Stepper motor and servo motor

A wide variety of motors are used in many fields, including the well-known stepper motor and servo motor. However, many users do not know the major differences between the two types of motors, so they always do not know how to choose. So, what are the main differences between stepper motors and servo motors? Check it out below!

1. The control accuracy and overload capacity of stepper motor and servo motor are different

Because the accuracy of the stepper motor is usually achieved by precisely controlling the steep Angle, the stepper Angle has a variety of different subdivided gears that allow precise control. The control accuracy of AC servo motor is guaranteed by the rotary encoder at the rear end of the motor shaft, so the control accuracy of the two is different.

2. Stepper motor and servo motor have different low frequency characteristics and torque frequency characteristics

Stepper motor is prone to low-frequency vibration when running at low speed, so it is usually necessary to use damping technology to overcome the low-frequency vibration phenomenon when running at low speed. For example, add dampers to stepper motors or use subdivision techniques on drivers. Servo motor is a constant torque output, the torque frequency characteristics of the two are different.

3. The performance of stepper motor and servo motor is different

The quality assured stepper motor is open loop control and we need to deal with speed issues when in use. Servo motor adopts closed-loop control for easy control. To sum up, stepper motor and servo motor have great differences in control accuracy and overload capacity, as well as low frequency characteristics, torque frequency characteristics and operating performance. So obviously, both have their advantages. If users want to make a choice, they need to combine the best of both worlds with their actual needs to make the decision.