Patent ID: 11874678
Assignee: OKUMA CORPORATION
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 3:
4. A system comprising:
a moving part that is driven by a servo motor;
a numerical control device that generates a movement command for the moving part;
a filter that shapes the movement command generated by the numerical control device and limits frequencies to be passed;
a detector that detects a position or a speed of the moving part; and
a servo amplifier that controls a force generated by the servo motor or a force transmitted to the moving part such that a deviation between an output from the filter and a detection value detected by the detector becomes 0,, wherein a vibration control method of the system for controlling vibration of the moving part comprises: reducing an amplification factor used for amplifying the deviation in the servo amplifier, measuring a frequency and an amplitude of vibration superimposed on the moving part, reducing, when the amplitude of the vibration exceeds a predetermined amplitude, a gain of the filter at the frequency of the vibration by at least the ratio of the amplitude of the vibration to the predetermined amplitude, and returning the amplification factor used for amplifying the deviation to an original amplification factor.