10. CHARACTERISTICS
10 - 7
10.3.2 Permissible load to motor inertia when the dynamic brake is used
Use the dynamic brake under the load to motor inertia ratio indicated in the following table. If the ratio is
higher than this value, the dynamic brake may burn. If there is a possibility that the ratio may exceed the
value, contact your local sales office.
The values of the permissible load to motor inertia ratio in the table are the values at the maximum rotation
speed of the servo motor.
Servo motor
Permissible load to motor inertia
ratio [multiplier]
HG-KN13_
HG-KN23_
HG-KN43_
HG-KN73_ 30
HG-SN52_
HG-SN102_
HG-SN152_
HG-SN202_ 24
HG-SN302_ 16
10.4 Cable bending life
The bending life of the cables is shown below. This graph calculated values. Since they are not guaranteed
values, provide a little allowance for these values.
a: Long bending life encoder cable
Long bending life motor power cable
Long bending life electromagnetic brake cable
SSCNET III cable using long distance cable
b: Standard encoder cable
Standard motor power cable
Standard electromagnetic brake cable
SSCNET III cable using inside panel standard cord
SSCNET III cable using outside panel standard cable
Number of bending times [time]
1 × 10
8
5 × 10
7
1 × 10
7
5 × 10
6
1 × 10
6
5 × 10
5
1 × 10
5
5 × 10
4
1 × 10
4
5 × 10
3
1 × 10
3
Bend radius [mm]
4 7 10 20 40 70 100 200
b
a
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