Load torguetimeOutput speedtimet1t2t3n1n3n2T1T2T3tBall screwThe weight of the carrierWμ:Coefficient of friction18SA seriesSelection Example of Planetary Gear DriveIn the case of ball screw (horizontally) forwarding1.A calculation of the load torque(1)A driving pattern2.Examination of the allowable torque(Cf. rating list) 6.48Nm > 5.81 : Average load torque 3.Examination of the peak torque(Cf. rating list) 38.89Nm > 15.92Nm Average load torque for 100W 4.Examination of the maximum torque at the time of an emergency(Cf. rating list) 5.Examination of the allowable radial load(Cf. rating list) 6.Examination of the allowable axial load(Cf. rating list) (2)The output torque in routine T2 =9.8μW・P/2πηs=4.16Nm (3)Acceleration/ Deceleration torque ①Acceleration in accelerating α1 is calculated the following formula α1=V/t1=0.01m/s2 ②Acceleration torque T1 = 9.8μWα1 = 11.76Nm Acceleration torque (T1+T2) 15.92Nm ③Acceleration in reducing α2 is calculated the following formula α2=V/t3=0.01m/s2 ④Deceleration torque T3 = 9.8μWα2 = 7.84Nm Deceleration torque (T2+T3) 12.0Nm (4)Average load torque Tm={(t1T13+t2T23+t3T33)/(t1+t2+t3)}1/3=5.81Nm (5)The decision of the reduction ratio I=Nt/n=50 Nt:Rated input speed (3000rpm) (6)The temporary selection of the model number from performance list (Select temporarily SA19S45) Select the most nearest value 45 from reduction ratio valuesNotationW n P ηs V T1 T2 T3 t1 t2 t3 μ Carrier Weight Output shaft rotation speed Screw lead Screw efficiency Load speed Acceleration torque Torque in routine Deceleration torque Time in acceleration speed Time in routine speed Time in Deceleration speed A friction coefficient of bearing and othersExplanationAn initial value / unit1200kg 60rpm 0.02m 0.9 1.20m/min ※Nm ※Nm ※Nm 2sec 30sec 3sec Define 0.1