Summary

Direct Drive Extruder, for use with MK7 Drive gear. For use with 1.75mm Filament and the MakerGear Hot End.

My First Post.

Instructions

You will need the following Drive Gear:
http://store.makerbot.com/mk7-drive-gear.html

another source
http://twelvepro.com/index.php?route=product/product&product_id=51

and the following HotEnd:
http://www.makergear.com/products/operators-pack

Pick the V3 GrooveMount for 1.75mm fiament with the .35mm Nozzle.

Thanks to Mark Fuller for the original design this is based on.

I have included the Inventor Fusion 2013 source file.

NOTE: Make sure you print this in ABS, as the stepper motor will get hot, and of course, the hotend will get hot too.

I recommend using Slic3r 0.8.4 or higher to print this with the following key settings:
Perimeters: 3
Solid Layers: 3
Fill Density: .45
Layer height .26
Use support material with overhang of 95.

Print with Motor attachment plate facing the build platform.

MK7 Type Extruder - Heavy Duty