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Why servo motor is used in NC cylindrical grinding machine?

Jul 28, 2017

Advantages of the servo motor applied in Numerical control internal grinder:

Firstly, low frequency characteristics. Compared with stepper motor, servo motor will not produce vibration, AC servo motor running smoothly.

Secondly, high control accuracy. The control accuracy of AC servo motor is guaranteed by the rotary encoder at the back of the motor shaft.

Robotic arm compound grinders.jpg

MKF2115Robotic arm compound grinders

Third, overload ability. Stepping motor has no overload ability. In order to overcome the inertia load, the motor with higher rated torque than load torque should be selected in the selection of numerical control internal cylindrical grinding machine. The AC servo motor has a strong overload capacity, the maximum torque of the general servo motor can reach about three times the rated torque.

Forth, quick response. The stepper motor is 200-400 milliseconds from the static to the rated speed, while the AC servo motor only takes a few milliseconds.

Fifth, good torque frequency characteristics. Stepper motor in the case of higher speed will decline sharply, so the maximum speed of stepper motor at about 300-600 rpm. AC servo motor output constant torque, speed at 2000-3000 rpm.

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