Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

3 Specifications and Dimensional Drawings3.8.6 Vibration Class3.9 Terms and Data for Servomotors With Gears(1) Terms for Servomotors With Standard Backlash Gears and Low-backlash GearsItemRated Input MotorSpeed (min -1 )Max. AllowableInput Motor Speed(min -1 )Rated Torque(N•m)Lost Motion(arc-min) ∗Torsion Rigidity(arc-min) ∗Angular TransmissionError Accuracy(arc-min)Terminology for Servomotors with GearsMeasurement Method/Definition* See the following graph for lost motion and torsion rigidity.StandardBacklashGearsTypical ValueLow-backlashGears− 3000 3000− 4000 4000The rated output torque of the motor is the gear input torque.The rated torque is this value multiplied by the inverse of thegear ratio and efficiency.Angular difference in the screw with a ±5% rated torqueload. (Maximum value at any four positions during output.)Highest torsion angle value on one side with a ± rated torqueload−−20 max. 3 max.27 max. 10 max.Difference in absolute accuracy for one rotation under loadand no-load conditions during output. 15 max. 6 max.LostmotionTorsionrigidityTorsionrigidityTorsionrigidity- Torque + Torque±5% Rated torqueRated torqueRated torque(2) Noise DataThe following noise data for a servomotor with a gear is for reference only and may slightly vary with the capacityand gear ratio of the servomotor.Measurement Conditions:• Scale A: 50 cm (19.7 in)• Ground Noise: 28 dB100Initial NoiseLevel (dB)501000 2000 3000 4000-1Input speed (min )3-46