>> P.422
Ⅲ22MaximumSpeedandResolution■MaximumspeedThemaximumspeedofaprecisionpositioningtableisdefinedbythefollowingequation.Theballscrewdrivetypeisrestrictedbytheallowablenumberofballscrewrevolutions,whichvarybythestrokelength.Forthetimingbeltdrive,itiscalculatedwiththemaximumnumberofmotorrevolutionsof900(min-1).Seethespecificationsofeachmodelfordetails.Eachlinearmotordrivemodelhasafixedmaximumspeed.Seethespecificationsofeachmodelformoredetails.Toobtaintheactualpositioningtime,theoperationpatternmustbeconsideredbasedonconditionssuchasacceleration/decelerationtime,andstrokelength.Seethesectiononconsiderationofoperationpatterns.BallscrewdriveMaximumspeed(mm/s)=Ballscrewlead(mm)×Allowablenumberofrevolutionsofballscrew(min)60TimingbeltdriveMaximumspeed(mm/s)=Pulleypitchdiameter×π(mm)×Maximumnumberofrevolutionsofthemotor(min)60(Pulleypitchdiameter×π=100mm)1-1■ResolutionResolutionreferstotheminimumfeedrateallowedforprecisionpositioningtablesandcanbeobtainedbythefollowingequation.Eachlinearmotordrivemodelhasafixedresolution.Seethespecificationsofeachmodelformoredetails.BallscrewdriveResolution(mm/pulse)=Ballscrewlead(mm)Numberoffractionsizespermotorrotation(pulse)TimingbeltdriveResolution(mm/pulse)=Pulleypitchdiameter×π(mm)Numberoffractionsizespermotorrotation(pulse)(Pulleypitchdiameter×π=100mm)Motoraxis(shaft)rotationdirectionsaredefinedasshownbelow.henareducerismountedtothemotor,therotationdirectionofthereduceroutputshaftmaybetheoppositeofthatshownforCWandCCWbelow.MotorAxisRotationDirectionsMotoraxisMotorunitCWCCWMotorunitMotoraxisMotoraxisrotationdirectionCW(ClockwiseRotation)Rotatestotheright(clockwise)whenlookingatthemotorunitfromthemotoraxis.MotoraxisrotationdirectionCCW(CounterClockwiseRotation)Rotatestotheleft(counterclockwise)whenlookingatthemotorunitfromthemotoraxis.
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