Installation and Configuration
Npaq MR Hardware Manual
2.4.1.3. Encoder Phasing
Incorrect encoder polarity will cause the system to fault when enabled or when a move command is issued.
illustrates the proper encoder phasing for clockwise motor rotation (or positive forcer movement
for linear motors). To verify, move the motor by hand in the CW (positive) direction while observing the
position of the encoder in the diagnostics display (see
). The MsetDebug.Pgm program can be
used if the motor can not be moved by hand. If the program causes the Position Feedback to count more
negative, swap the connections to the controllers SIN and the SIN-N encoder inputs.
For dual loop systems, the velocity feedback encoder is displayed in the diagnostic display (
).
MRK
MRK-N
Positive MOVE (Clockwise)
Forcer Wires
Forcer
Magnet Track
Motor Mounting
Flange (Front View)
Motor Shaft
CW Rotation
(Positive Direction)
LINEAR MOTOR
ROTARY MOTOR
Positive MOVE
(Clockwise)
0°
90°
180°
270°
360°
450°
540°
630°
720°
810°
SIN
SIN-N
0°
90°
180°
270°
360°
450°
540°
630°
720°
810°
COS
COS-N
0°
90°
180°
270°
360°
450°
540°
630°
720°
810°
1V
pk-pk
Figure 2-16:
Encoder Phasing Reference Diagram (Standard)
N O T E :
Encoder manufacturers may refer to the encoder signals as A, B, and Z. The proper phase rela-
tionship between signals is shown in
.
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Chapter 2
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