Mitsubishi Electric MELSERVO-J4 series, Instruction Manual

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16 FULLY CLOSED LOOP SYSTEM
16.3 Operation and functions
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16
Setting of fully closed loop dual feedback filter
With the initial value (setting = 10) set in [Pr. PE08 Fully closed loop dual feedback filter the dual feedback filter], make gain
adjustment by auto tuning, etc. as in semi closed loop control. While observing the servo operation waveform with the graph
function, etc. of MR Configurator2, adjust the dual feedback filter.
The dual feedback filter operates as described below depending on the setting.
Increasing the dual feedback filter setting shortens the settling time, but increases servo motor vibration since the motor is
more likely to be influenced by the load-side encoder vibration. The maximum setting of the dual feedback filter should be less
than half of the PG2 setting.
Reduction of settling time: Increase the dual feedback filter setting.
Suppression of vibration: Decrease the dual feedback filter setting.
[Pr. PE08] setting Control mode Vibration Settling time
1
to
4499 Dual feedback Not frequently occurs
to
Frequently occurs Long time
to
Short time
4500 Fully closed loop  
Droop pulses
Command
Droop pulses
Command
Time Time
Droop pulses
Command
Droop pulses
Command
Time Time