Planetary gearbox

thingiverse

OpenSCAD planetary gearbox available at https://github.com/Erhannis/gearbox. This is a port of one of Gear Down For What's gearboxes, located at https://www.thingiverse.com/thing:2054378. The original work is licensed under CC/BY-SA, and I'm unsure what that makes my version. My code is otherwise MIT licensed. To get the dependencies from github, run get_deps.sh. If you're running windows, install git, create a "deps.link" folder where the gearbox scad resides, then in that folder run the "git clone" lines of the "get_deps.sh" file. OpenSCAD should be able to read gearbox.scad properly after this. The flattedShaft is simply a test crank. I didn't have anything around that fit quite like a stepper motor shaft. If anyone knows where to purchase 2.5mm radius D-shaped shafts like that, I'd be interested in purchasing some. The "long" stls are modifications for increased strength for my paste extruder (https://www.thingiverse.com/thing:4182973). Printing: I used 0.2 layer height and 20% infill with Cura's "Standard Quality" setting. However, by default it's far too tight a fit. I've discovered that Cura's "Horizontal Expansion" setting can be used as an "auto-tolerance" setting. I found between -0.08 (slightly too tight) and -0.1 (slightly too loose) to be good on my printer. Assembly: Use GDFW's instructions. The orientation of the planet gears is very important - two adjacent facing the same direction, the other two facing the opposite direction. -Erhannis Video: https://youtu.be/_YrWy0ScoSM