Techno Linear Motion Catalog48Technical InformationDrive Dimensioning and Calculation of Drive TorqueThe nominal drive torque consists mainly of ‘load torque’, ‘acceleration torque’ and ‘no-load torque’.DefinitionsMA[N•m]required drive torqueMLast[N•m]resulting load torqueMNLT[N•m] no load torque *Mrot[N•m] rotary acceleration torqueMtrans[N•m] acceleration torqueFX[N]feed forceFa[N]acceleration forceg[m/s2]gravity = 9.81Vmax[m/s] max feedrateFE[N]external forcem [kg]total mass to be moveda [m/s2]accelerationd0[mm]*effective diameter of pulleyP [kW]driving powerJsyn[kgm2]* mass moment of inertia of the pulleynmax[1/min] max. speedmfriction factor = 0.05r[kg/m]* specific mass of beltigear ratioME[N•m]external load torque* relevant data are given on the corresponding data sheets for each Belt Drive Slidemass of belt = r x 2 x length of feed profile/1000 m = transport mass + mass of slide + mass of beltAcceleration Torque FtransRotary Acceleration Torque MrotMtrans= Fax d02 x 1000Mrot= Jsynxnmaxx 2x a60 x VmaxFeed Force FxFx= m x g x mAcceleration Force FaFa= m x awith vertical loads, the accelerationto gravity g must be added to themass acceleration (g=9.81 m/s2)Driving Power PP = MAx nmaxx 260 x 1000Resulting Torque MLastMLast= Fxx d02 x 1000Drive Torque Formula:MA= MLast+ Mtrans+ Mrot+ MNLT + MEExternal Torque MEME= FEx d02 x 1000ppFr (a)aF2MxF1MzMyF2F1Fr (a)Fr (a)==F1F2cos asin a
