The DMC-30017 Pocket Motion Controller Series from Galil Motion Control (Rocklin, CA) combines a single- axis motion controller with a 6A microstepping drive, which operates a two-phase bipolar stepper motor. The drive produces 256 microsteps per full step, or 1024 steps per full cycle, resulting in 51,200 steps/rev for a standard 200-step motor. The maximum step rate generated by the controller is 3 million microsteps/second. It drives motors operating at up to 6 amps at 20 to 80 VDC. The unit measures 3.9 x 5.0 x 1.5".