43
Possible
Causes
1. MIN SPD and MAX
SPD not calibrated.
2. Field not operating
properly.
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.
Suggested
Solutions
1. Calibrate MIN SPD
and MAX SPD (page
28).
2. Check motor field
connections and
voltage.
1. Increase MAX SPD
setting (page 28).
2. Increase IR COMP
setting (page 29).
3. Check motor load.
Resize the motor and
drive if necessary.
1. Adjust the IR COMP
setting slightly CCW
until the motor speed
stabilizes (page 29).
2. Make sure motor is
not undersized for
load; adjust
TORQUE pot CW
(page 30).
Problem
Motor runs too slow or
too fast.
Motor will not reach the
desired speed.
Motor pulsates or
surges under load.
Troubleshooting
Summary of Contents for MM21051C
Page 9: ...3 Figure 2 MM21151C Dimensions ALL DIMENSIONS IN INCHES MM Dimensions...
Page 10: ...4 Dimensions Figure 3 MM21251C Dimensions ALL DIMENSIONS IN INCHES MM...
Page 11: ...5 Figure 4 MM21151C and MM21251C Back View Cased Mounting Keyhole Locations...
Page 31: ...25 Figure 12 Dynamic Braking Circuit Connection Operation...
Page 33: ...27 Calibration Figure 13 Calibration Trimpot Layouts MM21051C MM21151C MM21251C...
Page 50: ...44 Figure 23 MM21051C MM21151C and MM21251C block diagram Block Diagrams...
Page 51: ...45 Figure 24 MM21151C switching circuit connections...
Page 52: ...46 Block Diagrams Figure 25 MM21251C switching circuit connections...
Page 54: ...48 Notes...
