Installation and Configuration
Npaq MR Hardware Manual
2.4.1.2. Analog Encoder Interface
If the -MXH/-MXU option has been purchased, the standard encoder channel will accept a differential analog
encoder input signal. The interpolation factor is software selectable (refer to the A3200 Help file).
Table 2-10:
Analog Encoder Specifications
Specification
MP Value
ML Value
Input Frequency (max)
200 kHz
500 kHz
Input Amplitude
0.6 to 2.25 V
pk
-V
pk
0.6 to 2.25 V
pk
-V
pk
Interpolation Factor (software selectable)
4,096
4,096 (for the -
MXU option),
65,536 (for the -
MXH option)
Refer to
for the MXU/MXH typical input circuitry.
The encoder interface pin assignment is indicated in
The gain, offset, and phase balance of the analog Sine and Cosine encoder input signals can all be adjusted
via controller parameters. Encoder signals should be adjusted using the Feedback Tuning tab of the Digital
Scope, which will automatically adjust the encoder parameters for optimum performance. See the
A3200 Help file for more information.
Forcer Wires
SIN
SIN-N
COS
COS-N
MRK
MRK-N
Forcer
Magnet
Track
Motor Mounting
Flange (Front View)
Motor Shaft
CW Rotation
(Positive Direction)
LINEAR MOTOR
ROTARY MOTOR
Positive MOVE (Clockwise)
Positive MOVE
(Clockwise)
0°
90°
180°
270°
360°
450°
540°
630°
720°
810°
0°
90°
180°
270°
360°
450°
540°
630°
720°
810°
0°
90°
180°
270°
360°
450°
540°
630°
720°
810°
1V
pk-pk
Figure 2-14:
Analog Encoder Phasing Reference Diagram
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Chapter 2
27
