Portland Community College
Part-Time Instructor
Microware Jan 1999 - Jun 2001
Electrical Engineer
Audio Precision Jan 1999 - Jun 2001
Electrical Engineer
3D Systems Corporation Mar 1998 - Dec 1998
Electrical Engineer
Education:
California State University, Northridge 1996
Masters, Electrical Engineering
Skills:
Fpga Electrical Engineering Engineering Program Management Teaching
Us Patents
Stereolithographic Method And Apparatus For Production Of Three Dimensional Objects With Enhanced Thermal Control Of The Build Environment
Arvind Chari - West Hills CA Joseph F. Schoelen - Hillsboro OR Raymond J. Bishop - Santa Clarita CA
Assignee:
3D Systems, Inc. - Valencia CA
International Classification:
B29C 3508 B29C 4102
US Classification:
264401
Abstract:
A rapid prototyping and manufacturing (e. g. stereolithography) method and apparatus for making three-dimensional objects with enhanced control of the temperature of the build environment. A modulated control signal is supplied to a heating element based on a difference between a desired build temperature and a detected temperature. The modulated signal result in the heater supplying, on average, more energy to the build chamber when the temperature difference is large and supplying, on average, less energy to the build chamber when the difference is small. The detection of the build chamber temperature may occur at one or more locations. If multiple locations are used, the detected temperatures may be averaged, or otherwise combined, to derive a single difference value that will be used to control the heater. Alternatively, the multiple detected temperatures may be used to produce multiple difference values that can in turn be used to control the quantity of heat applied directly to different locations in the build environment by either using multiple heaters or multiple controllable ducts.
Youtube
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02 Apr, 2011
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Category:
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