Sine Wave Encoder (Primary) [-Mx2/-Mx3 Option]; Figure 2-22: Sine Wave Encoder Phasing Reference Diagram; Table 2-18: Sine Wave Encoder Specifications - Aerotech Automation1 iXC4e Hardware Manual

2.3.1. Primary Encoder Inputs

2.3.1.3. Sine Wave Encoder (Primary) [-MX2/-MX3 Option]

The Sine Wave Encoder option provides higher positioning resolution by subdividing the
fundamental output period of the encoder into smaller increments. The amount of subdivision is
specified by the PrimaryEncoderMultiplicationFactor [A3200: EncoderMultiplicationFactor]
parameter. Use Encoder Tuning [A3200: Feedback Tuning] to adjust the value of the gain, offset, and
phase balance controller parameters to get the best performance. For more information, refer to the
Help file.
High resolution or high-speed encoders can require increased bandwidth for correct operation. Use
the High Speed Mode of the PrimaryEncoderMultiplierSetup [A3200: EncoderMultiplierSetup]
parameter to enable the high bandwidth mode. Because this mode increases sensitivity to system
noise, use it only if necessary.
The drive can generate emulated encoder signals. These signals can be output on the Auxiliary
Encoder (AUX) connector, SYNC port connector, or used internally by the PSO. Refer to the
EncoderDivider and PrimaryEmulatedQuadratureDivider [A3200: EmulatedQuadratureDivider]
parameters and the encoder output functions [A3200: ENCODER OUT command] in the Help file for
more information.
For the highest performance, use twisted pair double-shielded cable with the inner shield connected
to signal common and the outer shield connected to frame ground. Do not join the inner and outer
shields in the cable.
Table 2-18: Sine Wave Encoder Specifications
Specification
Input Frequency (max)
Input Amplitude
Interpolation Factor (max)
-MX2/-MX3 Primary Encoder Channel
Interpolation Latency
Input Common Mode
(1) Measured as SIN(+) - SIN(-) or COS(+) - COS(-)
Figure 2-22: Sine Wave Encoder Phasing Reference Diagram
48
(1)
-MX2
-MX3
iXC4e/XC4e Hardware Manual
Value
Primary
450 kHz, 2 MHz
0.6 to 1.75 Vpk-pk
65,536
65,536
800 nsec (analog input to quadrature output)
1.5 to 3.5 VDC
Auxiliary
450 kHz
N/A
16,384
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