Mitsubishi Electric MELSERVO MR-J4-B-LL Series, Инструкция по эксплуатации

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4. PRESSURE LOOP GAIN ADJUSTMENT
4 - 6
(a) For a machine providing a constant pressure when the servo motor stops
First, set [Pr. PT01], [Pr. PT02], and [Pr. PT03] as follows.
Parameter Symbol Setting
PT01 APA
Set the result of (2) adjustment of the proportional control gain
(pressure loop gain)
PT02 AIA Set "500".
PT03 ADA Set "5000".
Next, increase the value of [Pr. PT03] gradually. If an overshoot or a vibration occurs, decrease the
value slightly. It is not necessary to set too large value in [Pr. PT03].
Then, decrease the value of [Pr. PT02] gradually. If an overshoot or a vibration occurs, increase the
value slightly.
The following shows the relation between the setting value of the integral control gain (pressure
integral compensation and pressure incomplete integral coefficient) and the response performance.
[Pr. PT03 Pressure incomplete integral coefficient]
Setting value of [Pr. PT03]
Large
Low
High
Small
Time
Response
Pressure
Pressure command
Pressure feedback
Increasing the setting value of [Pr. PT03] improves track ability to the command.
A too large setting value will generate overshoot or vibration.
Increasing the setting value of [Pr. PT03]
[Pr. PT02 Pressure integral compensation]
Setting value of [Pr. PT02]
Large
Low
High
Small
Time
Decreasing the setting value of [Pr. PT02] improves track ability to the command.
A too small setting value will generate overshoot or vibration.
Response
Pressure
Pressure command
Pressure feedback
Decreasing the setting value of [Pr. PT02]