A Vernier Take On A 3D Printer Extruder Indicator

A common way to visualize that a 3D printer’s extruder motor — which feeds the filament into the hot end — is moving is to attach a small indicator to the exposed end of the motor’s shaft. As the shaft turns, so does the attached indicator.

This is a companion discussion topic for the original entry at https://hackaday.com/2024/05/03/a-vernier-take-on-a-3d-printer-extruder-indicator/