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YASKAWA SGDM Series User Manual

YASKAWA SGDM Series
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3.10 Terms and Data for Servomotors With Gears
3-51
3
3.10 Terms and Data for Servomotors With Gears
(1) Terms for Servomotors With Standard Backlash Gears and Low-backlash Gears
* See the following graph for lost motion and torsion rigidity.
(2) Noise Data
The following noise data for a servomotor with a gear is for reference only and may slightly vary with the capac-
ity and gear ratio of the servomotor.
Terminology for Servomotors with Gears
Item Measurement Method/Definition
Typical Value
Standard
Backlash
Gears
Low-back-
lash Gears
Rated Input Motor
Speed (min
-1
)
3000 3000
Max. Allowable
Input Motor Speed
(min
-1
)
4000 4000
Rated Torque
(Nxm)
The rated output torque of the motor is the gear input torque.
The rated torque is this value multiplied by the inverse of the
gear ratio and efficiency.
−−
Lost Motion
(arc-min)
Angular difference in the screw with a ±5% rated torque
load. (Maximum value at any four positions during output.)
20 max. 3 max.
Torsion Rigidity
(arc-min)
Highest torsion angle value on one side with a ± rated torque
load
27 max. 10 max.
Angular Transmis-
sion Error Accuracy
(arc-min)
Difference in absolute accuracy for one rotation under load
and no-load conditions during output.
15 max. 6 max.
Lost
motion
Torsion
rigidity
Torsion
rigidity
Torsion
rigidity
- Torque
+ Torque
Rated torque
Rated torque
±5% Rated torque
Measurement Conditions:
• Scale A: 50 cm (19.7 in)
• Ground Noise: 28 dB
1000 2000 3000
4000
50
100
Input speed (min )
-1
Initial Noise
Level (dB)
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YASKAWA SGDM Series Specifications

General IconGeneral
BrandYASKAWA
ModelSGDM Series
CategoryServo Drives
LanguageEnglish

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