The motor is a key part of the operation of the CNC router machine. When purchasing a CNC router machine, there is stepper motor and servo motor to choose from. So what is the difference between the stepper motor and the servo motor used in CNC router machine? This post will introduce the difference between the two.

 

The difference between stepper motor and servo motor is:

 

The control precision is different. The more phases and beats a stepper motor has, the more accurate it is. The servo motor depends on the built-in encoder. The more scales of the encoder, the higher the accuracy.

 

The low frequency characteristics are different. The stepper motor is prone to low frequency vibration at low speed. When it works at low speed, damping technology or subdivision technology is generally used to overcome the low frequency vibration phenomenon. The servo motor runs very smoothly and does not vibrate even at low speeds.

 

The torque frequency characteristics are different. The output torque of the stepper motor will decrease with the increase of the speed, and the AC servo motor is a constant torque output.

 

The overload capacity is different. Stepper motors generally do not have overload capacity, while AC motors have strong overload capacity.

 

Speed ​​response performance is different. It takes hundreds of milliseconds for a stepper motor to accelerate from a standstill to a working speed. The acceleration performance of the AC servo system is better, generally only a few milliseconds, and it can be used for control occasions requiring rapid start and stop.

 

Through the above analysis, you can understand the difference between stepper motor and servo motor. The advantages of servo motors are more obvious, and of course the price is more expensive. But if you just need to cut wood or acrylic, a stepper motor can meet your needs and it's cheaper. Therefore, it is necessary to purchase CNC router machine according to the processing needs to give full play to its maximum value.