No. SX-DSV02829 -
117-
5-2-12 2-stage torque filter
In addition to usual 1st and 2nd torque filters (Pr1.04 and Pr1.09), another torque filter can be set. High-frequency
vibration component can be suppressed by the use of the 2-stage torque filter.
2nd torque filter
(
Pr1.09
)
When 2nd gain is
selected
torque command
1st torque filter
(
Pr1.04
)
When 1st gain is
selected
2nd torque filter
(Pr6.42 and Pr6.43)
Switching gain
(1) Application range
This function can’t be applied unless the following conditions are satisfied.
Conditions for operating 2-stage torque filter
Control mode
• Can be used in all control modes.
Others
• In servo-ON state
• Elements, such as deviation counter clear command input inhibition and torque limit, other
than control parameter are set properly, and motor is running without any problem.
(2) Precautions
• If the setting value is increased excessively, the control may become unstable to produce vibration.
Specify proper setting value while checking the status of the device.
• If Pr6.43 “2-stage torque filter attenuation term” is changed during operation, vibration may be generated.
Change the value while the motor is stopped.
(3) Parameters
Class No.
At-
trib-
ute *1)
Title
Range
Unit
Function
6
42
B
2-stage torque
filter time
constant
0–2500
0.01ms
Sets 2-stage torque filter time constant.
The time constant is invalid if 0 is specified.
[When used for the secondary filter as Pr6.43
≥
50]
The time constants that can be used are 5
−
159 (0.05
−
1.59 ms).
(Equivalent to 100
−
3000 Hz in frequency)
Setting values 1
−
4 works as 5 (3000 Hz), and 159
−
2500 works as
159 (100 Hz).
6
43
B
2-stage torque
filter attenuation
term
0–1000
—
Sets attenuation term of 2-stage torque filter.
The filter degree of the 2-stage torque filter is changed according to
the setting value.
0
−
49:
Operates as the 1st filter.
50
−
1000:
Operates as a 2nd filter and becomes a 2nd filter with ζ = 1.0 if
setting value is 1000. As the setting value is decreased, the filter
becomes vibrational. Use with a setting value 1000 basically.
*1) For parameter attribute, refer to Section 9-1.
(4) Usage
Set a 2-stage torque filter if high-frequency vibration can’t be removed only using usual 1st and 2nd torque
filters. Setting Pr6.43 “2-stage torque filter attenuation term”
to 1000 (ζ=1.0), adjust Pr6.42 “2-stage torque filter
time constant”.
R1.00
Motor Business Unit, Panasonic Corporation