Flexy-fixed Greg's Wade's Extruder

thingiverse

This is a minor tweak to AndrewBCN's extruder to reduce the gap between the pinch and the filament channel. Too large a gap here allows flexible filament like NinjaFlex or PolyFlex to twist and push out of the extruder from the side instead of being forced down into the hot end. With this smaller opening the flexible filament does not have a chance to escape. I also made the filament guide wider on one side because the tips were too narrow to print reliably and cleanly when configured for 3mm filament. It should be wider on both sides, but I need to carve out a space for it on the extruder body for that to fit, and I haven't done that yet. This thing is managed on github. Nov 12, 2015 Update 1: The .scad file is set for 1.75mm filament by default and the .stl files are built for both 1.75mm and 3mm filament extruder configurations. I corrected the STL so the 1.75mm version guilder will lay flat on the print bed. But I have not tested the 1.75mm version myself. Let me know if you have any trouble with it. Also, I renamed the files to match this thing's name and to avoid confusion with AndrewBCN's version. How I Designed This I found the original idea for this solution in a video by Christopher Hoffman (youtube:BZSo7CT914Y) which also explains the original problem quite well. I tried to use his fix, modifying my original Wade's Greg's extruder, but I messed it up because I was using a hand drill and wasn't very precise.