Apparatus and method including deviation sensing and recovery features for making three-dimensional articles
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United States of America Patent
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Jan 12, 1999
Issued Date -
N/A
app pub date -
Feb 9, 1996
filing date -
Oct 19, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A three-dimensional article making apparatus includes a build material dispenser for dispensing build material based upon the article defining data, and a deviation sensor for sensing a deviation during construction of the article. The apparatus may operate the build material dispensing means to adjust or recover for a sensed deviation during construction of the article. A portion of dispensed build material may be removed responsive to a sensed deviation. In addition, the deviation sensor may be operated a plurality of times during construction of the article, and a portion of dispensed build material may be removed down to a previous desired article portion. The deviation sensor may be provided by article formation deviation sensor, a build material dispenser sensor, an article defining data deviation sensor, and/or a build rate deviation sensor. The article deviation sensor may cooperate with a heated electrically conductive body used to periodically dimensionally normalize the article. Method aspects of the invention are also disclosed.
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