Setting Of Pressure Control System - Mitsubishi Electric MELSERVO MR-J4-B-LL Series Instruction Manual

4. PRESSURE LOOP GAIN ADJUSTMENT

4.3 Setting of pressure control system

Set the parameters as follows according to the machine configuration and the controller to be used.
(1) Setting of the rotation direction and the pressure increasing direction for the positioning address
Set [Pr. PA14 Rotation direction selection] and "selection of pressure increasing direction for positioning
address ( _ _ x _ )" of [Pr. PT12] according to the machine configuration. The following shows the servo
motor rotation direction and the pressure increasing direction for the positioning address.
The following is an example of a machine in which a chip is pressure-bonded with a pressure control
axis rotating in the forward rotation (CCW) direction as the positioning address is increased.
Pressure control axis
Chip
When the setting of [Pr. PA14] or [Pr. PT12] is incorrect, the machine may not operate properly such that
the servo motor continues rotating even when the pressure feedback exceeds the pressure command,
or the servo motor stops before the pressure feedback reaches the value of the pressure command. In
such case, stop the operation immediately, and check the servo motor rotation direction and the
pressure increasing direction. Reset [Pr. PA14] and [Pr. PT12] correctly.
(2) Setting of the forward/reverse-side stop function
When the forward/reverse-side stop function is selected with "_ x _ _" of [Pr. PT12], a controller
compatible with each function is required.
When using the Motion controller of R64MTCPU/R32MTCPU/R16MTCPU, set the forward/reverse-side
stop function to "_ 1 _ _" in [Pr. PT12]. For the mode in which the pressure control axis keeps reversing
with an error of the pressure sensor (load cell) during the pressure control, set software stroke limit with
the servo system controller. For details, refer to the manuals for servo system controllers.
Parameter setting
Positioning address increase
value
PT12
PA14 Pressure
"_ _ x _"
0
0 Decrease
1
0
1 Increase
1
When the servo motor rotates in the forward rotation (CCW) direction as
the positioning address increases:
Set [Pr. PA14 Rotation direction selection] to "0".
When the pressure increases as the positioning address increases:
Set "selection of pressure increasing direction for positioning address" of
[Pr. PT12] to "pressure increases as the positioning address increases
( _ _ 1 _ )".
4 - 2
Positioning address decrease
Servo motor
rotation Pressure
direction
CCW
Increase
CW
CCW
Decrease
CW
Servo motor
rotation
direction
CW
CCW
CW
CCW