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11 Adjustment Functions
AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User’s Manual (I586)
11-10 Notch Filters
11
11-10-2 Notch Filter Width and Depth
Precautions for Correct Use
• Identify the resonance frequency from the FFT function or other functions of the Sysmac
Studio, and set the identified frequency in Frequency of the notch filter.
• If the adaptive notch filter is set, the objects for the specified notch filter are automatically set.
If you want to set the objects for the notch filter manually, disable Adaptive Notch Filter.
This section explains how to set width and depth of the notch filter.
Use Q-value to set the notch filter width. The relationship between Q-value, Cutoff Frequency (Fc), and
Width (fw) is expressed as Q = Fc/fw. The lower the Q-value is, the wider the notch filter becomes.
Set the notch filter depth in damping ratio [dB]. The larger the value of damping ratio is, the deeper the
notch filter becomes.
11-10-2 Notch Filter Width and Depth
Width Setting
Depth Setting
Frequency [Hz]
Gain [dB]
Q = 0.5
0
-10
-20
-30
-40
-50
-60
Q = 0.75
Q = 1.0
Frequency [Hz]
Depth 60 dB
Depth 40 dB
Depth 20 dB
Gain [dB]
0
-10
-20
-30
-40
-50
-60
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