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DRAW CONTROL FOR EXTRUSION-BASED ADDITIVE MANUFACTURING SYSTEMS

  • US 20140048970A1
  • Filed: 08/16/2012
  • Published: 02/20/2014
  • Est. Priority Date: 08/16/2012
  • Status: Active Grant
First Claim
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1. A method for improving part quality for a printed three-dimensional part, the method comprising:

  • providing a print head retained by an extrusion-based additive manufacturing system, the print head comprising a nozzle; and

    moving the nozzle along a substantially linear segment of a tool path at a tip height above a previous layer of the three-dimensional part while extruding a flowable material;

    producing an extruded road from the extruded flowable material having a road height above the previous layer, and wherein the tip height ranges from about 150% to about 250% of the road height due at least in part to draw on the extruded road, wherein the printed three-dimensional part is substantially free of surface cresting.

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