
1-4
1-1-3Types ofGains
The following table describesgainsand adjustmentparametersthatwill improvethe responsecharac-
teristics of the ServoSystem.
Gainand adjustment
parameterFunction Parameternameforeachseries
Currentloop command
filterThe current(torque) responsespeed
will change byadjusting thisgain.
Adjust thisgainif the ServoSystem
doesnotstop causing machine
vibration afterothergainsare adjusted.
Thereisno need to adjust thisgainin
normaloperation.
U:Torque command filtertimeconstant
H:---
M:Currentcommand filtertime
constant
R:High-range filterfrequency selection
(Onlyformodelswithindependent
powersupplies)
Speed loop proportional
gainThe responsecharacteristics of the
ServoSystemin accelerating or
decelerating operation will change by
adjusting thisgain.
Adjust thisgaintosuppress the
overshooting orundershooting of the
ServoSystemand improvethe
responsecharacteristics of the Servo
System.
U:Speed loop gain
H:Speed loop proportionalgain
M: Inertiaratio
R:ACgain(See note 1)
Speed loop integralgainThe responsecharacteristics of the
ServoSysteminslowoperation will
change byadjusting thisgain.
Usethisgainto adjust the servo-lock
strength of the ServoSystem.
U:Speed loop integraltimeconstant
(See note 2)
H:Speed loop integralgain
M:Speed gain
R:ACgain
Position loop
proportionalgainThe positioning time of the Servo
Systemwill change byadjusting this
gain.
Adjust thisgaintosuppress the
overshooting orundershooting of the
ServoSystemand minimizethe
positioning time.
U:Position loop gain
H:Position loop proportionalgain
M:Position gain
R:Loop gain
(Onlyformodelswith pulse-traininput)
Note 1.The ACgain of the RSeries variesthe speed loop proportionalgain and speed loop integral
gainsimultaneously.Fordetails,referto1-3SpecialAdjustmentParameters.
Note 2.The integralgain of the speed loop of the USeriesisadjusted withthe speed loop integraltime
constant. (Speed loop integralgainµ1/Speed loop integraltimeconstant)
GainAdjustmentChapter1
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