SAE Prusa Mendel

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Prusa Mendel

Release status: working

Assembled-prusa-mendel.jpg
Description
SAE Prusa Mendel is an offshoot of Prusa Mendel.
License
Author
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Based-on
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CAD Models
External Link


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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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

The SAE Prusa Mendel BOM is slightly different than Metric Prusa Mendel, but as close as possible.

(in works, not complete yet)

Printed Parts

Quantity Description Type Comments Diagram
2 coupling RP Pm-coupler.jpg
3 endstop-holder RP
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

Non-Printed Parts ("vitamins")

1 box (100) 5/16" nuts  95462A030 1
1 box (100) 5/16" washers 90126A030 1
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) 5/16" Fender Washer  91090A111 1
3x 608 Bearing  5972K91
1 box (100)  M3x10 bolt  92005A120 (Motor Mounting)
2280 mm ~90"/ 7.5' Neoprene Belting .200" Pitch, 1/4" 7959K24 1 (No need to split belts, no continuous Z axis belt)
  Belt 1- 870mm ~34.25"/ 2.8'
  Belt 2- 1410mm ~55.5"/ 4.7'
3x 3ft smooth rod 8893K41 (Do not get Galvanized Rods, they are much rougher)
  (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"  495mm seems too long on my build, try 5-7 cm shorter [-Bryan]
       Rod2: 495mm,330mm                 19.5",13"
       Rod3: 406mm,406mm                 16",16"
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.
   (Note: Cut one of the threaded rod sets listed below, not all!)
       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: 
       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"
   At my local Menards or Ace Hardware 6 ft rods are cheaper than McMasterCarr (or anywhere else).  Get three of them:
       6' Rod1: 440mm,440mm,440mm,370mm,50mm         18",18",18",15",2+"
       6' Rod2: 370mm,370mm,370mm,370mm,294mm        15",15",15",15",12"
       6' Rod3: 370mm,294mm,294mm,294mm,210mm,210mm  15",12",12",12",9",9" + extra


4x 7/16" x ~1" springs (optional, or from a spring loaded pen)
1x Wade's Geared Extruder (or any other compatible extruder)
5x Nema 17                NEMA Stepper
1x standard Mendel electronics + endstops. This can be RAMPS,Pololu Electronics,Gen6,Gen3,or anything else compatible

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.

Printed 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 of an SAE Prusa Mendel should proceed in exactly the same order as the original Prusa Mendel. Consult the Prusa Mendel Assembly Guide for more information.

Media

See Also

External Links