142 
Reducing P2-08 and increasing P2-12 can 
greatly improve the inertia capability, but 
it will reduce the responsiveness, which 
has a great impact on responsiveness. 
Adaptive  stable 
max inertia ratio   
Adaptive  speed 
loop  integral  time 
coefficient   
Adjust according to need, generally 
increase 
Adaptive  position 
loop  gain 
coefficient 
Adjust according to the need, increasing 
will make the response fast, reducing will 
make the response slow 
Adaptive  motor 
rotor  inertia 
coefficient 
Increasing will improve the servo rigidity 
and enhance anti-disturbance ability, can 
solve operation jitter. 
Increasing will improve the inertia 
capacity slightly, and has little effect on 
the responsiveness, to be an auxiliary 
parameter. 
6.6.7 Invalid parameters when adaptive effective 
When the adaptive function is effective (P2-01.0=1), the invalid parameters are shown as below:   
First speed loop integral time constant   
Second speed loop integral time constant   
Second position loop gain   
/I-SEL inertia ratio switch 
 
 
6.7 Vibration suppression 
6.7.1 Overview 
The  mechanical  system  has  a  certain  resonance  frequency.  When  the  servo  gain  is  increased,  the 
continuous vibration may occur near the resonance frequency of the mechanical system. Generally in 
the  range  of  400Hz  to  1000Hz,  it  caused  the  gain  can  not  continue  to  increase.  Vibration  can  be 
eliminated by automatically detecting or manually setting the vibration frequency. After the vibration is 
eliminated, if the responsiveness needs to be improved, the gain can be further improved. 
Note: 
(1) Servo responsiveness will change after vibration suppression operation. 
(2) Before performing the vibration suppression operation, please set the inertia ratio and gain 
parameters correctly, otherwise it can not be controlled properly.