— 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
9.2. Periodical check
9.2.1. Motor
2
2
3
3
t
t
y
y
p
p
e
e
2
2
5
5
t
t
y
y
p
p
e
e
9.2. Periodical Check
9.2.1. Motor
！
Caution: Do not disassemble the Motor and the resolver. If disassembling the
Motor is necessary, contact your local NSK representative.
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
Item
Checking interval
How to check
Remarks
Vibration/Noise
Daily
Touching and hearing
Watch daily changes.
Appearance
According to environment
Wipe off dust and slag.
Blow off slag.
–
Motor insulation
Once/year
Resistance test
(Disconnect the Driver Unit,
and then check the resistance
between the Motor coil and
the ground earth with 500V
Megohmmeter.)
Resistance
³
10 M
W
Full check
According to Motor
condition
Overhaul (NSK)
–
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
Item Interval Checking
point
Remarks
Retighten
screws
Once/year
Terminal block screws.
Connector fixing screws.
–
Cleaning
Once/year
Remove dust or contaminants
inside of Driver Unit.
–
Cable check
Once/year
Check for damages and cracks
of cables.
When the cable is forced to bend or
twist, checking frequency should be
increased.
