These are for Prusa printers with the color LCD screen.

The knob on my (upgraded from Mk3s) Prusa Mk3.5 works fine, but I thought it would be fun to try some other designs. Also, these print quickly, so it was an opportunity to try out my upgrade.

When putting the knob on the shaft, be sure to align the flat on the shaft with the internal flat on the knob.

Note that in the picture of six knobs, the first knob on the left is the original Prusa knob. One of my knob designs is very similar, but the grooves on the side of the knob are deeper to make it “grippier.”

Print Instructions

Print in PETG using the 3mf files provided, otherwise :

• print top end down
• 0.2mm layer height
• 2 perimeters
• 0% infill
• bottom fill patter : Concentric

Note that the 3mf files are for two-color printing via filament switching.

CAD

The OnShape 3D CAD files for this are here :

https://cad.onshape.com/documents/a7fae85c504194dcb7f1279a/w/6936f900359868ec4280668c/e/6b35e80e0ca9e702b56a4643?renderMode=0&uiState=65ecdd80e9638763506748af