arduino indexer

[Workshopshed]

Nelson, looking that this design it appears to be a stepper motor and Arduino. So the wiring is straight forward. There are many tutorials for doing that around the web. Buttons are also simple and if you pick an I2C based screen that only has 2 wires and power
For gear cutting the mechanics are important, you need to ensure no play in your chuck and minimal backlash in the gears.