>> P.438
MaximumSpeedandResolution■MaximumspeedThemaximumspeedofaprecisionpositioningtableisdefinedbythefollowingequation.Theballscrewdrivetypeisrestrictedbytheallowablenumberofballscrewrevolutions,whichvarybythestrokelength.Forthetimingbeltdrive,itiscalculatedwiththemaximumnumberofmotorrevolutionsof900(min-1).Seethespecificationsofeachmodelfordetails.Eachlinearmotordrivemodelhasafixedmaximumspeed.Seethespecificationsofeachmodelformoredetails.BallscrewdriveMaximumspeed(mm/s)=Ballscrewlead(mm)×Allowablenumberofrevolutionsofballscrew(min)-160TimingbeltdriveMaximumspeed(mm/s)=Pulleypitchdiameter×π(mm)×Maximumnumberofrevolutionsofthemotor(min)-160(Pulleypitchdiameter×π=100mm)Toobtaintheactualpositioningtime,theoperationpatternmustbeconsideredbasedonconditionssuchasacceleration/decelerationtime,andstrokelength.Seethesectiononconsiderationofoperationpatterns.■ResolutionResolutionreferstotheminimumfeedrateallowedforprecisionpositioningtablesandcanbeobtainedbythefollowingequation.Eachlinearmotordrivemodelhasafixedresolution.Seethespecificationsofeachmodelformoredetails.BallscrewdriveTimingbeltdriveResolution(mm/pulse)=Numberoffractionsizespermotorrotation(pulse)Ballscrewlead(mm)Resolution(mm/pulse)=Pulleypitchdiameter×π(mm)Numberoffractionsizespermotorrotation(pulse)(Pulleypitchdiameter×π=100mm)MotorAxisRotationDirectionsMotoraxis(shaft)rotationdirectionsaredefinedasshownbelow.Whenareducerismountedtothemotor,therotationdirectionofthereduceroutputshaftmaybetheoppositeofthatshownforCWandCCWbelow.MotoraxisMotoraxisMotorunitCWMotorunitCCWMotoraxisrotationdirectionCW(ClockwiseRotation)Rotatestotheright(clockwise)whenlookingatthemotorunitfromthemotoraxis.MotoraxisrotationdirectionCCW(CounterClockwiseRotation)Rotatestotheleft(counterclockwise)whenlookingatthemotorunitfromthemotoraxis.Ⅲ22
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