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4. PRESSURE LOOP GAIN ADJUSTMENT
4. PRESSURE LOOP GAIN ADJUSTMENT
4.1 Summary
Adjust pressure control in order to increase the response performance to the pressure command from the
controller. Check the pressure command and the pressure feedback, and then execute the gain adjustment
of the pressure control in accordance with the machine configuration and the required performance.
4.2 Pressure control adjustment flowchart
The following shows the flowchart of the pressure control adjustment. In this section, "Setting pressure
control system" and the subsequent procedures are explained.
Start
Startup of the system
Adjustment of position loop gain
Setting of pressure control system
Setting of pressure feedback
Adjustment of pressure loop gain
Checking of adjustment result
End
POINT
Before making gain adjustment, check that neither speed nor torque is limited.
Start a system after installation and wiring.
Before executing the pressure control adjustment, adjust GD2 ([Pr. PB06]), PG1 ([Pr. PB07]),
PG2 ([Pr. PB08]), VG2 ([Pr. PB09]), and VIC ([Pr. PB10]) in the position control mode, referring
to chapter 6 and 7 of "MR-J4-_B_(-RJ) Servo Amplifier Instruction Manual".
Set the rotation direction, the pressure increasing direction for positioning address, and the
forward/reverse-side stop function according to the machine configuration. (Refer to section
4.3.)
Set the pressure feedback unit constant, the offset, the filter time constant, etc. with the
parameters of the load cell amplifier and the servo amplifier. (Refer to section 4.4.)
Adjust the gain for the pressure control mode.
Check the pressure command and the pressure feedback, and adjust the pressure loop gain,
the pressure integral compensation, and the pressure incomplete integral coefficient. (Refer to
section 4.5.)
Check the operation status by executing the pressure control cycle operation in the actual
operation pattern. (Refer to section 4.6.)
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