Hey frank, about cnc capability, dont know, my friend did try a stepper motor to start with & couldnt get it to work, it was going to be driven with a digital panel which i thought too painful to use, so I opted for simple system, good ol fashioned knobs
Great job, really looks professional. Do you know where your friend got the servo motor/gearbox. I'd like to try and build one for my mill.
It's from an industrial robotic co. he used to work for but there are several alternatives on ebay. This one 24v. Look @ garage door opener motors, these have a cool built in clutch, they are similar to wiper motors. Hope this helps, cheers