Summary
This is a low-cost rotary adapter for my laser engraver, made from 4mm plywood and scrap parts from other projects that I had lying around.
Instructions
Cut the parts from 4mm plywood.
I used 4 old skateboard bearings, a NEMA14 with an EasyDriver module and to make the wheels less slippery I put pieces from a latex glove on them.
For your controller settings: The EasyDriver is set to 8 microsteps/step per default and with this setting the rotary needs 5120 pulses (640 steps) per revolution.