National Instruments NI-Motion - Manual (Page 282)

Appendix A Sinusoidal Commutation for Brushless Servo Motion Control
© National Instruments Corporation A-3 NI-Motion User Manual
Troubleshooting Hall Effect Sensor Connections
Complete the following steps if you have problems with Hall effect sensor
connections.
1. Check the manuals that shipped with the hardware for connection
procedures.
2. Perform a “shake and wake” phase initialization. During this process,
the motor is driven to the zero degree phase position with the
commanded voltage. Make sure the motor is clear of any limits before
you start.
3. Record the Hall effect sensors states by reading the DIO lines
connected to the Hall sensors. Refer to the hardware documentation for
the Hall effect sensor lines. This is the state of the Hall effect sensors
at the zero-degree phase position.
4. Command the motor to move forward at a slow velocity. Record the
state of the Hall effect sensors at each state transition. The state of the
Hall effect sensors should return to the state recorded in step 2 after
six state transitions.
5. Use the Hall sensors transition state as the Hall sensors diagram. Refer
to the hardware documentation for more information on Hall sensor
diagrams. Follow the procedure outlined in the hardware
documentation.