The difference between the servo motor and the step motor
Servo motor power is generally small, precise operation, high speed braking, inertia small, suitable for closed loop control, and which is able to detect the actual position and the theory of position error, and remove. Stepping motor: to divide a circle into several steps, not accumulated errors, and generally use for open loop control. Note: step motor can also be used for servo motor
I take it very seriously, to answer the question of science, to be sure, not to mislead the questioner, and the answers of these answers are misleading Performance comparison of stepper motor and ac servo motor The step motor is a discrete motion device that is intrinsically linked to modern digital control technology. In the domestic digital control system, the application of stepping motor is very broad. With the advent of full digital communication servo system, ac servo motor is increasingly applied to digital control system. In order to adjust to the development trend of digital control, most of the motor control system is used as an actuator motor. Although the two are controlled in similar ways (pulse train and direction), there are significant differences in performance and application situations. Now compare the performance of the two.
The individual thinks the key difference is 3 points: 1, the primary difference: the servo is closed loop control, with feedback, know where to go. Step in and just do not respond, go where you don't know, unless you get to the trigger condition of the destination. 2, the accuracy is different, the servo is the storage digit precision is high, and the step forward is at one degree in time, the accuracy is not as the servo. 3, the torque is different, the servo is basically the constant torque, and the step velocity is inversely proportional to the torque.
