Rockwell Automation 1398-DDM-xxx USE MNL/ULTRA 200 DIG.SERVO.DR - Manual (Page 280)

Publication 1398-5.0 – October 1998
D-16 Creating Custom Motor Files
Custom Motor File
The custom motor file parameters are as follows:
Troubleshooting Custom
Motor Files
GENERAL CURRENT LOOP
Motor Model: A_CUSTOM Current Feedforward: 0 degrees / kRPM
Table ID: -1
Motor File: CUSTOM21.MTR ELECTRICAL
Motor Type: Synchronous Resistance: 7.4 Ohms
Number of Poles: 8 Inductance: 10.0 mH
Kt: 0.61 N-m/Amp
Jm: 2.26 kg-cm
2
RATINGS
Ke: 44.0 Volts/kRPM Continuous Torque: 1.4 Amps
Peak Torque: 3.8 Amps
Thermal Time Constant: Checked, 1800 sec
FEEDBACK Integral Thermostat: Unchecked
Linecount: 1500 lines/rev Maximum Speed: 4000 RPM
Index Offset: 0 degrees
Hall Offset: 120 degrees
Startup Commutation: Hall / Hall
Invert Direction: Unchecked
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.