Allen-Bradley MPAI-A C Series Installation Instructions Manual page 50

MP-Series Heavy-duty Electric Cylinders
Troubleshooting Electric Cylinders (continued)
Description
Electric cylinder is operating but is not
up to rated speeds/forces.
Electric cylinder cannot move load.
Electric cylinder moves or vibrates
when thrust rod is in motion.
Actuator is overheating.
50
Possible cause
Motor phases are wired incorrectly
or in incorrect order.
Amplifier can be improperly tuned.
Amplifier can be configured
improperly for electric cylinder used.
Force is too large for the capacity of
the electric cylinder or too much
friction is present.
Misalignment of thrust rod to load.
Amplifier has too low of current
capacity or is limited to too low of
current capacity.
Loose mounting.
Amplifier is improperly tuned or
gain setting is wrong.
Duty cycle is higher than actuator
rating.
Actuator operated outside of
continuous rating.
Amplifier is poorly tuned, requiring
excessive current be applied to the
motor.
Rockwell Automation Publication MPAI-IN001F-EN-P - January 2016
Corrective action
Verify correct motor power wiring.
Verify gain settings.
Verify amplifier setting for number of poles,
voltage, current, resistance, inductance,
inertia, and other motor settings.
Verify force requirements.
Verify load alignment.
Verify correct amplifier and settings.
Verify actuator mounting.
Tune amplifier.
Verify load forces and electric cylinder rating.
Adjust operation to be within continuous
operation rating.
Verify gain settings.