This is a simple project for me. I want to take a rotary table which I have only used 3 times in the 5 years I have owned it and turn it into a lapping machine. It will have a ground plate on top with an adhesive sand paper disc spinning slowly and a fence to keep the parts in place.

The part I am trying to figure out is a motor. I would like it to be about the size of a stepper motor (nema 23) and just plug into the wall and start turning at a slow rpm. I do have extra stepper motors, but I don't know how to make them spin by themselves without some type of mach software. I can follow instructions too, so if someone has a way to make a stepper turn to a specific rpm (that I dont yet know) and is simple to either make, or cheaper to buy, then I am all ears.