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Troubleshooting
111
TROUBLESHOOTING TABLE
SOLUTION
MOTOR
MECHANICAL
SYSTEM
WIRING
OVERHEATING
AC POWER
MOVE PROBLEMS
ELECTRICAL NOISE
Check for motor problems. Check motor coils for continuity,
shorts, proper resistance. Check Hall and Phase wiring.
Check for jams, binds, increased friction, etc.
Uncouple motor from load to test motor separately.
Check motor wiring: phases, Hall effects.
Check I/O wiring, especially enable.
Verify that drive's heatplate has good thermal contact with
Verify AC power mains supply delivers enough power during
entire move without undervoltage, especially during acceleration.
Check speed/torque limitations. Check for excessive friction,
regeneration, problems with gravity, transient undervoltage, etc.
Check for problems caused by electrical noise. Consult the
heatsink. Check mounting screws. Provide sufficient ventilation.
Compumotor sales guide for possible solutions. Check grounds.
Possible Source
of Problem
Problems During Move
Some problems occur transiently during a move, or do not affect the LEDs. Others
may be due to wiring mistakes, or failure of other components in the system
(encoder, motor, etc.). The sections below will help you identify such problems.
Speed/Torque Limitations
Make sure that you are not commanding a move that requires the motor to go
faster than it can, or use more torque than it can produce. Check the motor's speed/
torque curve for your operating conditions.
Acceleration
Some problems during acceleration can be caused by an undervoltage on the AC
power line (this can be a transient event), an unrealistic move profile, or too much
load inertia.
Deceleration
Some problems during deceleration can be caused by excessive regeneration,
resulting in an overvoltage fault.
Excessive Friction
Too much friction in your system might cause move problems. Excessive friction
can cause trouble when mechanical components in a system age. As friction
increases, problems may occur in a system that had previously been working well.
Mechanical Problems
Check for binds, jams, increased friction, or other problems in the mechanical
system. If a system was working properly, but then suddenly develops new
problems, check for changes in the mechanical system that could be causing the
problems—increased friction, lack of grease, worn bearings, etc.
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