Prusa Mendel/nl

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Dutch: Prusa Mendel in het Nederlands

Crystal Clear action run.png
Prusa Mendel

Release status: werkend

Als je deze machine bouwt met (imperial) fasteners, kijk dan ook naar SAE Prusa Mendel.

De Prusa Mendel kan minder. Maar wat het doet, doet het beter. Het is een 3D printer voor puristen.

  • Als je meer wilt betalen voor een merk en slechtere kwaliteit koop dan een Makerbot.
  • Als je een printer wilt hebben die het altijd doet, koop een Shapercube.
  • Als je gebruik wilt maken van lineaire lagers, modificeer de boel.
  • (Ik heb begrepen dat Prusa en Sells beide slecht toepasbaar zijn voor frees toepassingen, check this out.)

Als je wilt frezen dan is de Prusa versie minder geschikt dan de Sells Mendel als je meer wilt dan printplaten frezen.

Het doel van de Prusa is om en de simpelste en meest pure 3D printer te bouwen.

  • Het is veel eenvoudiger om te bouwen.
  • Het is veel eenvoudig om aan te passen.
  • Het is simpeler om te kopieren voor vrienden.
  • Het is veel eenvoudiger om te repareren.
  • Because of small complexity, it can be living thing. I update it all the time. It's unique feature but it should be standard. We are living in feature, we don't care if it's a bit different every time; our printer will print it in same time ;-)

Prusa Mendel is the Ford Model T of 3D printers.

The Prusa Mendel is a simpler remix of the original Mendel. It uses bushings instead of regular bearings. The current version uses three 608 bearings in total, one for the X axis and two for the Y axis. The 624 bearings are gone altogether. I have the entire machine up and running, with printed PLA bushings. It's pretty smooth.

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Ontwikkeling

De ontwikkelingen van de Prusa Mendel zijn te vinden op de website: github: http://github.com/prusajr/PrusaMendel.

Veranderingen aan het model zijn te vinden in de Changelog.

Je kan je gratis registeren op de website van github en een aftakking van het project maken om je eigen ontwikkelingen te kunnen beschrijven.

Geschiedenis

Onderdelen lijst

Te printen onderdelen

Hoeveelheid Beschrijving Type Opmerkingen Diagram
2 coupling RP Pm-coupler.jpg
3 endstop-holder RP Pm-endstop-holder.png
1 x-carriage RP Pm-x-cariage.jpg
1 x-end-idler RP Pm-x-idler.jpg
1 x-end-motor RP Pm-x-motor.jpg
1 y-motor-bracket RP Pm-y-motor-bracket.jpg
2 z-motor-mount RP Pm-z-motor.jpg
4 belt-clamp RP Pm-belt-clamp.jpg
8 bar-clamp RP Pm-bar-clamp.jpg
2 rod-clamp RP Pm-rod-clamp.jpg
2 pulley RP Pm-pulley.jpg
4 frame-vertex with foot RP Pm-frame-vertex-foot.jpg
2 frame-vertex RP Pm-frame-vertex-footless.jpg
12 pla-bushing RP-PLA check your build file, the file makes either 4 or 12 Pm-bushings.jpg

Niet-Printbare Onderdelen ("vitamins")

Note that additional parts are required for the extruder, although some extruder parts are included in the table below.

Required
Quantity Description Type Comments
83 M8 nut Fastener Buy a 100-pack to be on the safe side.
93 M8 washer Fastener Buy a 100-pack to be on the safe side.
6 M8×30 mudguard / fender washer Fastener
2 M4×20 bolt Fastener
2 M4 nut Fastener
2 M4 washer Fastener
22 M3×10 bolt Fastener
16 M3×25 bolt Fastener Or eight M3×25 bolt plus eight M3x20 bolts. The M3x25 bolts are too long for the recent Prusa z-motor-holder and rod-clamp, and also for the Z motor couplings. See Section 8, steps 4 and 13 for details.
4 M3×40 bolt Fastener
70 M3 washer Fastener
40 M3 nut Fastener 8 optionally locknut / stop nut / nyloc
2 M3 grub screw / set screw Fastener M3x8 seems about ideal but anything 6mm or longer should do
3 608 roller skate / inline skate / skateboard bearing Bearings
4 ballpoint pen springs Spring To fit over M3 bolts. Ballpoint pens are a common, cheap source of suitable springs. They are about 25mm long and compress to about 10mm.
6 M8×370mm Threaded rod 3 per side
4 M8×294mm Threaded rod front / rear
3 M8×440mm Threaded rod top / bottom
2 M8×210mm Threaded rod Z-leadscrew
1 M8×50mm Threaded rod or M8x30 or longer bolt for X idler. Take care: if the bolt is too long, it may not be threaded along a sufficient length
2 8mm×495mm Smooth rod X-bar (consensus seems to be that this is too long, and 420mm might be a better length, but this still requires confirmation from a finished builder. [As a "finished builder" I can confirm 420mm would be better.])
2 8mm×406mm Smooth rod Y-bar
2 8mm×350mm Smooth rod Z-bar
1 225mm×225mm print top plate Thick Sheet
1 140mm×225mm print bottom plate Thick Sheet
1 840mm×5mm T5 pitch timing belt Belt
1 1380mm×5mm T5 pitch timing belt Belt
5 NEMA 17 bipolar stepper motor Stepper Be sure to get ones with ~20mm of shaft length. Shorter shafts require modifications to the X pulley assembly and Z motor couplers. One of the five motors, for use with the extruder, should be capable of creating a holding torque of at least 40Ncm.
50 small cable binder / ziptie Misc
1 Wade's Geared Extruder for 1.75mm filament RepRap Universal Mini Extruder; or any other compatible extruder for either
1 Electronics + endstops This can be RAMPS, Pololu Electronics, Gen6, Gen7, Gen3, or anything else compatible. Endstops are either optical switches or microswitches, three of each.
Optional
Quantity Description Type Comments
3 30mm×10mm Optoflags Thin Sheet if using opto endstops
2 8mm ID spring Spring to eliminate backlash in the z axis
1 object with precisely 290mm length for frame alignment
1 object with precisely 234mm length for frame alignment

You can combine the latter two by having a piece of thick sheet with dimensions 290mm×234mm. Make sure to mark which side is which.

When cutting the threaded rods from 1m lengths, you will need 6x1m pieces (or 5x1m pieces and 1x50cm piece). Cut them as follows: 

 Rod 1: 370mm, 370mm, 210mm, ~50mm (The last piece will end up somewhat shorter than 50mm. Use it for your idler. Alternatively, an M8x30 or longer bolt can be used.)
 Rod 2: 370mm, 370mm, 210mm, ~50mm
 Rod 3: 370mm, 294mm, 294mm, ~42mm
 Rod 4: 370mm, 294mm, 294mm, ~42mm
 Rod 5: 440mm, 440mm, ~120mm
 Rod 6: 440mm

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" [1].

Where To Purchase

See the Mendel Buyers Guide for information on where to purchase all of the parts needed.

Printing the Parts

A printed set of Prusa Mendel parts

Printing a Prusa on a Mendel

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:

Printing a Prusa on a CupCake CNC

There are also pre-assembled build files available to fit your CupCake CNC's build area (download using right click => save as)

Note:

  • These plates are 85x95mm in size.

Plates for the MakerBot (the plates have changed, these print times are no longer accurate):

Printing a Prusa on anything else

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 PrusaMendel Github where you can download them and print them individually.

Buy the printed parts

Mendel_Buyers_Guide#RepRapped_Parts_Kits

Assembly

Assembly instructions >> Prusa Mendel Assembly.

Media

Prusa Improvements/Hacks

  • Rob's Auto-centering shaft coupler - designed to reduce shaft/motor vibrations (print 2/replaces 2x coupler). May require widening the openings on the z motor mounts to allow the rotation of the zip tie. Use a zip tie gun to get maximum compression on the coupling.

See Also

External Links

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