Aerotech Ensemble Epaq - Analog Encoder Interface; Table 2-11: Analog Encoder Specifications

Ensemble Epaq Hardware Manual Installation and Configuration
2.3.1.2. Analog Encoder Interface
If the -MXU or -MXH option has been purchased, the primary encoder channel will accept an analog encoder
input signal. The multiplication (interpolation) factor is determined by the EncoderMultiplicationFactor
1
axis
parameter.
Table 2-11: Analog Encoder Specifications
Specification MP ML
Input Frequency (max) 200 kHz 500 kHz
Input Amplitude 0.6 to 2.25 V
pk
-V
pk
Interpolation Factor (software selectable) 4,096 4,096 (-MXU)
65,536 (-MXH)
Refer to Figure 2-17 for the typical input circuitry.
The encoder interface pin assignment is indicated in Section 2.3.1.
The gain, offset, and phase balance of the analog Sine and Cosine encoder input signals are controlled by
the EncoderCosineGain
2
, EncoderCosineOffset
3
, EncoderPhase
4
, EncoderSineGain
5
, EncoderSineOffset
6
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 2-17: Analog Encoder Phasing Reference Diagram
1
EncoderMultiplicationFactor has replaced CfgFbkEncMultFactorMxu in software version 3.00.000.
2
EncoderCosineGain has replaced CfgFbkEncCosGain in software version 3.00.000.
3
EncoderCosineOffset has replaced CfgFbkEncCosOffset in software version 3.00.000.
4
EncoderPhase has replaced CfgFbkEncPhase in software version 3.00.000.
5
EncoderSineGain has replaced CfgFbkEncSineGain in software version 3.00.000.
6
EncoderSineOffset has replaced CfgFbkEncSineOffset in software version 3.00.000.
36 Chapter 2 www.aerotech.com