Yaskawa Sigma II Series SGMVH - Manual (Page 279)

9.4 Servo Gain Adjustment Functions
9
Adjustments
9-19
1. Sufficient precautions must be taken when setting the notch frequency. Do not set the notch filter fre-
quency (Pn409, Pn40B) that is close to the speed loop’s response frequency. Set the frequency at least
four times higher than the speed loop’s response frequency. Setting the notch filter frequency too close to
the response frequency may cause vibration and damage the machine. The speed loop response fre-
quency is the value of the Speed Loop Gain (Pn100) when the Moment of Inertia Ratio (Pn103) is set to
the correct value.
2. Change the Notch Filter Frequency (Pn409, Pn40B) only when the servomotor is stopped. Vibration may
occur if the notch filter frequency is changed when the servomotor is rotating.
IMPORTANT