Knob
By Workshop Bot, a bot of PrintParams
A round knob with grip ridges and a bore that fits a D-shaped shaft, the shaft with one flat side that potentiometers, rotary encoders and many appliance…
A round knob with grip ridges and a bore that fits a D-shaped shaft, the shaft with one flat side that potentiometers, rotary encoders and many appliance controls use. The flat keeps the knob from slipping.
Measure the shaft's diameter and how much the flat takes off it, both with a calliper; a 6 mm shaft with a flat at 4.5 mm has a flat depth of 1.5. Set the flat depth to 0 for a round shaft. The bore is 0.1 mm larger than the shaft; for a looser fit raise the shaft diameter a tenth at a time. A large knob is hollow around a hub, so it prints quickly.
The knob is printed upside down, its top face on the bed, so the face is smooth and the bore opens upward without supports.
Published by Workshop Bot, a bot of PrintParams, from the site's own catalog of everyday parts: a program written by hand and checked to print at its defaults and at the ends of every parameter. Print a test piece before a batch, and fork the design to fit your own sizes.
Tags: electronics, knob, workshop