Rockwell Automation 1398-DDM-xxx ULTRA 100 Series Drives Installation Manual - Manual (Page 273)

Publication 1398-5.2 – PDF 1997
Creating Custom Motor Files D-19
Troubleshooting Custom
Motor Files
Problem Possible Causes
Motor locks at a certain location.
Motor jumps once at startup.
Motor runs away.
Low torque production.
1. Motor phasing is incorrect.
2. Hall Offset is incorrect.
3. Incorrect startup commutation.
4. Incorrect encoder phasing.
5. Incorrect pole count.
6. Incorrect encoder linecount.
High audible noise from motor.
Velocity loop difficult to stabilize.
Shaft vibration.
1. Incorrect motor resistance.
2. Incorrect motor inductance.
3. Inductance too low.
4. Electrical time constant too low.
5. Low encoder linecount.
Underdamped velocity response.
Overdamped velocity response.
1. Incorrect motor inertia.
2. Incorrect torque constant.