WD timetimet1t2t3n1n3T1T2T3tOutput speedLoad torguen216SA seriesSelection Example of Planetary Gear DriveIn the case of Turn Table Drive1.A calculation of the load torque(1)A driving pattern2.Examination of the allowable torque(Cf. rating list) 29.16Nm>25.32Nm:Average load torque 3.Examination of the peak torque(Cf. rating list) 87.48Nm > 68.83Nm (Big one of acceleration / the decelerating torque) 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)Output torque in routine T2=9.8μW・r=10.29Nm (3)Acceleration/ Deceleration torque ①GD2=1/2W・D2=5.60kgm2 ②Acceleration torque T1=9.8GD2・n1/375・t1=29.27Nm・・・Acceleration torque (T1+T2) 39.56Nm ③Deceleration torque T3=9.8GD2・n3/375・t3=58.54Nm・・・Deceleration torque (T2+T3) 68.83Nm (4)Average load torque Tm={(t1T13+t2T23+t3T33)/(t1+t2+t3)}1/3=25.32Nm (5)The decision of the reduction ratio I=Nt/n2=25 Nt:Rated input speed(3000rpm) (6)The temporary selection of the model number from performance list(Select temporarily SA19S25) Select the most nearest value 25 from reduction ratio values.Machine constitution (a diagrammatical view)NotationW D T1 T2 T3 n1 n2 n3 t1 t2 t3 μ rA device and work weight The outer diameter of the device Acceleration torque Torque in routine Deceleration torque Average number of revolutions in accelerating speed Number of revolutions in routine speed Average number of revolutions in Deceleration speed Time in acceleration speed Time in routine speed Time in Deceleration speed A friction coefficient of bearing and others The center radius of the bearing ExplanationAn initial value / unit70kg 0.4m Nm Nm Nm 60rpm 120rpm 60rpm 0.3sec 1sec 0.15sec Define 0.1 0.15m