It is a 3 motor mill,Trionics Handyman. It is a 1988 era mill with Centroid electronics and MAE hybrid stepper motors?
My Centroid electronics contain 1 board labeled CPU3 REV 870830, one labeled HE 512C00604-001 Rev A, and three labeled Flux Capacitor Drive Rev 870312.
The motors are MAE HY 200-3450-700, which they appear to make something similar still today.
All of this is controlled with the input controls next to the display via 3 wires.
Thanks,
Dave