There are significant differences between servo motors and stepper motors in several aspects，These differences are mainly reflected in the control accuracy、Low frequency characteristic、Moment frequency characteristic、Overload capacity、Control device、Speed response and efficiency。Here is a breakdown of these differences：

1. Control accuracy

• Servo motor：It has very high control accuracy，Position feedback is usually provided by encoder，Realize closed-loop control。This control mode allows the servo motor to precisely control the position and speed，Meet the needs of high-precision applications。

• Stepper motor：The control accuracy is relatively low，It is mainly determined by the step Angle。Although the position and speed can be adjusted by controlling the number and frequency of pulses，But the accuracy can not be compared with the servo motor。

2. Low frequency characteristic

• Servo motor：In low frequency operation，Stable performance，There will be no vibration and noise。

• Stepper motor：In low frequency operation，Due to the influence of step Angle，Slow speed is prone to vibration and noise，The running stability is affected。

3. Moment frequency characteristic

• Servo motor：At high speed，Able to maintain a stable output torque，It is not easy to lose step。

• Stepper motor：At high speed，Due to the influence of step Angle，It is easy to lose steps，Resulting in deviations in position and velocity。

4. Overload capacity

• Servo motor：Has a strong overload capacity，Capable of carrying rated torque1-3times，Suitable for applications requiring high torque output。

• Stepper motor：The overload capability is weak，Once it exceeds the rated load，It is easy to lose steps or stop running。

5. Control device

• Servo motor：A closed loop control device is usually used，Position feedback combined with encoder，Achieve precise control。

• Stepper motor：Open loop control is usually used，No position feedback，The control accuracy is relatively low。

6. Velocity response

• Servo motor：With fast speed response capability，Usually the response time is in10Within milliseconds，Suitable for applications requiring fast response。

• Stepper motor：The speed response is relatively slow，Response time is usually in200-400In milliseconds，Not suitable for applications that require a fast response。

7. efficiency

• Servo motor：It usually has high efficiency，It can effectively convert electrical energy into mechanical energy，Reduce energy consumption。

• Stepper motor：The efficiency is relatively low，Usually in60%around，The energy efficiency is not as high as the servo motor。

To sum up，Servo motor in control accuracy、Low frequency characteristic、Moment frequency characteristic、Overload capacity、Control device、Speed response and efficiency are better than stepper motor。therefore，High precision in need、High stability、Highly responsive and efficient applications，Servo motor is a more suitable choice。however，Stepper motor because of its simple structure、Advantages of lower cost，It is still widely used in some occasions where the accuracy and performance requirements are not high。