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4. OPERATION AND FUNCTIONS
4.1.7 Setting of dual feedback switching filter
(1) Parameter
No.
Abbreviation
Name and Function
Initial
Value
Unit
Setting
Range
67
DUF
Dual F/B filter
Set the bandwidth of the dual F/B filter.
At 1000rad/s setting, the full closed control is made
always valid.
At 0rad/s setting, the full closed control is made invalid.
About half of the position loop gain 2 in parameter No.
15 is the guideline of the upper setting limit.
10
rad/s
0
to
1000
Note 1. When changing the setting of the above parameter, set "000F" in parameter No. 40 "parameter block ( BLK)".
(2) Parameter setting method
1) With the initial value (setting = 10) set in parameter No. 67, make gain adjustment by auto
tuning, etc. as in semi closed control.
2) While observing the servo operation waveform with the graph function, etc. of
the MR
Configurator, adjust the dual F/B filter.
The dual F/B filter operates as described below depending on the setting.
No. 67 Setting
Smaller
1 (initial value = 10)
to
Larger
PG2 setting/2
1000
Control mode
Dual F/B
Full closed
Vibration
Less likely to occur.
More likely to occur.
Settling time
Increases.
Decreases.
Increasing the dual F/B filter setting shortens the settling time, but increases motor
vibration since the motor is more likely to be influenced by the full closed encoder vibration.
The maximum setting of the dual F/B filter should be less than half of the PG2 setting.
[Reduction of settling time]: Increase the dual F/B filter setting.
[Suppression of vibration]: Decrease the dual F/B filter setting.
Droop pulses
Time
Command
Droop pulses
Time
Command
Droop pulses
Droop pulses
Time
Command
Time
Command
Summary of Contents for Melservo-J2-SUPER series
Page 19: ...1 6 1 FUNCTIONS AND CONFIGURATION MEMO...
Page 49: ...2 30 2 LINEAR SCALES MEMO...
Page 85: ...5 8 5 PARAMETERS MEMO...
