Why did you choose stepper motor, we carries on the discussion from the following several aspects: 1, the control precision is different. Average precision of the stepper motor depends on the structure of the motor, the motor phase number and shoot number, the more its precision is higher, the market most or two phase stepper motor, precision was not high. Closed-loop stepper motor in the end of a motor with encoder to form closed-loop control, increase a certain precision. 2, different torque frequency characteristics; Ordinary stepper motor output torque increases with speed and the decrease of, because there is no closed loop current compensation, cause high torque loss is very big, the closed-loop stepper motor current closed-loop control, so that under the high speed have current compensation, maintain high torque output. 3, running performance is different; Ordinary stepper motor control for the open loop control, start frequency is too high or too much load step is easy to lose or locked-rotor phenomenon, stops frequently occur high speed overshoot phenomenon, closed-loop stepper motor as the closed loop control, drive directly to the motor encoder feedback signal sampling, internal position loop and speed loop, general won't appear step motor lose step or overshoot phenomenon, more reliable control performance. 4, different speed response performance; Ordinary stepper motor speed accelerate from 0 to work requires hundreds of milliseconds, and better acceleration performance of the ac servo system, generally only a few milliseconds, can be used for quick start-stop control occasions. Relevant product recommendations: stepper motor drives the product information: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone: