BEI Precision Systems & Space has developed an encoder technology, nanoSeries, that can calibrate itself in-situ and correct most of the common causes of error in typical encoders. The new nanoSeries ARA design has detailed health and status readouts that can definitively indicate when a re-calibration is in order. The re-calibration process can be done on-orbit if desired. The units can accommodate either full revolutions or limited angle sweeps, and the principles are also applicable to linear encoders.
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