My laser didn't come with a rotary, but I have this rotary. It is a four jaw 100mm with a gapless harmonic reducer gearbox 50:1 ratio. It sports a NEMA 23, 2 phase stepper. I also have a driver it's a 2M542.

Now comes the fun part. Microsteping. I have a bunch of microstep setting options from 400 to 25600. Another laser I have access to has its stepper driver set to 12800.

Any thoughts?