
2.SPINDLE DESIGNING AND MOTOR MOUNTING B-65342EN/01
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Insulation between winding and frame
Measure at 500VDC with mega-ohm tester. And judge according to
following.
Insulation resistance Judgment
Over 100 MΩ Good
10 to 100 MΩ
No problem in normal use. But check the
insulation on regular intervals.
1 to 10 MΩ
Special care is required. Check the insulation on
regular intervals.
Under 1 MΩ Damaged. Change the motor to the new one.
CAUTION
The measurement operation of insulation
resistance may slightly damage the insulation of a
motor. So, the minimum time and minimum number
of times to measure the resistance.