Rockwell Automation LC-Series Linear Motor - Manual (Page 37)

Item Number 814036 - Rev C
Troubleshooting 3-7
6. Slowly and steadily move the motor by hand in one direction over the
whole travel. Monitor the waveshape as you are doing this. The Hall
signal should alternate between a high and low (squarewave) DC level of
equal duty cycle as the Hall module passes over the alternating polarity
magnets. Especially at magnet plate joints, ensure the squarewave shape
is consistent. Any changes or irregularities in the squarewave duty cycle
shape may indicate a magnet polarity problem. Note which magnet plate
the problem occurs. If a problem is suspected, first check to see if the
plate alignment tool holes are always on the same side. If correct,
contact Anorad Technical Support for further advice.