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Method and apparatus for monitoring electro-magnetic radiation power in solid freeform fabrication systems

  • US 9,242,411 B2
  • Filed: 01/06/2009
  • Issued: 01/26/2016
  • Est. Priority Date: 01/06/2009
  • Status: Active Grant
First Claim
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1. A method for forming three-dimensional objects, layer by layer, on a fabrication platform, the method comprising:

  • printing layers of a three-dimensional object by selectively dispensing a building material, layer by layer, from a printing head and curing deposited layers using an irradiation unit;

    moving the irradiation unit to a service area;

    measuring an output radiation power of the irradiation unit by a first light sensor positioned at the service area, wherein a vertical distance between the first light sensor and the irradiation unit at a time of measuring is the same as a vertical distance, at a time of printing, between the irradiation unit and a top deposited layer of the three-dimensional object being formed; and

    automatically adjusting an electrical power supplied to the irradiation unit based on information received from the first light sensor.

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