Rockwell Automation LZ Series Linear Motors - Manual (Page 22)

Publication LZ-UM001A-EN-P - January 2008
22 Troubleshooting
6. Check for the proper logic levels (approximately 0V = low, +V = high)
and the sequence: S1 leads S2 leads S3 with approximately 120 electrical
degree spacing in between.
Hall to Back EMF Phasing
1. Turn the drive power OFF.
2. Verify the Hall circuit is connected to the drive per interface wiring
specifications.
3. Disconnect the motor leads from the drive.
4. Turn the Hall power supply ON (driver power ON).
5. While slowly and steadily moving the motor by hand, perform the Hall
Signal Test except this time check the motor phases are in-phase with
the specific Hall signal per the Motor Phasing Diagram. The phase error
between the Hall signal and the in-phase Back EMF should be within
±
5 electrical degrees.
PTC Thermal Signal At ambient room temperature, approximately 25 ° C (77 ° F), the resistance
measurement between PTC Temp+ and Common should be
≤
300
Ω
.
The table lists the increase in resistance at higher temperatures outside the
normal operating temperature envelope.
PTC Thermistor Signal Characteristics
TIP
Connect the probe common to the Hall signal common.
IMPORTANT
Observe the Back EMF phase polarity.
Back EMF U-V means:
Probe tip on U phase and probe common on V phase
Temperature °C (°F) Resistance in Ohms
Up to 25 (77)
≤ 300
Up to 125 (257)
≤ 1500
Up to 135 (275)
≥ 4000