[File:NILeS.jpg|200px|link=Etherdais_Unit_One]]<br />
<br />
'''[[Etherdais_Unit_One | Unit One]]'''<br />
<br />
| [[file:M1_wk6.jpg|200px|link=PSU_Unit_A]]<br />
<br />
'''[[PSU_Unit_A| PSU Mendel A]]'''<br />
|-<br />
| [[file:M2_wk6.jpg|200px|link=PSU_Unit_B|]]<br />
<br />
'''[[PSU_Unit_B | PSU Mendel B]]'''<br />
<br />
| [[File:Huxley_wk6.jpg|200px|link=PSU_Unit_C|]]<br />
<br />
'''[[PSU_Unit_C | PSU Huxley]]'''<br />
|'''[[File:Fabathome1.jpg|200px|]]'''<br />
<br />
'''[[PSU_Fab@Home | PSU's Fab@Home]]'''<br />
<br />
|}<br />
<br />
</center><br />
<br><br><br />
<br />
=Projects=<br />
<br />
*[[PSU_tips|Tip Profiles]]<br />
*[[TechZone InfoHub]]<br />
*[[Waste Reclamation System]]<br />
*[[3D Scanner Projects]]<br />
*[[Imperial Reprap SAE]]<br />
*[[RUG/Pennsylvania/State College/Heated Bed]]<br />
*[[RUG/Pennsylvania/State College/Electronics | Electronics]]<br />
*[[RUG/Pennsylvania/State College/Z_Opto_Holder | Z Opto Holder]]<br />
*[[RUG/Pennsylvania/State College/Pen_Plotter | Pen Plotter]]<br />
<br />
=Useful Links=<br />
*[http://reprap.org/wiki/Gcode#RepRap_G_Code_Fields Gcode for RepRaps]<br />
*[http://www.mendel-parts.com/forum/viewtopic.php?id=30&t_id=1 Good guide to Skeinforge]<br />
*[http://ultimachine.com/content/mendel-notes Skeinforge PLA Profile]<br />
*[http://www.mendel-parts.com/new_forum/phpBB3/viewtopic.php?f=37&t=119 Gen6 SF Settings]<br />
*[http://www.hive76.org/all-about-patents All About Patents]<br />
*[http://rhin.crai.archi.fr/rld/plugin_details.php?id=429- Plugins for Sketchup file to export .stl] <br />
*[http://www.micromouse.ca/index.html- AccuTrans3D (trial version) stl file editor and save]<br />
*[[Tips for Printing with RepSnapper]]<br />
<br />
<br />
== Firmware and Files==<br />
*[[File:EMFApr29profiles.rar]] - Skeinforge Profiles<br />
*[[File:EMFApr29alterations.rar]] - Skeinforge Alterations<br />
*[[File:Fix.rar]] - AWK Script for fixing Skeinforge<br />
*[[File:EMFapr29awk.rar]] - Happy Vally AWK Directory<br />
*[[File:FirmwareforOneWireAD_heatbed_brnrd_20110317.zip | Alternate extruder with heated bed]] - documented [http://forums.reprap.org/read.php?146,74307 here]<br />
*[[File:Emf_Bestextruder4_07.rar | Bestextruder 4-7-11]] - A copy of the extruder code we have been using with max endstops enabled.<br />
*[[File:Psu_Bestmobocode2_24_2011.rar | Bestmobo 4-7-11]] - TZ Gen3 Mobo code altered for our machines<br />
*[[File:Extruder_class_jpj12_2011-04-07_temp_fix.pde]] - Modified version of Bestextruder4_07 with brnrd's fix for temp overflow bug. DOES NOT WORK<br />
*[[File:SC_Skeinforge_Mar24.rar]] - Skeinforge Settings as of March 24<br />
<br />
= Subpages =<br />
<splist/><br />
<br />
<br />
<br />
<br />
=Members=<br />
<br />
Copy and edit the following from "Example User" to your own handle to add yourself to the membership list:<br />
<br />
*[[User:Nix-7c0 | Nix-7c0]]<br />
*[[User:joshj | joshj]]<br />
*[[User:bjs5286 | bjs5286]]<br />
*[[User:EtherDais | EtherDais]]<br />
*[[User:PhiloXXI | PhiloXXI]]<br />
*[[User:KtripPSU | KtripPSU]]<br />
*[[User:php5014 | php5014]]<br />
*[[User:mslusher2011 | mslusher2011]]<br />
*[[User:KtripPSU| KtripPSU]]<br />
*[[User:Jza127| Jza127]]<br />
*[[User:Dpd5061| Dpd5061]]<br />
*[[User:Nathanb | Nathanb]]<br />
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<h2 id="mainPage.news.title" style="background:#eeeeee; font-size: 105%; line-height: 120%; font-weight: bold; padding: 0px; margin:0px;padding: 0.4em;"><br />
[[Image:20px-Exquisite-khelpcenter.png|frameless|right]][http://forums.reprap.org/feed.php?223 Forum/Mailing List]</h2><br />
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{{PSURUG}}<br />
[[Category:RUG]]</div>Nathanbhttps://reprap.org/mediawiki/index.php?title=User:Nathanb&diff=38076User:Nathanb2011-07-08T12:56:21Z<p>Nathanb: </p>
<hr />
<div>Came across the RepRap Project about 2 months ago and decided right away that I would make my own Prusa. Researched and researched and am now just about done with my first build.<br />
<br />
Here are some pictures:<br />
<br />
[[File:Reprap frame.jpg]]<br />
<br />
This is the beginnings of the build.<br />
<br />
[[File:Ramps1.2.jpg]]<br />
<br />
Here is my first RAMPS V1.2 board - have since upgraded to RAMPS V1.3<br />
<br />
[[File:Heated Bed top.jpg]]<br />
[[File:Heated Bed bottom.jpg]]<br />
<br />
My own heated bed - design based around Nophead's blog post on the subject.<br />
<br />
[[File:Side View.jpg]]<br />
<br />
Build is just about finished here - wiring motors... You can see a Sanguinololu here, but I'm not currently using it.<br />
<br />
[[File:Finished.jpg]]<br />
<br />
So this is it! I really need to do something about that wiring though...<br />
<br />
<br />
----<br />
<br />
== Links ==<br />
<br />
Here will be a place that I'll be keeping track of some good external (or internal) links.<br />
<br />
- [http://hydraraptor.blogspot.com Nophead's Blog]<br />
<br />
- [http://arcol.hu Arcol Blog/Store]<br />
<br />
- [[Prusa Mendel Assembly]]<br />
<br />
- [[PCPowerSupply]]<br />
<br />
- [[RUG/Pennsylvania/State College]]</div>Nathanbhttps://reprap.org/mediawiki/index.php?title=User:Nathanb&diff=38075User:Nathanb2011-07-08T12:38:54Z<p>Nathanb: Created page with 'Came across the RepRap Project about 2 months ago and decided right away that I would make my own Prusa. Researched and researched and am now just about done with my first build…'</p>
<hr />
<div>Came across the RepRap Project about 2 months ago and decided right away that I would make my own Prusa. Researched and researched and am now just about done with my first build.<br />
<br />
Here are some pictures:<br />
<br />
[[File:Reprap frame.jpg]]<br />
<br />
This is the beginnings of the build.<br />
<br />
[[File:Ramps1.2.jpg]]<br />
<br />
Here is my first RAMPS V1.2 board - have since upgraded to RAMPS V1.3<br />
<br />
[[File:Heated Bed top.jpg]]<br />
[[File:Heated Bed bottom.jpg]]<br />
<br />
My own heated bed - design based around Nophead's blog post on the subject.<br />
<br />
[[File:Side View.jpg]]<br />
<br />
Build is just about finished here - wiring motors... You can see a Sanguinololu here, but I'm not currently using it.<br />
<br />
[[File:Finished.jpg]]<br />
<br />
So this is it! I really need to do something about that wiring though...</div>Nathanbhttps://reprap.org/mediawiki/index.php?title=File:Side_View.jpg&diff=38074File:Side View.jpg2011-07-08T12:32:28Z<p>Nathanb: This was while still wiring the motors - not completely finished yet.</p>
<hr />
<div>This was while still wiring the motors - not completely finished yet.</div>Nathanbhttps://reprap.org/mediawiki/index.php?title=File:Heated_Bed_bottom.jpg&diff=38071File:Heated Bed bottom.jpg2011-07-08T12:32:27Z<p>Nathanb: My own heated bed - following nophead's design with Aluminum-clad resistors. Works okay for PLA so far..</p>
<hr />
<div>My own heated bed - following nophead's design with Aluminum-clad resistors. Works okay for PLA so far..</div>Nathanbhttps://reprap.org/mediawiki/index.php?title=File:Heated_Bed_top.jpg&diff=38072File:Heated Bed top.jpg2011-07-08T12:32:27Z<p>Nathanb: Covered the top of my heated bed with Kapton tape.</p>
<hr />
<div>Covered the top of my heated bed with Kapton tape.</div>Nathanbhttps://reprap.org/mediawiki/index.php?title=File:Finished.jpg&diff=38073File:Finished.jpg2011-07-08T12:32:27Z<p>Nathanb: This is the beast fully wired - I really need to do something about that wiring though..</p>
<hr />
<div>This is the beast fully wired - I really need to do something about that wiring though..</div>Nathanbhttps://reprap.org/mediawiki/index.php?title=File:Ramps1.2.jpg&diff=38070File:Ramps1.2.jpg2011-07-08T12:32:25Z<p>Nathanb: My RAMPS V1.2 board - fully assembled myself. This one I even bought my own components for.</p>
<hr />
<div>My RAMPS V1.2 board - fully assembled myself. This one I even bought my own components for.</div>Nathanbhttps://reprap.org/mediawiki/index.php?title=File:Reprap_frame.jpg&diff=38069File:Reprap frame.jpg2011-07-08T12:29:08Z<p>Nathanb: This is a picture of my build process - just structural at this point.</p>
<hr />
<div>This is a picture of my build process - just structural at this point.</div>Nathanbhttps://reprap.org/mediawiki/index.php?title=GranuleExtruder&diff=38068GranuleExtruder2011-07-08T12:14:40Z<p>Nathanb: Added great link to a working granule extruder.</p>
<hr />
<div>{{Development<br />
|status = experimental<br />
|description = A experimental extruder designed to use cheap plastic nurdle instead of more-expensive plastic welding rod.<br />
|author = Adrian<br />
|categories = [[:Category:Extruders|Extruders]][[Category:Extruders]], [[:Category:Cold End|Cold End]][[Category:Cold End]]<br />
}}<br />
[[image:GranuleExtruder-working-small.jpg|thumb|left]]<br />
<br />
{{merge|Granule Extruder Team}}<br />
<br />
The [[RepRapOneDarwinThermoplastExtruder|standard RepRap polymer extruder]] works very reliably, is simple, and can be made almost all out of RP parts. But it needs a supply of 3mm diameter polymer filament. This is not hard to obtain (many companies can make it from polymer granules), but it does represent an extra cost and an extra process.<br />
<br />
Timothy Nixon and Adrian Tan of the School of Mechanical Engineering, University of Adelaide, in Australia have designed [http://fabathome.org/wiki/index.php?title=Fab%40Home:Fabbers_of_the_World#School_of_Mechanical_Engineering.2C_University_of_Adelaide.2C_Australia an extruder for Fab@Home] that uses polymer granules directly, and such granules are the standard and cheapest way that all thermoplastic polymers are supplied. I was so impressed that I decided to pinch some of their ideas (that's what open-source is all about :-) ) and add it to something Forrest and I tried almost two years ago (see the [http://blog.reprap.org/2006/02/initial-experiments-on-filament.html RepRap blog for Friday, February 17, 2006] and the subsequent fortnight).<br />
<br />
We hope that an extruder that can handle a "virgin" nurdle (a plastic pellet) can also handle recycled plastic shreds or dust from a plastic [[recycler]].<br />
<br />
For further information, see [http://reprapdelft.files.wordpress.com/2010/04/reprap-granule-extruder-tudelft1.pdf this paper] by TU Delft Uni on their working screw-driven granule extruder.<br />
<br />
<br clear="all"><br />
<br />
== Design and construction ==<br />
<br />
[[image:GranuleExtruder-granule-extruder-diagram.jpg|thumb]]<br />
<br />
The device consists of a 30 mm length of ordinary 15 mm diameter copper plumbing pipe with a screw auger running down the middle. The screw is made from a 6 mm diameter brass rod. I twisted five 1.2mm diameter copper mains wires together to make a fatter copper wire, twisted that round the brass to form a helix, and soldered it all together. This was much easier than turning the helix in a lathe, and also allowed a variable pitch (closer windings at the bottom) to be made easily.<br />
[[auger_screw|Another way to make auger screw]]<br />
<br />
<br clear="all"><br />
<br />
[[image:GranuleExtruder-screw-small.jpg|thumb]]<br />
<br />
I deliberately made the screw slightly oversized (the i.d. of the copper pipe was 13.5 mm and I made the screw about 14.5, though it wasn't very smooth). Then I turned it between centres just to skim the outside of the helix down to about 13 mm.<br />
<br />
At the bottom (I was pleased with this idea...) the screw has a blind hole with side holes that run out between the helical coils. This allows the polymer to flow out down the centre of the screw, down a short length of M6 brass studding with a centre hole, and into a standard RepRap nozzle made from a brass M6 acorn (or dome) nut.<br />
<br />
<br />
<br clear="all"><br />
<br />
<br />
[[image:GranuleExtruder-casting-jb-small.jpg|thumb]]<br />
<br />
I set the copper tube in a rectangle of JB Weld high-temperature epoxy. To do this I made an RP rectangle 30 mm by 40 mm with a 15 mm hole in the middle and two 3mm holes at the ends. Then I taped a strip of overhead-projector acetate sheet round it to make a mould, and put two 3mm diameter silver-steel rods through to form holes. I greased the inside of the mould with silicone grease, put the copper tube in (being careful not to get grease on it), mixed up 12 g of JB, and pasted it in.<br />
<br />
<br clear="all"><br />
<br />
== Assembly and testing ==<br />
<br />
[[image:GranuleExtruder-finished-device-small.jpg|thumb]]<br />
<br />
I wound two 8-ohm lengths of nichrome heater wire round the barrel and JBed them on, together with a thermistor.<br />
<br />
I had a design for a worm-drive driven by the standard geared motor that we use, so I fitted that to the top. I taped on some more acetate sheet to form a hopper for the granules.<br />
<br />
All this just plugged into a completely standard and unmodified [[DarwinExtruderController_1_2|RepRap Extruder Controller]], though I could only use one coil as the TIP110 heater driver maxed out at 2A. To run both coils in parallel would need a meatier Darlington or a MOSFET. <br />
<br />
<br clear="all"><br />
<br />
[[image:GranuleExtruder-working-closeup-small.jpg|thumb]]<br />
<br />
I insulated the barrel with a snip of fiberglass roof lagging, then ran [[RepRapOneDarwinThermoplastExtruder#Calibration|Simon's extruder profile program]] on it to find the relationship between the power put in and the temperature at which it stabilised.<br />
<br />
Then I poured in some polycaprolactone granules, set the temperature to 70<sup>o</sup>C, and waited for it to warm up.<br />
<br />
I turned the motor on and, after waiting quite a while for the helix and then the nozzle to fill up, the device began to extrude :-)<br />
<br />
<br clear="all"><br />
== Results and conclusions ==<br />
<br />
[[image:GranuleExtruder-clogged-small.jpg|thumb]]<br />
<br />
After more of a while, the extrusion stopped. I switched everything off and, after it had cooled down, found the problem. Too much heat had conducted up the screw and started to melt the polycaprolactone granules above the entrance to the barrel (right). This stopped granules being entrained by the screw.<br />
<br />
In total, the problems were:<br />
<br />
* Too much heat conducted up the screw,<br />
* The JB-Weld block was too small - the things attached to it got too hot, and<br />
* The worm drive was too slow.<br />
<br />
Good bits were:<br />
<br />
* It worked!<br />
* It was easy to make, and<br />
* It used completely standard RepRap electronics and software.<br />
<br />
The next one will:<br />
<br />
* Have a moulded JB-Weld screw,<br />
* Have a better thermal barrier between the top of the barrel and the rest of the machine, and<br />
* Lose the worm drive - direct would be better and simpler.<br />
<br />
<br />
<br />
-- Main.AdrianBowyer - 09 Sep 2007<br />
<br />
<br />
RepRap: Blog [http://blog.reprap.org/2008/12/well-that-didnt-work.html "Well. That didn't work..."]<br />
2008-12-19 describes further improvements<br />
(and the comments have several tantalizing possibilities).<br />
<br />
== Related projects ==<br />
* [[Better Granular Extruder Deutsch]]<br />
* [[Better Granular Extruder]]<br />
* [[Web4Deb extruder]]<br />
<br />
[[Category:Twiki]]</div>Nathanbhttps://reprap.org/mediawiki/index.php?title=SAE_Prusa_Mendel&diff=34160SAE Prusa Mendel2011-05-20T13:58:48Z<p>Nathanb: /* Aquiring Drive Belts */</p>
<hr />
<div>{{Development:Stub}}<br />
{{Development<br />
|name = Prusa Mendel<br />
|status = working<br />
|image = assembled-prusa-mendel.jpg<br />
|description = SAE Prusa Mendel is an offshoot of [[Prusa Mendel]].<br />
|license = [[GPL]]<br />
|author = Prusajr<br />
|reprap = Mendel<br />
|categories = [[:Category:Mendel Variations|Mendel Variations]][[Category:Mendel Variations]],<br />
[[Category:Non-Metric]] [[:Category:Non-Metric|SAE]]<br />
}}<br />
<br />
SAE Prusa mendel is an offshoot of the [[Prusa Mendel]], only difference currently is it only uses 1 screw size (SAE #6 instead of metric M3 and M4), and only uses 608 bearings. [[User:Spacexula|Spacexula]] did the conversion, and is currently trying to maintain this branch.<br />
<br />
<videoflash>tyVM3-v84I0</videoflash><br />
<br/><br />
__TOC__<br />
<div style="clear:both"></div><br />
<br />
== Development ==<br />
The Prusa Mendel is on hosted github: http://github.com/prusajr/PrusaMendel<br />
<br />
You can follow the changes on [https://github.com/prusajr/PrusaMendel/commits/master Changelog]<br />
<br />
You can sign up for github for free and fork the project to begin working on it.<br />
<br />
=== History ===<br />
* http://blog.reprap.org/2010/10/story-of-simpler-mendel-pla-bushings.html<br />
<br />
== Bill of Materials ==<br />
The SAE Prusa Mendel BOM is slightly different than Metric Prusa Mendel, but as close as possible.<br />
<br />
(in works, not complete yet)<br />
<br />
=== Printed Parts ===<br />
{| class="wikitable sortable" border="1"<br />
|-<br />
! scope="col" | Quantity<br />
! scope="col" | Description<br />
! scope="col" | Type<br />
! scope="col" class="unsortable" | Comments<br />
! scope="col" class="unsortable" | Diagram<br />
|-<br />
| 2 || coupling || RP || || [[File:Pm-coupler.jpg|50px]]<br />
|-<br />
| 3 || endstop-holder || RP || ||<br />
|-<br />
| 1 || x-carriage || RP || || [[File:Pm-x-cariage.jpg|50px]]<br />
|-<br />
| 1 || x-end-idler || RP || || [[File:Pm-x-idler.jpg|50px]]<br />
|-<br />
| 1 || x-end-motor || RP || || [[File:Pm-x-motor.jpg|50px]]<br />
|-<br />
| 1 || y-motor-bracket || RP || || [[File:Pm-y-motor-bracket.jpg|50px]]<br />
|-<br />
| 2 || z-motor-mount || RP || || [[File:Pm-z-motor.jpg|50px]]<br />
|-<br />
| 4 || belt-clamp || RP || || [[File:Pm-belt-clamp.jpg|50px]]<br />
|-<br />
| 8 || bar-clamp || RP || || [[File:Pm-bar-clamp.jpg|50px]]<br />
|-<br />
| 2 || rod-clamp || RP || || [[File:Pm-rod-clamp.jpg|50px]]<br />
|-<br />
| 2 || pulley || RP || || [[File:Pm-pulley.jpg|50px]]<br />
|-<br />
| 4 || frame-vertex with foot || RP || || [[File:Pm-frame-vertex-foot.jpg|50px]]<br />
|-<br />
| 2 || frame-vertex || RP || || [[File:Pm-frame-vertex-footless.jpg|50px]]<br />
|-<br />
| 12 || pla-bushing || RP-PLA || check your build file, the file makes either 4 or 12 || [[File:Pm-bushings.jpg|50px]]<br />
|}<br />
<br />
=== Non-Printed Parts ("vitamins") ===<br />
<br />
{| class="wikitable sortable" border="1"<br />
|+Required<br />
|-<br />
! scope="col" | Quantity<br />
! scope="col" | Description<br />
! scope="col" | Type<br />
! scope="col" class="unsortable" | Comments<br />
! scope="col" class="unsortable" | Part Numbers<br />
|-<br />
| 1 box (100)<br />
| 5/16" nuts<br />
| Fastener<br />
|<br />
| 95462A030 (1 box)<br />
|-<br />
| 1 box (100)<br />
| 5/16" washers<br />
| Fastener<br />
|<br />
| 90126A030 (1 box)<br />
|-<br />
| 1 box (100)<br />
| #6 washers<br />
| Fastener<br />
|<br />
| 90126A509 (1 box)<br />
|-<br />
| 1 box (100)<br />
| #6 1" screws<br />
| Fastener<br />
|<br />
| 90272A153 (1 box)<br />
|-<br />
| 1 box (100)<br />
| #6 nylock nuts<br />
| Fastener<br />
|<br />
| 90631A007 (1 box)<br />
|-<br />
| 1 box (100)<br />
| 5/16" Fender Washers<br />
| Fastener<br />
| You only need 6<br />
| 91090A111 (1 box)<br />
|-<br />
| 3<br />
| 608 Bearing Sets<br />
| Bearings<br />
|<br />
| (any 608 sealed bearing such as: http://www.thebigbearingstore.com/servlet/the-1031/608-dsh-2RS-608-dsh-ZZ-Radial-Ball/Detail) - 5972K91 is not a good choice as it is unsealed & $$$$<br />
|-<br />
| 1 box (100)<br />
| M3x10 bolt<br />
| Fastener<br />
| Motor Mounting<br />
| 92005A120 (?)<br />
|-<br />
| 2280 mm ~90"/7.5'<br />
| Neoprene Belting .200" Pitch, 1/4"<br />
| Drive Belt<br />
| This is '''not''' compatible with the T5 pulley in the git repo (see below)<br />
| 7959K24 (?)<br />
|-<br />
| 1<br />
| 9 foot smooth rod (NOT GALVANIZED)<br />
| <br />
| X,Y,Z bars<br />
| 8890K41 (3 foot sections, $4.05, 0.005"/foot straight)<br />
8893K41 (3 foot sections, $4.30, no straightness spec, one arrived bent)<br />
<br />
8888K41 (3 foot sections, $8.53, 0.005"/foot straight)<br />
<br />
All are +/-0.0005" and may bind on bronze bushings if oversize<br />
<br />
These are all ground rods (typically called "Drill Rod" in the US and "Silver Steel" in some other parts of the world), and all make excellent choices for your XYZ rods. The more expensive ones offer no practical benefit, but are listed in case the first option is out of stock. You can also substitute stainless steel rods, but they are generally not quite as smooth, and they will usually be more expensive. Plain steel and galvanized rods are poor choices do to the rough surface finish.<br />
<br />
|-<br />
| 1<br />
| 21 foot threaded rod<br />
| Frame<br />
|<br />
| 98841A030 (3 foot sections)<br />
|-<br />
| 4<br />
| 7/16" x ~1" springs<br />
| <br />
| optional, or from a spring loaded pen<br />
|<br />
|-<br />
| 1<br />
| [[Wade's Geared Extruder]]<br />
|<br />
| (or any other compatible extruder)<br />
|<br />
|-<br />
| 5<br />
| Nema 17 Stepper Motors<br />
|<br />
|<br />
|<br />
|-<br />
| 1<br />
| Standard Mendel electronics + endstops<br />
|<br />
| This can be [[RAMPS]], [[Pololu Electronics]], [[Generation_6_Electronics|Gen6]], [[Generation_3_Electronics|Gen3]], or anything else compatible<br />
|<br />
|}<br />
<br />
==== Aquiring Drive Belts ====<br />
(No need to split belts, no continuous Z axis belt)<br />
Belt 1- 870mm ~34.25"/ 2.8'<br />
Belt 2- 1410mm ~55.5"/ 4.7'<br />
<br />
The 0.2" pitch XL belts are very close in pitch to the T5 metric belt (5mm = 0.197") so the XL belt will run on a T5 pulley. The ratio of tooth to gap size is different and the T5 pulley (such as the one in the Prusa git repo) will have backlash as each time the pulley reverses the small XL tooth will slide in the larger T5 gap of the pulley before it starts moving. If you use XL belts print an XL pulley such as the one [http://www.thingiverse.com/thing:7454 on Thingiverse] (If you use this pulley, you will need some M3 nuts and M3 grub/set screws as SAE screws/nuts will be too big) or [https://github.com/MakerGear/MakerGear-Prusa-Mendel MakerGear Prusa github repository].<br />
<br />
You will need to adjust the <tt>X/Y_STEPS_PER_MM</tt> in your firmware to match XL pitch.<br />
<br />
==== Acquiring Smooth Rod ====<br />
<br />
Do not get Galvanized Rods, they are much rougher. Drill rod (also called tool steel or silver rod) is smoother and made to tighter tolerances. Look for a straightness tolerance if mail-ordering (e.g. 0.005"/foot) or order extra and be prepared to cut around bent sections.<br />
<br />
If you want to use bronze (also called brass or oilite) bushings in holders note that even drill rod spec is +/-0.005 while bushings are +0.0010/-0, so an oversized rod will not work smoothly with a bushing. Precision ground rods are +0/-0.0003 and work much better with bushings. '''8mm precision ground rod is cheaper than 5/16"''' so going with an 8mm smooth-rod system makes sense with bronze bushings. [http://www.vxb.com/page/bearings/CTGY/8mmLinearMotionSystems VXB Bearings] has 8mm rods in 495mm, 406mm and 330mm which are suitable.<br />
<br />
Use Standard Mendel lengths for cutting 420x2 406x2 and 330x2.<br />
<br />
The smooth rod is cut into varying lengths, therefore, its common to acquire in 3 foot sections.<br />
<br />
If you have 3x 3ft smooth rod 8893K41 <br />
Rod1: 420mm,330mm 16.5",13"<br />
Rod2: 420mm,330mm 16.5",13"<br />
Rod3: 406mm,406mm 16",16"<br />
<br />
==== Aquiring Threaded Rod ====<br />
The rods should be cut (by you) to the following sizes, in mm (the original sizes) or in inches for the SAE purist who wants to avoid little bits at the end.<br />
<br />
To the right are "close enough" lengths in inches that will minimize number of cuts. '''(Note: Cut one of the threaded rod sets listed below, not all!)'''<br />
<br />
If you have '''3 ft''' lengths,<br />
3' Rod1: 440mm,440mm 18",18"<br />
3' Rod2: 440mm,370mm,50mm 18",15",2"<br />
3' Rod3: 370mm,370mm 15",15"<br />
3' Rod4: 370mm,294mm,210mm 15",12",9"<br />
3' Rod5: 370mm,294mm,210mm 15",12",9"<br />
3' Rod6: 294mm,294mm 12",12"<br />
3' Rod7: 370mm 15"<br />
<br />
At Lowes in some towns you can get '''4 ft''' length allowing you to combine Rod7 and 3 into 1, 4 foot rod, or you could use 3 four foot lengths and 2 three foot lengths for a less wasteful (and probably cheaper) set as follows: <br />
3' Rod1: 440mm,440mm 18",18"<br />
3' Rod2: 440mm,370mm,50mm 18",15",2"<br />
4' Rod3: 370mm,370mm 15",15",15"<br />
4' Rod4: 370mm,294mm,210mm 15",12",9",12"<br />
4' Rod5: 370mm,294mm,210mm 15",12",9",12"<br />
<br />
At Menards or Ace Hardware you can get '''6 ft''' rods. You can use three of them as follows:<br />
6' Rod1: 440mm,440mm,440mm,370mm,50mm 18",18",18",15",2+"<br />
6' Rod2: 370mm,370mm,370mm,370mm,294mm 15",15",15",15",12"<br />
6' Rod3: 370mm,294mm,294mm,294mm,210mm,210mm 15",12",12",12",9",9" + extra<br />
<br />
==== About the Electronics ====<br />
The Prusa Mendel uses the 4 drivers in the standard Mendel electronics package to drive 5 motors by using "two steppers wired in parallel to one driver" [http://blog.reprap.org/2010/10/story-of-simpler-mendel-y-and-z-axes.html].<br />
<br />
=== Where To Purchase ===<br />
<br />
See the [[Mendel Buyers Guide]] for information on where to purchase all of the parts needed.<br />
<br />
== Printed Parts ==<br />
[[File:Prusa.jpg|right|thumbnail|300px|A printed set of Prusa Mendel parts]]<br />
=== Printing a Prusa on a Mendel ===<br />
An easier option then individually printing each part if you are printing Prusa on a RepRap Mendel is the pre-assembled build file containing the Prusa parts. With this option you only need to print the Mendel plate and the PLA bushings to get a complete Prusa Mendel:<br />
* [http://github.com/prusajr/PrusaMendel/raw/master/stl-sae/mendelplate.stl SAE Mendel Plate] (contains all printed parts except the PLA Bushings)<br />
* [http://github.com/prusajr/PrusaMendel/raw/master/stl-sae/pla-bushing.stl SAE PLA Bushing]<br />
<br />
=== Printing a Prusa on a [[Pirated CupCake|CupCake CNC]] ===<br />
There are also pre-assembled build files available to fit your [[Pirated CupCake|CupCake CNC]]'s build area (download using right click => save as)<br />
<br />
'''Note:''' <br />
* These plates are 85x95mm in size. <br />
<br />
Plates for the MakerBot (The plates have changed, these print times are no longer accurate): <br />
* [http://github.com/prusajr/PrusaMendel/raw/master/stl-sae/mbotplate1.stl SAE Makerbot Plate 1]=> 6 hrs 30 min <br />
* [http://github.com/prusajr/PrusaMendel/raw/master/stl-sae/mbotplate2.stl SAE Makerbot Plate 2]=> ~2 hrs 30 min (needs retesting)<br />
* [http://github.com/prusajr/PrusaMendel/raw/master/stl-sae/mbotplate3.stl SAE Makerbot Plate 3]=> 5 hrs 40 min<br />
* [http://github.com/prusajr/PrusaMendel/raw/master/stl-sae/mbotplate4.stl SAE Makerbot Plate 4]=> 2 hrs 30 min<br />
* [http://github.com/prusajr/PrusaMendel/raw/master/stl-sae/mbotplate5.stl SAE Makerbot Plate 5] => 1 hr 50 min<br />
<br />
=== Printing a Prusa on anything else ===<br />
Last but not least, if you have a machine that doesn't fit into any of the previous options all the .stl files necessary to print a Prusa Mendel are available on the [http://github.com/prusajr/PrusaMendel PrusaMendel Github] where you can download them and print them individually.<br />
<br />
=== Buy the printed parts ===<br />
[[Mendel_Buyers_Guide#RepRapped_Parts_Kits]]<br />
<br />
== Assembly ==<br />
Assembly of an SAE Prusa Mendel should proceed in exactly the same order as the original Prusa Mendel. Consult the [[Prusa Mendel#Assembly|Prusa Mendel Assembly Guide]] for more information.<br />
<br />
== Media ==<br />
* [http://www.youtube.com/watch?v=tyVM3-v84I0 Two printers simultaneously] - Prusa and shaper cube working side by side.<br />
* [http://www.youtube.com/watch?v=kh3S9aOMRhU Prusa homing using enstops]<br />
* [http://www.youtube.com/watch?v=S8c5fB9Ozek Prusa development overview]<br />
* [http://www.youtube.com/watch?v=0MvUD-tuOX0 Prusa Y axis stress test]<br />
* [http://www.youtube.com/watch?v=Y-pDYDnHYaQ Prusa Z axis stress test]<br />
* [http://www.youtube.com/watch?v=DNRapg2gaPg Early preview of the Prusa Mendel redesign]<br />
<br />
== See Also ==<br />
* [[PLA bushings]]<br />
* [[SAE Mendel]]<br />
* [https://spreadsheets.google.com/ccc?key=0AlT9e2O0Sex6dE5Ia1ZiaWJWQlRmRkVfakw5M3FyOEE&hl=en] MrJohn's cost breakdown<br />
<br />
== External Links ==<br />
* [http://prusadjs.cz/ Prusa's Blog]<br />
* [http://feeds.feedburner.com/Prusabuilders Prusa Builder Blog Feed]</div>Nathanb