The E121AX2 is a two-phase stepper motor drive from Oriental Motor. It is an open-loop control with an output of 1.0A/Phase (2.0A peak) at 24–90V. It features a maximum speed of 4000 rpm, microstep resolutions of 1/2, 1/4, 1/8, 1/16, and 1/32 step, and a 100-300 Hz operating frequency range. This motor drive is suitable for use in a wide variety of applications including factory automation, medical equipment, packaging machinery, and CNC.