I've put a video on Youtube showing my conversion of a standard dividing head to digital operation. I removed the dividing handle and quadarant, as well as the divisions disk. I added a stepper motor and 3:1 reduction, with the normal worm drive of 40:1 that 120:1. This is a Micro Stepper drive so 1 revolution is 25,000cpr. Multiply that times 120= 3,000,000cpr. When the number of divisions is inputted, the program divides the 3M by that number, yielding the number of steps for each step on the dividing head. There is a limit switch set as a trigger on the slide, near the end of the return travel, the trigger tells the controller to advance the stepper the required steps.
RP240 display is used, as they are available on internet for $100-200. No need to built one. The Extended Basic programming is not the tough to learn, and that controls the drive and display unit.
The slide came from another purchase, This one has double roller bearing slides. The foil was only temporary, I've not yet installed rear covers to keep out the chips.