Prusa i3 Mk3 Control Knob

As I was getting annoyed with the original control knob with the protrusion on it I designed my own.

I generally find this easier to work with as it scrolls easier without the protrusion interfering. I also changed the fitting geometry somewhat so you don't get the idea you're pushing the encoder through the PCB. The design has a 60 degree entry chamfer that aids fitting. Still grips nicely though.

I printed this in PETG as that's what Prusa uses. Clearly have some tuning to do there so apologies for the poor quality in the photo.

This control knob is a bit higher than the original, 9mm versus 7mm. I may design one that's the original height as it doesn't feel it needs the extra few millimetres to grip it with your fingers. Feel free to let me know what you think.

Happy printing/scrolling :)

Print Settings

Printer Brand:

Prusa

Printer:

i3 MK3

Rafts:

No

Supports:

No

Resolution:

.15mm

Infill:

20%

Notes:

Please rotate the part in your slicer to make the larger diameter flat face down.

Nothing difficult to print here. Steepest internal gradient is 60 degrees used in the fitting chamfer for the encoder shaft.

I used PETG as that's what Prusa uses but PLA will work fine in this application.