User manual of ELP AC Servo
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45
Pr1.08
Name
2nd Filter of Velocity Detection
Mode
P
S
T
Range
0~31
Unit
—
Default
15
Data Type
16bit
Access
R/W
Address
0111H
Repower
-
Pr1.09
Name
2nd Time Constant of torque
filter
Mode
P
S
T
Range
0~2500
Unit
0.01ms
Default
126
Data Type
16bit
Access
R/W
Address
0113H
Repower
-
Position loop, velocity loop, velocity detection filter, torque command filter have their
2 pairs of gain or time constant(1st
and 2nd).
Pr1.10
Name
Velocity feed forward gain
Mode
P
Range
0~1000
Unit
0.10%
Default
300
Data Type
16bit
Access
R/W
Address
0115H
Repower
-
Multiply the velocity control command calculated according to the internal positional
command by the ratio of this parameter and add the result to the speed command
resulting from the positional control process.
Pr1.11
Name
Velocity feed forward filter
Mode
P
Range
0~6400
Unit
0.01ms
Default
50
Data Type
16bit
Access
R/W
Address
0117H
Repower
-
Set the time constant of 1st delay filter which affects the input of speed feed forward.
(usage example of velocity feed forward)
The velocity feed forward will become effective as the
velocity feed forward gain is
gradually increased with the speed feed forward filter set at approx.50 (0.5ms). The
positional deviation during operation at a constant speed is reduced as shown in the
equation below in proportion to the value of velocity feed forward gain.
Position deviation [ unit of command]=command speed [ unit of command /s]/position
loop gain[1/s]×(100-speed feed forward gain[%]/100
Pr1.12
Name
Torque feed forward gain
Mode
P
S
Range
0~1000
Unit
0.1%
Default
0
Data Type
16bit
Access
R/W
Address
0119H
Repower
-
Multiply the torque control command calculated according to the velocity control
command by the ratio of this parameter and add the result to the torque command
resulting from the velocity control process.