What is the difference between stepper motors and servo motors and how are they different? What are the main aspects?

Stepper motor and servo motor is often talked about two kinds of motors, many friends like to use the two as a comparison, to choose the right motor products, then what is the difference between the stepper motor and servo motor and different? What are the main aspects of the performance? Let’s take a look!

1. Control accuracy: the precision of the stepper motor depends on its number of phases and the number of beats, while the servo motor depends on its own encoder, the step angle of the stepper motor is generally larger, the servo motor control accuracy is higher.

2. Control mode: Stepper motor adopts open-loop control, while servo motor adopts closed-loop control.

3. Torque frequency characteristics: the output torque of the stepper motor decreases with the increase of speed, the maximum working speed is generally 0 ~ 900RPM. servo motor is a constant torque output, at its rated speed (generally 1000 ~ 3000RPM), can output the rated torque.

4. Overload capacity: Stepping motors generally do not have overload capacity, while the servo motor has 2 ~ 3 times the speed overload and torque overload capacity.

5. Dynamic Response: Servo motors have better dynamic response and stability, and can respond quickly to external control signals and achieve accurate position and speed control. Stepper motors are prone to vibration and shock during high-speed movement and acceleration/deceleration.

6. Operational performance: Servo motors are suitable for applications requiring high accuracy, speed and response, such as robotics, CNC machining etc. Stepper motors are suitable for low-cost, low-accuracy control applications such as printers and vending machines.

7. Speed response performance: Stepper motors accelerate from standstill to operating speed in hundreds of milliseconds, while servo systems have better acceleration performance, generally only a few milliseconds, and can be used in control applications that require rapid start and stop.

What are the differences between stepper motors and servo motors? What are the main aspects? There are significant differences between stepper motors and servo motors in terms of control accuracy, control mode, torque-frequency characteristics, overload capacity, dynamic response, running performance and speed response performance. In practical applications, the appropriate motor type should be selected according to specific needs.

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