TOOL PATH FOR COLOR THREE-DIMENSIONAL PRINTING
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United States of America Patent
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Jan 29, 2016
filing date -
Feb 19, 2014
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Abstract
A tool path for an extruder depositing build material to create a two-dimensional cross-section of a three-dimensional model of an object includes building all regions of the object's exterior surfaces having a first material characteristic (e.g., a first color), and then transitioning to another build material having a second material characteristic (e.g., a second color different than the first color) to build all regions of the object's exterior surfaces having the second material characteristic. The extruder may traverse between different exterior regions having the same material characteristic by using an optimized path directly connecting different exterior regions along interior portions of the object. In this manner, infill can be created while saving time and material. In an aspect, only when there is no path through the interior portions that directly connects different exterior regions having the same material characteristic will the extrusion of build material be paused.
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