Ender Extruder Knob w/Gear Retention Sleeve

thingiverse

I was using the original knob without issue until I swapped out my extruder gear. After that, I didn't tighten the set screws firmly enough, which became apparent later that night when they backed out and the knob fell down the motor shaft. I had avoided drilling out the screws due to stripped heads, so I applied less torque than necessary. Still, it seemed like the screws shouldn't have loosened completely. Considering this, I thought about using super glue on the screws to keep them in place - a simple solution that would work flawlessly. Unfortunately, I couldn't find my super glue anywhere, nor could I locate threadlocker. Then it hit me: why not just print a custom solution? So, I remixed the original knob and added a sleeve that wraps around the flat part of the extruder gear where the set screws go in to help keep them secure. Bingo bango! Here's my creation. https://cad.onshape.com/documents/02216bfa44512def337202f3/w/d097b4cc39b7b1e172752703/e/1c5b4c0f880f199e07e59940 I remixed it by importing the STL for the original knob into Onshape, which I didn't know was possible. To do this, you can simply import the STL and then add shapes adjacent to and overlapping with it in Onshape. You can't edit the mesh directly within Onshape, but you can select the entire model, including the imported sketch, and export it as an STL that prints perfectly fine.