Cable Stress; Inspection Items - Mitsubishi Electric MELSERVO-JN Series Instruction Manual

2. INSTALLATION

2.3 Cable stress

(1) The way of clamping the cable must be fully examined so that flexing stress and cable's own weight stress
are not applied to the cable connection.
(2) For use in any application where the servo motor moves, fix the cables (encoder, power supply, brake) with
having some slack from the connector connection part of the servo motor to avoid putting stress on the
connector connection part. Use the optional encoder cable within the flexing life range. Use the power
supply and brake wiring cables within the flexing life of the cables.
(3) Avoid any probability that the cable sheath might be cut by sharp chips, rubbed by a machine corner or
stamped by workers or vehicles.
(4) For installation on a machine where the servo motor moves, the flexing radius should be made as large as
possible. Refer to section 10.4 for the flexing life.

2.4 Inspection items

WARNING
CAUTION
It is recommended to make the following checks periodically.
(1) Check for loose screws. Retighten any loose screws.
(2) Check the cables and the wires for scratches and cracks. Perform periodic inspection according to
operating conditions.
(3) Make sure that the emergency stop circuit operates properly such that an operation can be stopped
immediately and a power is shut off by the emergency stop switch.
Before starting maintenance and/or inspection, turn off the power and wait for 15
minutes or more until the charge lamp turns off. Otherwise, an electric shock may
occur. In addition, always confirm from the front of the servo amplifier whether the
charge lamp is off or not.
Due to risk of electric shock, only qualified personnel should attempt inspection.
For repair and parts replacement, contact your local sales office.
Do not perform insulation resistance test on the servo amplifier as damage may
result.
Do not disassemble and/or repair the equipment on customer side.
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