Prusa Mendel is simpler remix of normal Mendel. I want to use bushings instead of regular bearings, right now, my prototype is using two bearings, one for X and one for Y axis. Actual State is, that I have whole machine up and running, with my DIY PLA bushings. Its pretty smooth. <videoflash>tyVM3-v84I0</videoflash>
The Prusa Mendel is on hosted github: http://github.com/prusajr/PrusaMendel
You can sign up for github for free and fork the project to begin working on it.
Bill of Materials (without extruder)
The Prusa Mendel BOM is included in the Prusa Mendel README on GitHub here: Prusa Mendel Bill of Materials
(in works, not complete yet)
80x M8 nut Fastener 76x M8 washer Fastener 3x 608 Bearing Bearings
6x frame-vertex RP 2x coupling RP 3x endstop-holder RP 1x x-carriage RP 1x x-end-idler RP 1x x-end-motor RP 1x y-motor-bracket RP 1x y-idler RP (available on RepRap SVN) 4x y-slider-better RP Note: not verified 2x z-motor-mount RP 4x belt-clamp RP 8x bar-clamp RP 2x rod-clamp RP 2x pulley RP
3x pla-bushing RP-PLA
Guesstimate of other parts:
5x Nema 17 NEMA Stepper 6x M8x370 Stud side Studding 4x M8x294 Stud end Studding 2x M8x440 Stud top Studding 2x M8x210 Z-Leadscrew Studding 1x M8x470 Z-Stud bot. Studding 2x ~8x495 X-bar Bar 2x ~8x406 Y-bar Bar 2x ~8x330 Z-bar Bar 1x 225x225 Print bed Thick Sheet 1x 140x225 Print bot. Thick Sheet 3x ??? Optoflags Thin Sheet 20x M3x?? for motors+pul. Fastener 16x M3 washer " " Fastener 10x M3x10 for X-ends Fastener 8x M4x15 for X&Y-belts Fastener 16x M4 washer " " Fastener 8x M4 nylock " " Fastener 3x M4x?? for X&Y-bearings Fastener 3x M4 Mudwashers " " Fastener 16x M4 nylock " " Fastener 4x M4x?? for Z-Clamps Fastener 8x M4 washer " " Fastener 4x M4 nylock " " Fastener 4x M4x30 for Print bed Fastener ?x M? washer " " Fastener ?x M? nylock " " Fastener
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 3 of the PLA bushings to get a complete Prusa Mendel:
Printing a Prusa on a Makerbot
There are also pre-assembled build files available to fit your Makerbot's build area (download using right click => save as)
Note: these plates do not include the footed vertices and may vary from the standard parts list since they are not linked to them. This is a known problem and requires refactoring.
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.
This needs some work by someone familiar with Prusa, for now though you can at least use the images bellow to identify each part in the design and then try every possible combination until it works.
IF YOU FIND THE WORKING PERMUTATION OF PARTS PLEASE POST ANY AND ALL PRUSA MENDEL ASSEMBLY INFORMATION HERE.
Parallelnes of rods is ensured by the teardrop type of holes for rods plus securing bolts from bottom (there is nut bracket inside the part). By pushing the rods upside, they will self center.
I use my mod of Vik's vertexes, slimmer, same sturdy as original :-) http://www.thingiverse.com/thing:2003