Other Precautions - YASKAWA Sigma-V Series User Manual

3.2.5

Other Precautions

 Handling Oil and Water
If the servomotor is used in a location that is subject to water or oil mist, use a servo-
motor with an oil seal to seal the through shaft section. Precautions on using a servo-
motor with an oil seal are described below.
• Put the oil surface under the oil seal lip.
• Use an oil seal in favorably lubricated condition.
• When using a servomotor with its shaft upward direction, be sure that oil will not
stay in the oil seal lips.
 Cable Stress
Make sure there is no bending or tension on the cables themselves, the connections,
or the cable lead inlets.
Be especially careful to wire encoder cables so that they are not subject to stress
because the core wires of encoder cables are very thin at only 0.2 to 0.3 mm
 Connectors
Observe the following precautions:
• When you connect the cables to the servomotor, connect the servomotor's main
circuit cable first. If you connect the encoder cable first, the encoder may be dam-
aged due to the difference in electrical potential from the FG.
• Make sure there is no foreign matters such as dust and metal chips in the connector
before connecting.
• Do not apply shock to connectors. Otherwise, they may be damaged.
• Before you connect the wires, make sure that there are no mistakes in the wiring.
• Be sure not to apply stress on the connector. The connector may be damaged by
stress.
• If you move the servomotor while the cables are connected, always hold onto the
main body of the servomotor. If you lift the servomotor by the cables when you
move it, the terminals may be damaged or the cables may be broken.
 Radial and Thrust loads
Design the mechanical system so thrust and radial loads applied to the servomotor
shaft end during operation fall within the allowable ranges of each motor. For the
allowable ranges, refer to Large-Capacity
3.2 Servomotor Installation
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-V Series Product Catalog.
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