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Motor & Resolver Circuitry
Electrical
Troubleshooting Guide
IRB6400 M94A
Motors (Cont)
Troubleshooting of a motor should first consist of
checking to make sure the motor and the brake releases
allowing the motor to turn freely. Then troubleshoot a
motor by checking the motor’s coil resistance. The
motor coil resistance should be approximately .5 - 2
ohms. Also check resistance to ground. A Meggar may
be used to check resistance to ground. Resistance to
ground should be greater than 10 Megohms. Repeated
use of a Meggar may cause deterioration of motor
magnets.
Replacement of a motor requires the performance of
the calibration procedure and to update counter values.
(See Chapter 10 - Calibration Procedures). When a
motor is replaced, the shaft on the old motor must be
removed and placed on the new motor.
Use caution not to pound on the motor shaft this
will cause serious motor damage.
Sheets 105-110............
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