118 
speed loop integral P1-01: 3300 
speed loop integral P1-01: 825 
speed loop integral P1-01: 825 
position loop gain P1-02: 200 
position loop gain P1-02: 700 
position loop gain P1-02: 700 
Model loop gain P2-49: 300 
Model loop gain P2-49: 300 
Model loop gain P2-49: 4000 
Phenomenon:  Running  jitter, 
slow response 
Phenomenon:  smooth  operation 
and slow response 
Phenomenon: smooth  operation 
and fast response 
Note: The above curves only show the effect of the parameters, not the real running curves. 
6.1.4 Torque disturbance observation 
Disturbance observer can reduce the influence of external disturbance on servo system and improve the 
anti-disturbance ability by detecting and estimating the external disturbance torque of the system and 
compensating the torque command. 
If  the  soft  mode  is  selected  in  the  auto-tuning  mode,  the  disturbance  observer  will  be  closed 
automatically, and the gain of the disturbance observer will not change. If the fast positioning or fast 
positioning (control overshoot) is selected, the disturbance observer will be opened automatically, and 
the gain of the disturbance observer will be modified to 85. The relevant parameters of this function no 
need to be set manually by users. 
Turn-off of disturbance observer 
Turn-on of disturbance observer 
 
Disturbance 
observer gain