Manual

19
BRAY Series 70 Servo Pro
Operation and Maintenance Manual
BRAY Series 70 Servo Pro
Operation and Maintenance Manual
Problem Possible Cause Possible Solutions
Actuatormovesbackand
forthnearsetpoint(hunts)
Signalisuctuatingbeyondthe
deadbandsetting
Increasethedeadbandusingthe
Deadbandtrimpot
Signalhasinterference Shieldsignalfrominterference.
Actuator does not travel fully
open or fully closed
Travellimitswitchesarenot
set correctly
Settravellimitswitchesfor90°operation
ServoDIPswitchesarenot
set correctly
SeeQuickSetupInstructionsonpage9.
Mechanicaltravelstopsarenot
set correctly
Setmechanicaltravelstopsjustoutside
theelectricaltravellimitswitchpositions
Actuator motor does not run
ineitherdirectionandthe
greenPowerLEDisoff
PowerdoesnotmatchServoPro
voltageandphase,fuseismissing
orblown,poweristurnedoff
Verifyfuse,verifypowervoltageand
phase,turnpoweron&recalibrate
Actuator motor does not run
ineitherdirectionandthe
greenPowerLEDison
Limitswitchesortorqueswitches
are activated
Verifythatthetravellimitswitchesare
properlyset;verifytorqueswitchesare
presentsorsetcongurationtoTorque
SwitchDisabled
Handwheelisengaged Pushhandwheelin(disengage)
ServoProisnotwiredcorrectly CheckallServoProwiring
Motorhasthermallytripped Allowmotortocooldown
Actuator does not
properly respond to a
commandsignal
Potentiometergearisnotengaged
oradjustedproperly
Engageandadjustpotentiometergear
Commandsignaldoesnotmatch
Congurationswitches
SettheCongurationswitchescorrectly
Commandsignalisfaultyorwired
incorrectly
Verifythevalueofthecommandsignal
withameterandverifythewiringpolarity
is correct.
Actuator runs in one
direction only
Wiringisincorrect CorrectWiring
Potentiometerwiredbackwards
Reversewhiteandgraywires,seewiring
diagraminsidecover
Limitswitchortorqueswitch
is activated
Verifycontinuitybetweenthewirescoming
fromtheswitches.Ifyouractuatorhas
reacheditstravellimit,reversedirection.
Ifoneofyourtorqueswitcheshastripped,
reversetheactuatordirectionandcorrect
theovertorquecondition
Commandsignalisfaultyor
wiredincorrectly
Verifythevalueofthecommandsignal
withameterandverifythewiringpolarity
is correct
6.2 troublesHooting cHart