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9.2. Periodical check
9.2.1. Motor
9.2. Periodical Check
9.2.1. Motor
！ Caution: Do not disassemble the Motor and the resolver. If disassembling the
l Since the Megatorque Motors do not have any parts that will wear out, a daily maintenance
check should be enough. The table below shows the maintenance check and intervals. The
checking interval shown in the table is reference only. It should be decided according to the
actual use conditions.
Table 9-1
Vibration/Noise
Appearance
Motor insulation Once/year
Full check
9.2.2. Driver Unit and Cable Set
l Because the Driver Unit does not have any contact point, and highly reliable semiconductors are
used, the daily check is not necessary. Checks shown in Table 9-2 are necessary at least once a
year.
Table 9-2
Retighten
screws
Cleaning
Cable check
Motor is necessary, contact your local NSK representative.
Item
Checking interval
Daily
According to environment
According to Motor
condition
Item
Interval
Terminal block screws.
Once/year
Connector fixing screws.
Remove dust or contaminants
Once/year
inside of Driver Unit.
Check for damages and cracks
Once/year
of cables.
How to check
Touching and hearing
Wipe off dust and slag.
Blow off slag.
Resistance test
(Disconnect the Driver Unit,
and then check the resistance
between the Motor coil and
the ground earth with 500V
Megohmmeter.)
Overhaul (NSK)
Checking point
When the cable is forced to bend or
twist, checking frequency should be
increased.
— 9-2 —
B
B
3
3
t
t
y
y
p
p
e
e
B
B
5
5
t
t
y
y
p
p
e
e
2
3
t
y
p
e
2
5
t
y
p
e
2
3
t
y
p
e
2
5
t
y
p
e
Remarks
Watch daily changes.
–
Resistance ³ 10 MW
–
Remarks
–
–
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