>> P.423
â…¢23ConsiderationofOperationPatternsLong-distancepositioningLongdistanceinthiscontextreferstothedistanceforwhichthereisenoughconstantspeedtravelingtimewhentakingintoaccounttheacceleration/decelerationtime.L1ta+tbt=++tdV12wheret:Positioningtimesta,tb:Acceleration/decelerationtimestc:Constantspeedtravelingtimestd:SettlingtimesL1:TravelingdistancemmV1:Travelingspeed(setspeed)mm/sShort-distancepositioningShortdistanceinthiscontextreferstothedistanceforwhichthereisnoconstantspeedtravelingtimebecausedecelerationoccursbeforereachingconstantspeed.L2ta+tbt=++tdV22wheret:Positioningtimesta,tb:Acceleration/decelerationtimestd:SettlingtimesL2:TravelingdistancemmV1:Setspeedmm/sV2:Travelingspeedmm/sTablemovementTravelcommandTimeTravelingdistanceL1tatcttbtdV1SpeedTablemovementTravelcommandTimetattbtdV2V1SpeedTravelingdistanceL2â– CalculationofpositioningtimeThepositioningtimetakenwhentheprecisionpositioningtableactuallymovescanbeobtainedbythefollowingequation.Forapplicationsrequiringhighprecisionpositioning,thesettlingtimefromcompletionofcommandpulseinputtofullstopofthetableatthepositioningpointandvibrationdampingtimeofthemachinedevicemustbeconsideredinadditiontotheconstantspeedtravelingtimeandacceleration/decelerationtime.
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