30 Chapter 2 www.aerotech.com
2.2.1.2. Unpowered Motor and Feedback Phasing
Disconnect the motor from the controller and connect the motor in the test configuration shown in Figure 2-5.
This method will require a two-channel oscilloscope, a 5V power supply, and six resistors (10,000 ohm, 1/4
watt). All measurements should be made with the probe common of each channel of the oscilloscope
connected to a neutral reference test point (TP4, shown in Figure 2-5). Wave forms are shown while moving
the motor in the positive direction.
Figure 2-5: Motor Phasing Oscilloscope Example
With the designations of the motor and Hall leads of a third party motor determined, the motor can now be
connected to an Aerotech system. Connect motor lead A to motor connector A, motor lead B to motor
connector B, and motor lead C to motor connector C. Hall leads should also be connected to their respective
feedback connector pins (Hall A lead to the Hall A feedback pin, Hall B to Hall B, and Hall C to Hall C). The
motor is correctly phased when the Hall states align with the Back EMF as shown in (Figure 2-6). Use the
CommutationOffset parameter to correct for Hall signal misalignment.
Figure 2-6: Brushless Motor Phasing Goal
Ensemble HLe Installation and Configuration
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