Chapter 3 Installation
3-9
3-2-6 Cable stress
CAUTION
1. Sufficiently consider the cable clamping method so that bending stress and
the stress from the cable's own weight is not applied on the cable
connection. Failure to observe this could lead to damage of the cable
sheath and electric shocks.
2. Make sure that the cable sheathes will not be cut by sharp cutting chips,
worn by contacting the machine corners, or stepped on by workers or
vehicles. Failure to observe this could lead to damage of the cable sheath
and electric shocks.
3. In applications where the servomotor moves, make sure that excessive
stress is not applied on the cable.
If the detector cable and servomotor wiring are stored in a cable bear and
the servomotor moves, make sure that the cable bending section is within
the range of the optional detector cable.
Fix the detector cable and power cable enclosed with the servomotor.
The bending life of the detector cable is as shown below. Regard this with a slight allowance. If the
servomotor is installed on a machine that moves, make the bending radius as large as possible.
4 7 10 20 40 70 100 200
1×10
8
5×10
7
2×10
7
1×10
7
5×10
6
2×10
6
1×10
6
5×10
5
2×10
5
1×10
5
5×10
4
3×10
4
No. of bends (times)
Bending radius (mm)
Detector cable bending life
(The optional detector cable and wire of our company: A14B2343)
Note: The values in this graph are calculated values and are not guaranteed.
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