Ensemble LAB Hardware Manual
Installation and Configuration
2.3.1.2. Analog Encoder Interface
If the -MXU or -MXR option has been purchased, the primary encoder channel will accept an analog encoder
input signal. The multiplication (interpolation) factor is determined by the EncoderMultiplicationFactor axis
parameter.
Table 2-7:
Analog Encoder Specifications
Specification
MXU
MXR
Input Frequency (max)
200 kHz
200 kHz
Input Amplitude
0.6 to 2.25 Vpk-Vpk
0.6 to 2.25 Vpk-Vpk
Interpolation Factor (software
selectable)
8,192
65,536
MXR Interpolation Latency
N/A
~ 3.25 µsec (analog input to quadrature output)
The encoder interface pin assignment is indicated in
The gain, offset, and phase balance of the analog Sine and Cosine encoder input signals are controlled by
the EncoderCosineGain, EncoderCosineOffset, EncoderPhase, EncoderSineGain, EncoderSineOffset axis
parameters. Encoder signals should be adjusted for optimum performance using the Feedback Tuning tab of
the Ensemble Digital Scope utility. It will automatically adjust the encoder parameters for optimum
performance. See the Ensemble 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 2-4:
Analog Encoder Phasing Reference Diagram
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Chapter 2
29
