Instruction manual

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2. LINEAR SERVO MOTOR
2.2 Inspection Items
WARNING
Before starting maintenance and/or inspection, make sure that the charge lamp is
off more than 15 minutes after power-off. Then, confirm that the voltage is safe in
the tester or the like. Otherwise, you may get an electric shock.
Any person who is involved in inspection should be fully competent to do the work.
Otherwise, you may get an electric shock. For repair and parts replacement,
contact your safes representative.
POINT
When executing a megger test (insulation resistance test), disconnect the
servo amplifier. Otherwise, a fault may occur.
Do not disassemble and/or repair the equipment on customer side.
The molded resin of the linear servo motor may lose the color. Though a fault
may not occur only for losing the color, make inspections.
It is not until the linear servo motor is mounted in equipment (built-in) that it has functions as motor. As the
protection method is IP00, it is recommended to make inspections and clean periodically.
2.2.1 Inspections on primary side (coil)
(1) Attachment of water and oil
Check that the primary side (coil) and secondary side (magnet) have not got wet with water and oil. When
the linear servo motor has got wet, the insulation on the primary side (coil) is deteriorated, which may cause
failure. Make sure to establish the mechanical structure in which water and oil are not attached to the linear
motor.
(2) Molded resin
Check for missing or cracks of the molded resin on the primary side (coil). As the insulation deterioration
and such may cause failure when missing or cracks are found in the molded resin on the primary side (coil),
replace the primary side (coil).
(3) Scratches of primary side (coil) facing secondary side (magnet)
Check the scratches of the primary side (coil) facing the secondary side (magnet). When the primary side
(coil) facing the secondary side (magnet) has scratches, replace the primary side (coil). When a foreign
matter is caught in the empty clearance between the primary side (coil) and the secondary side (magnet), a
scratch occurs on the primary side (coil). In such case, take away the corresponding matter and establish
the mechanical structure which does not catch such matters.
However, if the scratches of the primary side (coil) facing the secondary side (magnet) result in no more
than the protective coating peeled off, they can be repaired.
(4) Loose mounting screws
Check for loose mounting screws on the primary side (coil). When the mounting screws on the primary side
(coil) are loose, tighten the corresponding screws.
(5) Scratches and cracks of linear servo motor cables
Check for scratches and cracks of the linear servo motor cables. If the linear servo motor cables have any
scratches or cracks, replace the corresponding cables. Especially when the cables are moved, make
inspections periodically.