Hall to back emf phasing – Rockwell Automation CHPS-250 Linear Stage Installation User Manual
Page 57
Rockwell Automation Publication CHPS-UM001D-EN-P - July 2014
57
Troubleshooting
Chapter 8
Hall to Back EMF Phasing
Verify the Hall to Back EMF Phasing with this procedure.
1. With drive power OFF.
2. Verify the Hall circuit is connected to the drive as describe in the CHPS-
Series Connector Data beginning on
3. Disconnect the stage motor power leads from the drive.
4. Apply power to the Hall device by setting the drive control power to ON.
5. Slowly and steadily move the stage by hand to perform the Hall signal test,
except this time check the motor phases are in-phase with the Hall signal as
shown in the
.
Make sure the phase error between Hall signal and in-phase Back EMF
does not exceed ± 5 electrical degrees.
6. If poor results were obtained in step 5 repeat the test at the stage power
terminations to check field wiring
EXAMPLE
To observe W-U Back EMF phase polarity, connect oscilloscope probe
tip to the W phase and the common probe to the U phase.
ATTENTION: Dangerous voltages, forces and energy levels exist in servo
controlled systems. Extreme care must be exercised when operating,
maintaining or servicing the stage to prevent harm to personnel or
equipment.