Chapter 9 Inspections
9–2
9-1 Inspections
Periodically inspecting the following points is recommended.
(1) Are any screws on the terminal block loose? Tighten if loose.
(2) Is the connector loose?
(3) Is there any abnormal noise from the servomotor bearings or the brakes?
(4) Are any of the cables damaged or cracked? If the cable moves with the machine, carry out a
periodic inspection according to the usage conditions.
(5) Is the axis at the load coupling section misaligned?
9-2 Life parts
The guidelines for the part replacement interval are as shown below. These will differ according to the
usage methods and environmental conditions, of if an abnormality is found, the part must be
replaced.
Part name Standard replacement time Remarks
Battery unit
MDS-A-BT-2
MDS-A-BT-4
MDS-A-BT-6
MDS-A-BT-8
Seven years
Bearings 20,000 to 30,000 hours Servomotor
Oil seal 5,000 hours
The standard replacement time is
a reference time. If an
abnormality is found before the
standard replacement time is
reached, the part must be
replaced.
(1) Servomotor bearings : When used at the rated speed and rated load, replace the bearings
after about 20,000 to 30,000 hours. This will differ according to the
operation state, but if abnormal noise or vibration is found during the
inspection, the bearings must be replaced.
(2) Servomotor oil seal, V-ring : These parts must be replaced after about 5,000 hours of operation
at the rated speed. This will differ according to the operation state,
but these parts must be replaced if oil leaks, etc., are found during
the inspection.
1. Wait at least 10 minutes after turning the power OFF and check that the
input/output and voltage are zero with a tester, etc., before starting wiring
or inspections. Failure to observe this could lead to electric shocks.
2. Only qualified persons must carry out the inspections. Failure to observe
this could lead to electric shocks. Contact your dealer for repairs or part
replacements.
CAUTION
3. Do not perform a megger test (insulation resistance measurement) on the
servo amplifier. Failure to observe this could lead to faults.
4. Never disassemble or modify the unit.
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