What are the main differences between servo motors and stepper motors

Servo motors and stepper motors are widely used in various industries in daily life. What is the difference between them? This has always been a topic of discussion among many friends. To put it simply, both have their own advantages. What is the difference between them? Below, Shi Mengguang will give you a brief analysis!
 

1. Different low-frequency characteristics

Due to the fact that stepper motors are prone to low-frequency vibrations at low speeds, the vibration frequency, load, and performance of the driver are closely related. The working principle of stepper motors determines that low-frequency vibrations can have adverse effects on the normal operation of mechanical equipment. However, damping technology is commonly used to overcome low-frequency vibrations during low-speed operation, including installing dampers on stepper motors or using subdivision techniques on drivers.

2. Different overload capacities

Most stepper motors do not have overload capacity, while servo motors have stronger overload capacity, which can largely overcome inertial loads and generate inertia moments during startup. However, stepper motors do not have this overload capacity, so in order to overcome these shortcomings, it is usually necessary to choose high torque motors, which do not require such a large torque in actual use, inevitably causing some waste.

3. Different operating systems

The stepper motor control is in an open-loop control state, and the restart frequency is too high. In the case of excessive load, accidents or stalling are prone to occur. In order to effectively ensure that its accuracy does not change significantly, it is necessary to deal with acceleration and deceleration issues. The servo drive system has closed-loop control, especially its driver can directly implement signal feedback sampling of the motor encoder, which greatly avoids errors or faults and makes its control performance more reliable.