Methods for monitoring electro-magnetic radiation power in solid freeform fabrication systems
First Claim
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1. A dispensing system for forming three-dimensional objects, layer by layer, on a fabrication platform, the system comprising:
- a printing assembly movable between a printing area and a service area, wherein the printing assembly includes an irradiation unit comprising a housing and a radiation source and a printing head;
a first light sensor positioned at the service area to measure output radiation power of the irradiation unit, wherein a vertical distance between the light sensor and the irradiation unit at a time of measuring the output radiation power is the same as a vertical distance between the irradiation unit and a top deposited layer of the three-dimensional object being formed at a time of printing;
a second light sensor positioned with the housing and configured to directly measure output radiation power of the radiation source; and
a controller to receive measurements from the first light sensor and from the second light sensor, to compare between the measurements from the first light sensors and the second light sensor and to automatically adjust electrical power supplied to the irradiation unit based on the measurements.
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Abstract
System for controlling fabrication of three-dimensional objects, layer by layer are disclosed. The system includes a printing assembly having an irradiation unit and a printing head, the printing assembly is movable between a printing area and a service area. The system further includes a light sensor positioned at the service area to measure the output radiation power of the irradiation unit and a controller to receive information from the sensor and to automatically adjust the electrical power supplied to the irradiation unit.
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7 Claims
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1. A dispensing system for forming three-dimensional objects, layer by layer, on a fabrication platform, the system comprising:
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a printing assembly movable between a printing area and a service area, wherein the printing assembly includes an irradiation unit comprising a housing and a radiation source and a printing head; a first light sensor positioned at the service area to measure output radiation power of the irradiation unit, wherein a vertical distance between the light sensor and the irradiation unit at a time of measuring the output radiation power is the same as a vertical distance between the irradiation unit and a top deposited layer of the three-dimensional object being formed at a time of printing; a second light sensor positioned with the housing and configured to directly measure output radiation power of the radiation source; and a controller to receive measurements from the first light sensor and from the second light sensor, to compare between the measurements from the first light sensors and the second light sensor and to automatically adjust electrical power supplied to the irradiation unit based on the measurements. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification