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Detecting An Encoder Material Reading Error

  • US 20090152351A1
  • Filed: 08/25/2008
  • Published: 06/18/2009
  • Est. Priority Date: 12/14/2007
  • Status: Abandoned Application
First Claim
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1. A method for detecting an encoder material reading error, said method comprising:

  • slewing at least one of a sensor and an encoder material with respect to each other, wherein the encoder material has markers positioned at substantially fixed intervals;

    detecting the markers with the sensor as at least one of the sensor and the encoder material is slewed with respect to each other to obtain position vs. time data of the sensor with respect to the encoder material;

    analyzing the position vs. time data to determine whether a speed at which at least one of the sensor and the encoder material travels with respect to each other fell below a predetermined threshold; and

    determining that an encoder material reading error occurred in response to a determination that the speed fell below the predetermined threshold.

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