UIrobot featured Stepper Motor Controllers and Stepper Motor Drivers size only 42.3*42.3*13.5mm include parallel port stepper motor driver, serial port (RS232) and network(CAN Protocol) Stepper Motor Controller which can be directly mounted onto size 42/57/86/110mm (They are NEMA17, NEMA23, NEMA34 and NEMA42 step motors) stepper motors. Ultra-miniature size, high performance, standalone workable or as built-in control and drive unit, easy wiring and strong driving force are the unique selling point of UIM stepper motor controllers and stepper motor drivers.