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MULTIPLE DIMENSION POSITION SENSOR

  • US 20090224750A1
  • Filed: 06/27/2008
  • Published: 09/10/2009
  • Est. Priority Date: 06/27/2007
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a controller;

    a workpiece transport in communication with the controller having a movable portion and a transport path; and

    a multi-dimensional position measurement device including at least one field generating platen attached to the movable portion and at least one sensor group positioned along the transport path and in communication with the controller, where the field generating platen is configured for both position measurement and propelling the movable portion;

    wherein the each sensor in the at least one sensor group is configured to provide but one output signal corresponding to variances along a single axis in a sensed field generated by the at least one field generating platen and the controller is configured calculate a multi-dimensional position of the movable portion adjacent a respective one of the at least one sensor group based on the but one output signal of at least one of the sensors in the at least one sensor group, where the multi-dimensional position includes at least a planar position and a gap between the workpiece transport and the at least one sensor group.

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