Aerotech XC2e, Hardware Manual, Page: 37 / 92

2.2.3.1. Stepper Motor Phasing
A stepper motor can be run with or without an encoder. If an encoder is not being used, phasing is not
necessary. With an encoder, run a positive motion command to test for correct motor phasing. Motor
phasing is important because the end of travel (EOT) limit inputs are relative to motor rotation.
If there is a positive scaling factor (determined by the CountsPerUnit parameters) and the motor moves
in a clockwise direction, as viewed looking at the motor from the front mounting flange, the motor is
phased correctly. If the motor moves in a counterclockwise direction, swap the motor leads and re-run
the command.
Figure 2-11: Positive Motor Direction
For Aerotech-supplied systems, the motor, encoder and Hall sensors are correctly configured and
connection adjustments are not necessary.
IMPORTANT : After the motor has been phased, use the ReverseMotionDirection
parameter to change the direction of “positive” motion.
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XC2e Hardware Manual 2.2.3. Stepper Motor Connections