Omron 8U0108-E1-01, User Manual

Page: 176 / 333

XtraDrive User 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 0.01ms)
Application
Pn401
Torque Reference
Filter Time Constant
Setting Range: 0 to 65535
Default Setting: 100
Speed/Torque Control,
Position Control
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 Control,
Position Control
This parameter can be set to enable the notch filter.
Pn408.0 Setting Result
0 None.
1
Enables notch filter for torque reference.
2 Use net notch (not implemented)
3 Use both.
Use the following parameter to set the frequency at which the filter is
effective.
Parameter Signal Setting(Hz) Application
Pn409 Notch Filter Frequency
Setting Range: 50 to 2000
Default Setting: 2000
Speed/Torque Control,
Position Control
Pn40A Notch Filter Width
Setting Range: 70 to 1000
Default Setting: 70
Speed/Torque Control,
Position Control