Aerotech Automation1 iXL2e, Hardware Manual

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3.2.3. Sine Wave Encoder (Auxiliary) [-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 AuxiliaryEncoderMultiplicationFactor parameter. Use Encoder 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 .
You cannot use the sine wave encoder on the auxiliary connector with the -MX3 multiplier option as
an input to the PSO. The -MX3 option does not generate emulated quadrature signals from the
auxiliary connector.
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 3-7: Sine Wave Encoder Specifications
Specification
Value
Primary Auxiliary
Input Frequency (max) 200 kHz, 2 MHz 200 kHz
Input Amplitude
(1)
0.6 to 1.75 Vpk-pk
Interpolation Factor (max)
-MX2 65,536 N/A
-MX3 65,536 16,384
-MX2/-MX3 Primary Encoder Channel
Interpolation Latency
800 nsec (analog input to quadrature output)
Input Common Mode 1.5 to 3.5 VDC
(1) Measured as SIN(+) - SIN(-) or COS(+) - COS(-)
Figure 3-7: Sine Wave Encoder Phasing Reference Diagram
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