Patent ID: 8075080
Filing Date: 2011-12-13
Classification: B41J

Abstract:
1. A printing apparatus comprising: a chuck configured to support a substrate thereon; a rail spaced apart from the chuck; a printhead carriage frame coupled to the rail and containing a printhead carriage housing at least one printhead therein; a first camera assembly coupled to the chuck and configured to capture image data of the printhead and provide the image data to a computer; a second camera assembly moveably coupled to the rail, wherein the second camera assembly is configured to capture an image of the substrate; a fiducial mark coupled to the chuck that is viewable by both the first and second camera assemblies; and a computer receiving the image data from the first camera assembly and configured to determine a deviation between a desired position of the printhead and an actual position of the printhead, wherein the computer is configured to control at least one of firing of the printhead and relative movement between the chuck and the printhead carriage frame based upon the deviation, and wherein a camera of the first camera assembly is configured to be movable in a direction generally perpendicular to an upper surface of the chuck, wherein the computer is configured to: