Yaskawa FSP Amplifier - Manual (Page 176)

FSP Amplifier User’s Manual Chapter 6: Servo Adjustment
6-9
6.2.8. Setting the Torque Reference Filter Time Constant
If there is machine vibration, which may be caused by the servo drive, try
adjusting the filter time constant in Pn401. This may stop the vibration.
Parameter Signal Setting (x 0.01 ms) Application
Pn401
Torque Reference
Filter Time Constant Range: 0 to 65535
Default Setting: 100
Speed, Torque, Position
Control, and
Programming
The constant above is the filter time constant of the torque reference to be
set in the servo amplifier. The smaller the value, the faster the speed
control response will be. There is, however, a limit, depending on machine
conditions.
In order to find the optimal value of the torque filter, repeat steps 1 and 2 of
previous section for each new try of the torque filter. Finally select the
optimal torque filter value as the one who results in the highest Kv.
6.2.9. Notch Filter
Vibration in the machine can sometimes be eliminated by using a notch
filter for the frequency at which the vibration is occurring.
Parameter Signal Setting Application
Pn408.0 Notch Filter Selection Default Setting: 0
Speed, Torque, Position
Control, and
Programming
This parameter can be set to enable the notch filter.
Pn408.0 Setting Result
0 None.
1
Enables notch filter for torque reference.
Use the following parameter to set the frequency at which the filter is
effective.
Parameter Signal Setting (Hz) Application
Pn409 Notch Filter Frequency
Range: 50 to 2000
Default Setting: 2000 Speed/Torque Control,
Position Control
Pn40A Notch Filter Width
Range: 70 to 1000
Default Setting: 70 Speed/Torque Control,
Position Control