>> P.428
Ⅲ28■ConsiderationexampleofoperationpatternIfACservomotorisused●UsageconditionsMountingdirectionHorizontalusageCarryingmassW30kgStrokelengthL300mmTravelingspeed(setspeed)V300mm/sAcceleration/decelerationtimeta0.2sConstantspeedtravelingtimetc0.8s1cycletimet2.0s●TemporaryselectionofpositioningtableTemporarilyselectTU60S49/AT103G10S03.BasicspecificationBallscrewleadℓ10mmStrokelength300mmMaximumspeed500mm/sStartingtorqueTs0.08N・mTableinertiaJT0.93×10-5kg・m2CouplinginertiaJC0.290×10-5kg・m2●MotorspecificationACservomotorusedSGMAV-01ARatedtorque0.318N・mMotorinertiaJM0.380×10-5kg・m2TimesStrokelengthTimes2.00.20.80.2TaTPTLSpeedmm/s300300mmTorqueN.m●Calculationoftorquerequiredforacceleration・AppliedtorqueTLℓTL=Ts+μWg・2πη0.01=0.08+0.01×30×9.8×2×π×0.9≒0.09N・m・AccelerationtorqueTaℓJL=W・()22π0.01=30×()2≒7.60×10-5kg・m22×π6060N=V×=0.3×=1800min-1ℓ0.012πNTa=(JT+JM+JC+JL)・60ta2×π×1800=(0.93+0.380+0.290+7.60)×10-5×60×0.2≒0.09N・m・TorquerequiredforaccelerationTPTP=TL+Ta=0.09+0.09=0.18N・mAtthispoint,checkthattheTP×k(factorofsafety)issmallerthanmotor'soutputtorqueTM.Ifthisvalueisexceeded,reviewthemaximumspeedandacceleration/decelerationtime.Fortheoperationpatternunderconsideration,itissmallerthantheoutputtorqueTMasindicatedbelow.TM=0.318×3≒0.95N・mTP×k=0.18×1.3=0.23N・m<TM●Considerationofeffectivetorque・EffectivetorqueTrmsTrms==≒0.09NmAsmotor'sratedtorqueislargerthantheeffectivetorqueTrms,itcanbejudgedthatcontinuousoperationintheoperationpatternunderconsiderationispossible.TP2×ta+(TP-2×TL)2×ta+TL2×tct0.232×0.2+(0.23-2×0.09)2×0.2+0.092×0.82.0
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