Question

What is servo motor and stepper motor authenticity? What is the difference in servo motor and stepper motor performance?

Answer 1

 What is the difference in servo motor and stepper motor performance?

Comprehensive comparative analysis of the performance of stepper motors and servo motors

The servo itself has no holding torque, while the stepper motor has a holding torque. The difference is that the so-called stationary of the servo motor is actually a dynamic balancing process, and the motor will not really stop at the specified position.

What is the difference in servo motor and stepper motor performance?

1. The control accuracy is different: the pulse equivalent of the AC servo motor is one hundredth of the pulse equivalent of the stepper motor.

2. Different low-frequency characteristics: stepper motors are prone to low-frequency vibration at low speeds. The AC servo motor runs very smoothly and does not vibrate even at low speeds.

3. Different torque-frequency characteristics: the output torque of the stepper motor decreases with the increase of speed, and it will drop sharply at higher speeds, so its maximum working speed is generally 300 to 600rpm.

Answer 2

The acceleration performance of the AC servo system is better, and it only takes a few milliseconds to accelerate from standstill to its rated speed. 

The control accuracy of AC servo motor is different, and the pulse equivalent of AC servo motor is one hundredth of the pulse equivalent of the stepper motor. 

Performance comparison of servo motor and stepper motor:

Stepper motors usually do not have an overload capability.

The communication servo motor has a strong overload ability.

It has speed overload and torque overload talent. Its maximum torque is two to three times the additional torque.

Comments

Performance comparison Control accuracy: the more phases and beats of the stepper motor, the higher its accuracy, the servo motor is taken from the built-in encoder, the more scales of the encoder, the higher the accuracy; Low-frequency characteristics: Stepper motors are prone to low-frequency vibration at low speeds.

Stepper motor in the cost performance is advantageous, to achieve the same function in the case of servo motor price is greater than the same power stepper motor, servo motor high response, high speed and high precision advantages determine the price of the product is high, which is inevitable.