Flying Extruder for Kossel Mini (Deltas)

thingiverse

Update: 3/17/2016 Added Counterweight Suspension System for the Flying Extruder to minimize additional load on the stepper motors, making it virtually weightless. Please print new_plate. This moves the suspension point at the center of gravity of the motor and is adjustable. Check out new files and video. Thanks! You will need a slightly longer Bowden tube since you will raise the extruder. Get rid of the old knob and replace it with an M3 x 25mm screw and washer, and cut a piece of rubber tubing to act as a spring to push the lever onto the filament. Flying Extruder kit for the Kossel Mini, which can also be used with any delta. See video below to see it in action. I would like to give credit to WASProject of Italy for their Suspended Bowden from which I derived the design for this Flying Extruder. http://www.wasproject.it/w/bowden-sospeso-di-wasproject/ The STL file included is for extruder drive gear with 6mm effective ID and 8mm OD (gear_radius = 0). Please change this value in the SCAD file if you have an MK8 drive gear (if 11mm OD, add 1.5 to gear_radius). DO NOT print plug.stl. It is used for the SCAD file, for "tapping" a 1/8 BSPT thread. If your fitting is different, use this https://www.thingiverse.com/thing:227192 to make a different plug. SCAD files are included for your customization. (Nema 17.scad file is from Johann's Kossel Mini files) You'll need: M3 x 16mm screws for the nipples M3 x 35mm screw for idler adjust M3 flat washer to insert in slot at back of extruder body M3 nut to insert at bottom of back of extruder body (to mate with idler adjust screw) M3 x 24mm x 3 screws for mounting motor M3 x 12mm x 2 or similar course thread screws to fix plate to body Clear epoxy to glue fitting to body Bearing 16x5x5 for idler Bolt M5 x 16mm for idler hub (A simple 5mm dia x 20mm rod will also do. I used a 5mm rivet) 3/16" ID x 100mm x 3 rubber tubing for suspending the plate to the nipples If you like it and find it useful, I'd appreciate a small tip. https://paypal.me/boksbox/1USD Printer Settings: Kossel Mini Rafts: No Supports: No Resolution: .2 Infill: 30 Notes: Use solid infill for fitting. 3 perimeters Post-Printing Instructions: Glue fitting to extruder body. Insert the fitting into the extruder body front. Parts may need some filing to fit properly. Remove fitting from body and apply some epoxy to both mating sides. Re-insert the fitting to the body. Align the filament passage holes properly before the glue sets. I used a 2mm drill bit to make sure the holes are aligned. Custom Section