Paste Extruder
Description
Paste extruder, based distantly on RichRap's Universal Paste Extruder https://www.thingiverse.com/thing:20733 (CC-A). Fits on his Quick-Fit X Carriage https://www.thingiverse.com/thing:19590 (CC-A), which I've adapted into a platform for the Snappy 3 (see https://github.com/Erhannis/quickfit ). Uses my OpenSCAD translation of one of GearDownForWhat's gearboxes, and like...just, a bunch of pieces from all over. The snap-in joiners - I think from BOSL, at some level? The gear design - GearDownForWhat The gear teeth - janssen86 The attachment plate - hexdoll If you want more details, follow the dependency links in get_deps.sh Git repo at https://github.com/Erhannis/ceramic_extruder See the scad file for details on how to print it, etc. (Everything with a gear on it should be printed at -0.08 horizontal expansion, -0.3 initial layer horizontal expansion. That's virtually the only thing that matters....probably. BUT I usually printed at 0.15 layer height, 0.4 nozzle. PLA.) Do note that half of the gearbox needs to be printed oversize - see the comment for "Gearbox gear sheath" in ceramic_extruder.scad. It was designed to be as fully printable as I could make it, because I can't stand long 3rd-party parts lists. You'll need a NEMA 17 motor, but you can probably use the one on your printer. You'll also need a 10 ml syringe. I used a luer-lock syringe with the widest blunt needle they gave me; https://www.aliexpress.com/item/32617742465.html and also a set of multiple blunt needle tips - I think my tests were with 14 gauge needles. You'll also need a printer to mount it on - see the first paragraph above. It was designed to extrude ceramic. I can't find my notes on what ratio worked best, but I think 10 parts kaolin to 4 parts water, by volume, worked. Experiment if you have problems. Video at https://www.youtube.com/watch?v=6ErWMR7DQpo My hope is to be able to print ceramic molds for casting metal - tests so far have met with half-success; the metal doesn't tend to conform to the mold, etc. My work in this is released into the public domain. Go forth and use it for good! Fix the world! -Erhannis
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