Patent ID: 6492651
Filing Date: 2002-12-10
Classification: B22F,B29C,B29K,B33Y,Y02P

Abstract:
A method for forming a three-dimensional object by a closed loop selective deposition modeling technique dispensing a build material in a X/Y plane in a layer by layer manner to achieve a desired layer thickness for each layer, the method comprising:dispensing the build material according to data descriptive of a layer of the three-dimensional object to form at least a portion of the layer of the three-dimensional object; monitoring a surface of the portion of the layer of the three-dimensional object to produce at least one height data signal; processing the height data signal to produce feedback data, the feedback data comprising desired X/Y locations on the surface of the portion of the layer of the three-dimensional object that are lower than the desired layer thickness; and utilizing the feedback data to selectively dispense the build material at the desired X/Y locations on the surface of the portion of the layer to achieve the desired layer thickness.