I reverse engineered the stl files from DraftYeti's knob in OnShape so I could make some changes. The knob is more or less the same on the outside, with some minor tweaks, fillets and chamfers, that sort of thing.
I noticed the original, depending on how you held it to twist, had some uncomfortable sharp corners, which I promptly knocked off with a chamfer and a fillet. Additionally, the inside of the original, while faithful to the Boss knob, I'm sure, wasn't very optimised for 3D printing. I added more chamfers to that to eliminate the need for support material. The way the top round bit connected also created areas that needed support, so I changed that to remove the small pin on the bottom, such that now the body of the knob requires no support at all to print. I changed the inside to also include teeth to interface with the ridges present on potentiometers.
| main_knob.step | 439.5KB | |
| main_knob.stl | 488.9KB | |
| top.step | 13.6KB | |
| top.stl | 223.7KB |
