Patent ID: 6212751
Filing Date: 2001-04-10
Classification: G05B,Y10T

Abstract:
A method of examining a position of at least one board-support pin which is continuously movable, and positionable at an arbitrary position, on a board-support base for supporting a printed-circuit board under a back surface thereof, the method comprising the steps of:moving at least one of an image taking device and the board-support base relative to the other of the image taking device and the board-support base, in a direction parallel to the board-support base, so that the image taking device is positioned at a position opposed to a free end of the board-support pin positioned on the board-support base;taking an image of the board-support pin, with the image taking device positioned at the position opposed to the free end of the board support pin;judging, based on the taken image, whether at least one positional error of at least one actual position of the board-support pin from at least one reference position in at least one reference direction parallel to the board-support base falls within a reference range, and when it is judged that the positional error falls within the reference range, judging that the actual position of the board-support pin is appropriate, and when it is judged that the positional error does not fall within the reference range, judging that the actual position of the board-support pin is not appropriate; andproducing judgment information indicative of a result of the judgment.