Servo Adjustment
6.4.4 Gain Setting Reference Values
6 -32
J
J
Machines with High Rigidity
These machines are directly connected to ball screws.
Example: Chip mounting machine, bonding machine, high-precision machine tool
Position Loop Gain
(Pn102) [1/s]
Speed Loop Gain (Pn100)
[Hz]
Speed Loop Integral Time
Constant (Pn101) [ms]
50 to 70
50 to 70
5 to 20
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Machines with Medium Rigidity
These machines are driven by ball screws through speed reducers or long-length machines di-
rectly driven by screws.
Example: General machining tool, transverse robot, and conveyor
Position Loop Gain
(Pn102) [1/s]
Speed Loop Gain (Pn100)
[Hz]
Speed Loop Integral Time
Constant (Pn101) [ms]
30 to 50
30 to 50
10 to 40
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Machines with Low Rigidity
These machines are driven by timing belts or chains or machines with wave reduction gears.
Example: Conveyor and articulated robot
Position Loop Gain
(Pn102) [1/s]
Speed Loop Gain (Pn100)
[Hz]
Speed Loop Integral Time
Constant (Pn101) [ms]
10 to 20
10 to 20
50 to 120
If the inertia ratio is a little larger than 10, start gain adjustments with the position and speed loop gains slightly
below the above corresponding ranges and the speed loop integral constant slightly exceeding the above corre-
sponding range. If the inertia ratio is much larger, start the gain adjustments with the position and speed loop
gains set to the smallest values and the speed loop integral constant to the largest value in the above correspond-
ing ranges.
In speed control operation, the position loop gain is set through the host device. If that is not pos-
sible, adjust the position loop gain with the speed referenceinput gainin Pn300in theServopack.
In speed control operation, the position loop gain set in Pn102 is enabled in zero-clamp mode
only. Position loop gain Kp is obtainable from the following.
Kp
Vs
Á
·
Kp
(
1/S
)
: Position Loop Gain
·
Vs
(
PPS
)
: Constant Speed Reference
· e
(
Pulse
)
: Constant error: The number of accumulated pulsesof the error counter at the
above constant speed.
6
IMPORTANT
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