How to choose servo motor and stepper motor？

The driving mode of laser cutting machine is mainly driven by motor. Some customers are faced with choices when customizing fiber laser cutting machine. Is it to choose servo motor or stepper motor? Laser cutting machine manufacturers can analyze the differences between the two different driving methods for you，First of all, we should understand the difference between the servo motor and the stepper motor selected by the laser cutting machine:

Servo motor and stepper motor can be used to drive laser cutting machine, many enterprises buy laser cutting machine is to choose the former, why? The servo motor has low noise and high precision. The AC servo motor is used as the driving device, which can form a high-precision and high-performance semi-closed loop or closed loop control system like the DC servo motor.Due to the brushless structure of AC servo motor, almost no maintenance, relatively small volume, conducive to the improvement of speed and power. At present, DC servo motor has been replaced in a large range of the full digital AC servo system using high-speed microprocessor and special digital signal processor (DSP), the original hardware servo control into software servo control,Some advanced algorithms in modern control theory have been realized, and then greatly improve the performance of the servo system, so the servo unit can greatly improve the machining efficiency and precision, but the price of the servo drive unit is also high.With the gradual improvement of servo control technology, the servo drive unit is gradually becoming the main force of the drive unit, and the price of the servo drive unit is gradually reducing.

There are two kinds of servo drivers. One uses pulse control. This kind of driver closes the loop with the motor, but does not feed back to the CNC system.The other uses the voltage control mode, through the voltage of the motor speed control, the motor feedback signal through the driver feedback to the CNC system for position control.

When choosing the driving unit, it is also necessary to consider the proportion of the price of the driving unit in the whole NC machine tool,The lower price of the whole CNC machine tool generally chooses the stepper drive unit, and the higher price of the machine tool chooses the servo drive unit.However, when selecting the drive unit, the matching problem between the drive unit and the CNC system should also be considered. When selecting the closed-loop control system, the closed-loop servo drive unit must be selected. The AC servo system is superior to the stepper motor in many performance aspects.