6 Applied Functions
6 - 8
OMNUC G5-series (Pulse-train Input Type) AC Servomotors and Servo Drives User’s Manual
6-3 Notch Filters
Four notch filters can be set for the torque command.
If a ball screw or other controlled device causes resonance at a specific location, you can set the
resonance frequency using a notch filter to eliminate resonance.
A notch filter is used to eliminate a specified frequency component.
If mechanical resonance occurs, use this notch filter to eliminate resonance.
6-3-1 Outline of the Function
Depth=Fc/fw
Cut-off frequency Fc
Frequency Hz
Width fw
fw
0 db
-3 db
Notch filter 1 Notch filter 2
Machine resonance
Notch filter
Characteristics
after filtering
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