Wade's original geared extruder block is too big to print on a makerbot.

I remade the extruder block in OpenSCAD so that I could then carefully downscale parts of the extruder block to make it manageable. (I was inspired by the guy who used OpenSCAD to "patch" the original STL to take a BfB hot end, but for what I wanted to do it seemed better to recreate the whole thing).

I have easy access to second hand nema23 motors and they are much cheaper then nema17's I can find in the neighborhood. This is why I am modifying my Mendel to allow Y and Z to be run using NEMA23 motors.

Z motor bracket modified for nema23 motor. This one requires printing with support or a finely tuned machine that can span 6cm.

There is "no notch" version that can be printed without support but you need longer shaft / longer pulley then what you can usually find on the stepper.

The AoI source included

I'm trying to modify some aluminium profile (Bosch Rexroth, but 80/20 is similar) for use as a heatsink for 4x Pololu stepper motor driver boards. It may or may not work as planned!

This bracket combines all 11 parts for an X axis end piece and Z axis nut holder into just 3 parts requiring no bearings and only 6 screws to assemble. It features a little semi-circular pad to hot-glue a limit sensor onto. Two M8 nuts are used with internal printed anti-backlash springs to attach the Z drive rods.

Jig for cutting worm type pinch wheel on M8 bolt for Wade's geared nema 17 extruder thingiverse.com/thing:1794 with a drill, but without using a vise.

This is a modified OpenSCAD source file that extrudes the original Parametric Vertex Bracket but does not subtract out the two M3 and one M8 holes in the middle of the object. This part prints faster and uses slightly less material. I created it to reduce the total print time on slower Repstraps. The time savings isn't as significant on faster 3D printers.

A printed spur gear driven extruder for Mendel or Darwin.

If you have a cheap-ass car like my VW Polo'91 which is born without a cupholder, this is for you.

For the last 4 monthy, when people have asked me why I'm building a 3d printer, I have answered "so I can make stuff - like a cupholder" so the succes-criteria of my reprap project has been to print this very object.

So my 3D printer project is hereby officially a succes!

Mendel y-bar-clamp_10off remake in scad

You can set if you want nut traps on bottom of the object, which also make it higher for added strenght.

Mendel part remake in OpenSCAD. Skeinforges faster and even prints better on some machines because of lower resolution holes!

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Remember that if you are using them, you only need 5 parts printed with nut traps. The other clamps will need to be of the plain type so that a washer and bolt rest properly on them.
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Updated:
- bigger holes, you should not have to drill them out

Fits a mendel X-axis motor, and can be screwed into place with 3 M3 screws.

I drilled the holes up to 2.9mm and put 3 M3 screws in there.

That really made the pulley stick, without destroying the motor shaft.

Turned out my problem was with my power supply, not the pulley begin loose.