E3D Hobb Goblin GEEETECH extruder flexible filament guide

thingiverse

Because of the design of the popular after-market Geeetech MK8 extruder it's difficult to use flexible filaments such as NinjaFlex(tm). A lot of people have designed and published similar modifications, but this one stands out. This guide is specifically tailored for use with the E3D Hobb Goblin 5mm extruder gear. I prefer using it because I really like its performance. Because its smaller diameter, the filament output sits at a slight angle towards the PC4-M6 pneumatic fitting. This modification fixes this issue. (At delta X, it measures about 1.2 mm offset to the right). The original straight cut gear is larger in diameter. The original bearing has a concave surface where the filament rides on, which acts as a guide for the original gear. Parts Needed: ------------- + 1x E3D Hobb Goblin extruder gear replaces the original gear. + 1x Bearing "624ZZ" - ID: 4mm - OD: 13mm - Depth: 5mm, replaces the original bearing. + A piece of Teflon tubing with 3mm outer diameter and 2mm inner diameter. Leave it long so it goes all the way in to reach the PC4-M6 pneumatic fitting. Insert and cut to the shape of the guide on one end using a sharp, thin blade. View on Autodesk Gallery: https://gallery.autodesk.com/fusion360/projects/e3d-hobb-goblin-geeetech-extruder-flexible-filament-guide Free Source Code: http://a360.co/2w7db9I Log: + Test print 1: + Enlarged hole for tube diameter to 3.2mm, was 3.1mm. + Height reduced to 12.5mm, was 12.7mm. + Location of M3 screw / spring center distance from backplate now 6mm, was 6.35mm. + Removed logo, too small to print and causes top layer defects. + Test print 2: + Fits perfectly after a little clean-up of the holes.