I just finished a nano CNC machine that I call Nanite. It has a travel of 2"X, 1.75"Y, and 2""Z. It's footprint is about 3"x4.5".
I had small DC motors coupled to the leadscrews just for fun, but my original intent was micromilling gears and parts, and tiny PCBs for nano sumo robots. I have 4 small bipolar stepper motors, but am unsure of which circuit to use for their control. I don't have any datasheets(elusive little buggers), so any info as far as deg/step, voltage, current, etc, is all guess work. At the bottom is a stock photo of one of the motors.
My question is, how simple of a circuit can i use to make this thing tick?
Any help is much appreciated.