9.5 Wiring Servomotors and SERVOPACKs
9.5.1 Wiring Precautions
9-30
Grounding Precautions
The ground terminal on the SERVOPACK is used to ground the Servomotor.
Precautions for Standard Cables
Do not use standard cables in applications that require a high degree of flexibility, such as
twisting and turning, or in which the cables themselves must move. When you use Standard
Cables, observe the recommended bending radius given in the following table and perform all
wiring so that stress is not applied to the cables. Use the cables so that they are not repeatedly
bent.
Precautions for Flexible Cables
•
The Flexible Cables have a service life of 10,000,000 operations minimum when used at the
recommended bending radius of 90 mm or larger under the following test conditions. The
service life of a Flexible Cable is reference data under special test conditions. The service life
of a Flexible Cable greatly depends on the amount of mechanical shock, how the cable is
attached, and how the cable is secured.
Test Conditions
•
One end of the cable is repeatedly moved forward and backward for 320 mm using the test equip-
ment shown in the following figure.
•
The lead wires are connected in parallel, and the number of cable return operations until a lead wire
breaks are counted. One round trip is counted as one bend.
Note: The service life of a Flexible Cable indicates the number of bends while the lead wires are electrically
charged for which no cracks or damage that affects the performance of the cable sheathing occur.
Breaking of the shield wire is not considered.
Cable Diameter
Recommended Bending Radius [R]
Less than 8 mm
15 mm min.
8 mm
20 mm min.
Over 8 mm
Cable diameter
×
3 mm min.
SERVOPACK
Servomotor
Ground terminal
Bending
radius = 90 mm
Travel distance: 320 mm
Fixed end
End of travel