Pb04 Ffc Feed Forward Gain; Pb05 For Manufacturer Setting; Pb06 Gd2 Ratio Of Load Inertia Moment To Servo Motor Inertia Moment - Mitsubishi Electric Melservo MR-J3-A Instruction Manual

5. PARAMETERS
No. Symbol
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.
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.
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.
PB05 For manufacturer setting
Do not change this value by any means.
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.
Name and Function
Synchronizing
detector
Start
Servo amplifier
Without time
constant setting
Servo motor
speed
ON
OFF
Start
Servo motor
With time
constant setting
t
5 - 19
Initial Setting
Unit
Value Range Position Speed Torque
0 ms 0
to
20000
0 % 0
to
100
500
7.0 times 0
to
300.0
Control Mode