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Installation and Configuration
Ensemble CP
2.3.1.4. Analog Encoder Interface
If the -MXU option has been purchased, the standard encoder channel will accept a differential analog
encoder input signal. The interpolation factor is determined by the EncoderMultiplicationFactor parameter
and is software selectable (refer to the Ensemble Help file).
Table 2-16:
Analog Encoder Specifications
Specification
Value
Input Frequency (max)
200 kHz
Input Amplitude
0.6 to 2.25 Vpk-Vpk
Interpolation Factor (software
selectable)
4,096
Refer to
Figure 2-22
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 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
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 2-22:
Analog Encoder Phasing Reference Diagram
N O T E :
The input amplitude is measured peak to peak for any encoder signal (sin, sin-n, cos, cos-n)
relative to signal common. These signals have a typical offset voltage of 2V to 2.5V.
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Chapter 2
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