Sigma II User’s Manual Chapter 6: Servo Adjustment
6 - 6
6.1.6 Notch Filter
Vibration in the machine can sometimes be eliminated by using a notch filter for the
frequency at which the vibration is occurring.
This parameter can be set to enable the notch filter.
Use the following parameter to set the frequency at which the filter is effective.
SGDH amplifiers with version number starting with 33 or higher, have 2 notch fil-
ters (NF) incorporated in the torque control loop. These notch filters have both center fre-
quency and Q value adjustments.
The notch filter may eliminate specific frequency vibration generated by resonance of a
machine. The notch filter puts a notch in the gain curve at the specific vibration fre-
quency. A higher notch filter Q value produces a sharper notch and phase delay.
Parameter Signal Setting Description
Pn408.0 Notch Filter Selection Default Setting: 0
Speed/Torque Control,
Position Control
Pn408.0 Setting Result
0 None.
1 Enables notch filter for torque reference.
Parameter Signal
Setting
(Hz)
Description
Pn409 Notch Filter Frequency
Setting Range: 50 to 2000
Default Setting: 2000
Speed/Torque Control,
Position Control
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