Rockwell Automation DC3E Non-Regenerative DC Drive User Guide 1/4 - 2 HP, 115/230 VAC - Manual (Page 82)

74
Problem Possible
Causes
Suggested
Solutions
Troubleshooting
Motor will not
reach the
desired speed
Motor pulsates
or surges under
load
1. MAX SPD
setting is too low.
2. IR COMP setting
is too low.
3. Motor is
overloaded.
1. IR COMP is set
too high.
2. Motor “bouncing”
in and out of torque
limit.
1. Increase MAX
SPD setting.
2. Increase the IR
COMP setting.
3. Check motor
load. Resize the
motor if necessary.
1. Adjust the IR
COMP setting
slightly CCW until
the motor speed
stabilizes.
2. Make sure motor
is not undersized
for load; adjust
CURRENT LIMIT
trimpot.
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