LEESON Chassis Mount Regenerative Control: 175721.00 - Manual (Page 52)

46 Troubleshooting
Motor pulsates or surges under load
1. IR Comp may be set too high. Adjust the IR
COMP setting slightly CCW until the motor speed
stabilizes.
2. Motor “bouncing” in and out of torque limit. Make
sure the motor is not undersized for the load;
adjust FWD TQ and REV TQ trimpots.
Motor runs too fast at the maximum speed setting
1. Check that the MIN SPD and MAX SPD settings
are not set too high.
2. If using a shunt-wound motor, check that the field
output connections are secure.
Motor will not reach the desired speed
1. Check the MAX SPD setting and increase if
necessary.
2. Check that the IR COMP setting is not set too low.
3. Check that the motor is not overloaded.
For additional assistance, contact your local Leeson
distributor, or the factory direct: phone (262) 377-
8810; fax (262) 377-9025.