Printrbot Flexible Filament Direct Drive Extruder
thingiverse
This is a modified version of the base of the Printrbot Direct-Drive extruder (http://www.thingiverse.com/thing:281015). I've altered it to be more easily printable, and to reduce the gap between the drive gear and the base to make it more ninjaflex friendly.Update 7/23/2014: I've tested this with PLA, ABS, and MatterHackers Soft PLA. It works great for all of them. I don't have any genuine NinjaFlex, so if you try it, let me know.Update 7/23/2014: Minor updates to improve fit. Instructions I suggest printing in ABS for maximum heat tolerance. 0.2mm layer height. Custom support has been included, so print without supports.
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