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6.8 Gain adjustment 
6.8.1 Load shaking 
The following causes cause load wobble: 
1. The instruction is not smooth enough when the load inertia is too large. 
Countermeasure:   
(1) Use position instruction smoothing filter P1-25; 
(2) Optimizing the instructions of the upper device to reduce the acceleration of the instructions; 
(3) Replace the motor with greater inertia. 
 
2. Servo gain is too small, resulting in insufficient rigidity 
Countermeasure:   
(1) Increase the gain parameters and rigidity to enhance the anti-disturbance ability. 
 
3. Insufficient rigidity of mechanism and equipment sloshing 
Countermeasure:   
(1) Reducing gain parameters; 
(2) Optimize the instructions of the upper device and reduce the acceleration of the instructions. 
 
6.8.2 Vibration 
The following causes cause machine vibration: 
(1) Vibration due to inappropriate servo gain 
Countermeasure: Reduce gain 
(2) Mechanical resonance point 
Countermeasure: Setting notch parameters manually or through mechanical characteristic analysis 
 
6.8.3 Noise 
In adaptive mode: 
(1) Inappropriate servo gain 
Countermeasure: Reduce the adaptive control bandwidth (P2-19). 
 
In auto-tuning mode: 
(1) Inappropriate servo gain 
Countermeasure: Under the mode of rapid adjustment, reduce the rigidity level. 
 
Automatic Adjustment Mode: Reducing Model Loop Gain P2-49 
(1) Noise due to mechanical resonance 
Countermeasure: Refer to 6.8.2 vibration.