Stepper servos and stepper motors are both the same device, but they work and are controlled differently.

A stepper motor is a common motor.

Its working principle is to make the motor rotor rotate according to a certain step distance by alternately energizing. The stepper motor usually adopts an open-loop control method, that is, the rotation angle and speed of the motor are controlled according to the input pulse signal.

Stepper servo is an improved product based on stepper motor.

Its working principle is to add a closed-loop control system to the stepper motor to achieve higher precision and stability.

The stepping servo can obtain the actual position and speed information of the motor through the feedback controller, compare it with the set value, calculate the error signal, and then output the control signal through the controller to adjust the rotation angle and speed of the motor to eliminate the error and Realize precise control of the load.

In contrast, stepping servo has higher precision and stability, and can achieve more precise position control and motion control.

However, the cost of the stepping servo is relatively high, and it is suitable for application scenarios that require high precision.