Installation and Configuration
Npaq MR Hardware Manual
2.3.1.2. Unpowered Motor and Feedback Phasing
Disconnect the motor from the controller and connect the motor in the test configuration shown in
.
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
). Wave forms are shown while moving
the motor in the positive direction.
TP5
TP4
COM
+5V
COM
+5V
10K OHM
TYP
"Wye"
Configuration
10K OHM
TYP
Motor Lead 3
=
ØA
Motor Lead 1 =
ØB
Motor Lead 2
=
ØC
Power Supply
TP3
TP2
TP1
TP6
TP7
Hall 1
Hall 2
Hall 3
CHANNEL 1
CHANNEL 2
Figure 2-7:
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. Connect Hall lead A to Pin 10 of the feedback
connector. Hall lead B should connected to Pin 5 and Hall lead C should connect to Pin 11 of the feedback
connector. The motor is correctly phased when the Hall states correspond to the states at each of the
electrical angles (
).
240°
300°
360°
120°
180°
60°
0°
5
6
3
4
2
1
ØA
ØB
ØC
ØB
ØC
+V
+5V
0V
0V
-V
Hall A
Hall B
Motor Back
EMF
Hall C
Figure 2-8:
Brushless Motor Phasing Goal
www.aerotech.com
Chapter 2
21
