Mitsubishi Electric MELSERVO MR-J3 A Series, Instruction Manual

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5. PARAMETERS
Control Mode
No. Symbol Name and Function
Initial
Value
Unit
Setting
Range Position Speed Torque
PB03 PST Position command acceleration/deceleration time constant
(position smoothing)
Used to set the time constant of a low-pass filter in response to the
position command.
You can use parameter No. PB25 to choose the primary delay or
linear acceleration/deceleration control system. When you choose
linear acceleration/deceleration, the setting range is 0 to 10ms.
Setting of longer than 10ms is recognized as 10ms. 0 ms 0
to
20000
POINT
When you have chosen linear acceleration/deceleration, do
not select control selection (parameter No. PA01) and restart
after instantaneous power failure (parameter No. PC22).
Doing so will cause the servo motor to make a sudden stop
at the time of position control switching or restart.
Example: When a command is given from a synchronizing
detector, synchronous operation can be started
smoothly if started during line operation.
Synchronizing
detector
Start
Servo amplifier
Servo motor
Without time
constant setting
Servo motor
speed
Start
With time
constant setting
ON
OFF
t
PB04 FFC Feed forward gain
Set the feed forward gain. When the setting is 100%, the droop
pulses during operation at constant speed are nearly zero.
However, sudden acceleration/deceleration will increase the
overshoot. As a guideline, when the feed forward gain setting is
100%, set 1s or more as the acceleration/deceleration time
constant up to the rated speed.
0 % 0
to
100
PB05 For manufacturer setting
Do not change this value by any means. 500
PB06 GD2 Ratio of load inertia moment to servo motor inertia moment
Used to set the ratio of the load inertia moment to the servo motor
shaft inertia moment. When auto tuning mode 1 and interpolation
mode is selected, the result of auto tuning is automatically used.
(Refer to section 7.1.1)
In this case, it varies between 0 and 100.0.
7.0 times 0
to
300.0