This is a derivative of the Printruder II - Rear Breech Loading by juniortan and of course the original design by Zaggo.

For some reason the derivative feature wasn't working properly :( ...So I made it a new thing.

Here is the PNEMAtruder! The "P" is silent :D

It has all the features of the junior tan's version: http://www.thingiverse.com/thing:3178 the rear breach and gear access.

It is a direct drive stepper extruder that uses a high torque NEMA 17 in order to drive filament to extrude. Or a high torque NEMA 23

Also, an optional filament tube clamp can be attached at the top, for those with filament spindles.

This is still a work in progress, but I thought I'd put it out there for all to see and make suggestions, etc.

The center has been changed so I can't use any existing support designs.

What do you guys look for in your supports? low part counts? Easy to print? Function/Flatness? Maximum Z height? Would you want me to make laser cut supports for purchase/download? Does anyone actually read this and answer? So far, no so I'm just designing features I want.

1/12/11 I'm currently working on a revised version that axes the NEMA 17 and utilizes a NEMA 23. Most high torque NEMA 17's that I can find just don't have enough torque to get the job done. I uploaded a screenshot of the new design. None of the files are updated, yet.

6/4/11 With MBI selling the 100 in-oz NEMA 17 motor in there store you can now use the 17 design.