The vibration failure of high speed rotary table machine usually occurs in the mechanical part and feed servo system. There are many reasons for oscillation, in addition to mechanical transmission clearance, elastic deformation, friction resistance and many other factors, servo system parameters are also very important. Servo system has AC and DC two kinds. Most CNC machine tools are fully closed loop. There are four reasons for servo system vibration:

1. Poor position ring leads to unstable output voltage;

2, vibration caused by poor speed ring;

3, the servo system adjustable positioner is too large resulting in voltage output distortion;

4, transmission machinery installation, such as lead screw clearance is too large. The distortion of the output parameters of these control rings or the excessive clearance of the mechanical transmission device are the main factors causing vibration. They can be optimized with a servo control system.

High-speed rotary table machine to eliminate the basic measures of oscillation:

1. Oscillation caused by closed-loop servo system

The semi-closed loop device is used in some NUMERICAL control servo systems of small rotary table machine, while the parameters of the full-closed loop servo system must be adjusted under the premise that the local semi-closed loop system does not oscillate, so the two are similar.

2. Reduce the gain of the position loop

There is a reference standard value in the servo system, and the oscillation of the high-speed rotary table machine can appropriately reduce the gain, but not too much, because the steady-state error of the system must be ensured.

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