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Technical Details
Motor Mounting
Motor Mounting
Plate (Front View)
Plate (Front View)
Motor Shaft
CCW Rotation
CW Rotation
(Positive Direction)
(Negative Direction)
5-10
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5.4.1. Encoder Interface
The encoder interface requires square wave signals from a line driver differential output
encoder. Figure 5-8 illustrates the encoder phasing with relation to motor rotation.
Additionally, as part of each encoder interface, there are inputs for marker signals that are
received by a differential input comparator circuit.
incremental encoders. The theoretical max encoder input frequency is 2.5 MHz. The
minimum edge separation is 1/10 MHz.
Figure 5-8.
CW Motor Rotation (Viewed from the Mounting Flange End)
The encoder signals are terminated with 180 ohm resisters, refer to Figure 5-9.
Consequently, the encoder must be able to drive the BAS and external controller encoder
interface.
S IN , C O S
S IN -N , C O S -N
Figure 5-9.
5.4.2. Hall Effect Interface
The Hall effect switches form a digital representation of the motor phasing that the
microprocessor uses to commutate the motor. This digital representation comprises three
5 volt signals that form a digital six step pattern. The controller receives these signals with
a circuit that is electrically identical to the limit input circuit. Refer to Figure 5-10 for Hall
effect input circuitry.
Aerotech, Inc.
BA SineDrive User's Manual
These signals are standard on
COS
COS-N
SIN
SIN-N
MKR
MKR-N
1 8 0
S N 7 5 1 5 7
Encoder Input Circuit
Version 1.4
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