Patent ID: 6633663
Filing Date: 2003-10-14
Classification: G06T,H05K

Abstract:
A method for determining component dimensional information for placing a component on a circuit board comprising:grasping a component at substantially the centroid of said component with a positioning tool; positioning said component over the aperture of a camera; detecting first and second edges of said component in the field of view of said camera; detecting third and fourth edges of said component; determining from said detected edges at least one dimension of said component; storing said dimension in a component database for use in placement of said component on a circuit board, determining a component pickup error by comparing a position of said centroid with the location of a position of a grasping tool which supports said component, and storing said component pickup error in said component database; wherein said step for locating said second and third edges comprising: indexing the position of said component a plurality of positions until said second and third edges are positioned in said camera aperture; and determining a first dimension of said component from said plurality of positions and the location of one of said edges in a field of view of said camera.