SAE Prusa Mendel
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Release status: working
| Description | SAE Prusa Mendel is an offshoot of Prusa Mendel.
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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. Spacexula did the conversion, and is currently trying to maintain this branch.
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Contents
Development
The Prusa Mendel is on hosted github: http://github.com/prusajr/PrusaMendel
You can follow the changes on Changelog
You can sign up for github for free and fork the project to begin working on it.
History
Bill of Materials
SAE Prusa Mendel BOM is slightly differnt than Metric Prusa Mendel, but as close as possible
(in works, not complete yet)
Printed Parts
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 2x z-motor-mount RP 4x belt-clamp RP 8x bar-clamp RP 2x rod-clamp RP 2x pulley RP
Bushings
12x pla-bushing RP-PLA or *12x brass bushings + 12x bushing holders RP any material
Guesstimate of other parts: ("vitamins")
1 box 5/16 nuts (100) 95462A030 1
1 box 1/4 washers (100) 90126A030 1 (Yes 1/4" washers fit over a 5/16 rod, and the 5/16 washers are too big for some areas of mendel.)
7x 3ft threaded rod 98841A030 7
The rods are cut (by you) to the following sizes, in original sizes in mm or for the SAE purist who wants to avoid
little bits at the end, to the left are "close enough" lengths in inches that will minimize number of cuts.
Rod1: 440mm,440mm 18",18"
Rod2: 440mm,370mm,50mm 18",15",2"
Rod3: 370mm,370mm 15",15"
Rod4: 370mm,294mm,210mm 15",12",9"
Rod5: 370mm,294mm,210mm 15",12",9"
Rod6: 294mm,294mm 12",12"
Rod7: 370mm 15"
At Lowes in my town 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:
(Note: Cut either the threaded rod set as above OR as below, but not both)
3' Rod1: 440mm,440mm 18",18"
3' Rod2: 440mm,370mm,50mm 18",15",2"
4' Rod3: 370mm,370mm 15",15",15"
4' Rod4: 370mm,294mm,210mm 15",12",9",12"
4' Rod5: 370mm,294mm,210mm 15",12",9",12"
3x 3ft smooth rod 9120K12 (Use Standard Mendel lengths for cutting 495x2 406x2 and 330x2)
These rods are also cut (by you) to the following sizes, in mm
Rod1: 495mm,330mm 19.5",13"
Rod2: 495mm,330mm 19.5",13"
Rod3: 406mm,406mm 16",16"
1 box (100) #6 washers 90126A509 1
1 box (100) #6-1" screws 90272A153 1
1 box (100) #6 nylock nut 90631A007 1
1 box (100) #6 fender washer 91090A100 1 (These are not a correct replacement for the M8 fender washers -- need 5/16" fender washers!)
4x 7/16" x ~1" springs (optional)
1x standard Mendel extruder
5x Nema 17 NEMA Stepper
1x standard Mendel electronics or Mendel alternative electronics.
(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]).
- for more info on Brass Bushings see: http://www.thingiverse.com/thing:5995
Printed 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 3 of the PLA bushings to get a complete Prusa Mendel:
- Mendel Plate (contains all printed parts except the PLA Bushings)
- PLA Bushing (you need 3)
Printing a SAE Prusa on a Makerbot
Production files uploaded to Thingiverse at [2]
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.
Assembly
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.
X-Carriage
X-End-Motor
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.
X-End-idler
Universal Bar-Clamp
Frame-vertex
I use my mod of Vik's vertexes, slimmer, same sturdy as original :-) http://www.thingiverse.com/thing:2003
Media
- Two printers simultaneously - Prusa and shaper cube working side by side.
- Prusa homing using enstops
- Prusa development overview
- Prusa Y axis stress test
- Prusa Z axis stress test
- Early preview of the Prusa Mendel redesign
