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Model generation system having closed-loop extrusion nozzle positioning

  • US 5,303,141 A
  • Filed: 03/22/1993
  • Issued: 04/12/1994
  • Est. Priority Date: 01/03/1991
  • Status: Expired due to Term
First Claim
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1. A system for fabricating a three-dimensional object in accordance with a specification of the object in three dimensions, comprising:

  • means for extruding a self-supporting material;

    means for controllably positioning the extruding means in accordance with the specification of the object in three dimensions; and

    means, having an output coupled to the positioning means, for generating a feedback signal that is indicative of at least one characteristic of a previously extruded portion of the self-supporting material, whereinsaid positioning means is responsive to the feedback signal or determining at least a deviation of a location of the previously extruded portion of the material from an expected location that is specified by the specification of the object in three dimensions and for modifying, if required, further positioning of the extruding means to compensate for the deviation.

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