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Technical Details
The waveforms created by the motor phasing can be observed using a wye resistor
network, a dual trace oscilloscope, and performing the following steps.
5-12
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Motor Mounting
Plate (Front View)
CW Rotation
(Positive Direction)
Figure 5-12.
Motor Rotation (From Mounting Flange End)
The following procedure is only necessary if the user has to replace a defective
encoder or is using a non-Aerotech motor.
Motor voltage is monitored without power applied to the motor.
Before performing the following steps, remove all connections to the motor except
the wye resistor network. Remove all mechanical connections to the motor shaft.
1.
Connect the ends of three resistors to motor terminals A, B, C. Refer to
Figure 5-13.
2.
Use one channel of the oscilloscope to monitor motor terminal A with
respect to the "Wye" neutral (the point where all resistors are connected
together), refer to Figure 5-13.
3.
Connect a 5V power supply to the power pins of the encoder, refer to
Figure 5-14.
4.
Connect the second channel of the oscilloscope to Hall effect A on the
encoder.
5.
Once the oscilloscope is connected with one probe monitoring a motor
phase and the other monitoring a Hall effect signal, rotate the motor by hand
using the motor shaft. The motor will generate a voltage upon rotation.
6.
Observe the phase relationship of the motor phase to the Hall effect signal.
Aerotech, Inc.
BA SineDrive User's Manual
Motor Mounting
Plate (Front View)
Motor Shaft
CCW Rotation
(Negative Direction)
Version 1.4
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