A simple knob that will press fit onto any 6 mm potentiometer shaft for volume, tone control etc. Should fit both splined and smooth shafts. Knob consists of two parts: outer PLA part and TPU insert for gripping the potentiometer shaft. Insert is just a press fit into the hole in the knob, but of course it can also be secured with glue.

Files provided for knob with flat or concave top, and both with or without dots (actually just a 3mm hole) to show position of knob, if nesessary. Size of the knob is 20 x 20 mm. Hole inside is 10 x 15 mm. Size of insert is 10 x 14 mm.

Creality

CR10S PRO

No

Yes

0.1

10

PLA for the knob, flexible filament like TPU for the insert.

Flat topped knob can be printed upside down, but concave top one should probably be printed right side up with support for inside the hole. I've found the support removes easily and cleanly with needle nosed pliers.

Knob uses about 1.15 meter/3 gram of filament, and takes about 45 minutes to print at 0.1 mm resolution. Insert uses about 0.26 m/1 g of filament, and takes about 11 minutes to print at 0.1 mm.

The TPU insert is just pressed into the hole in the back of the knob.