Patent ID: 6384911
Filing Date: 2002-05-07
Classification: G01N,G01R,H05K

Abstract:
A method for detecting the accuracy of drilled holes in a PCB, comprising the steps of:a. setting an initial scanning position, a safety distance and a fixed distance; b. acquiring a largest distance value between a scanned interval boundary and holes situated on the scanned interval boundary; c. adding the safety distance to the largest distance value obtained from step b to obtain a width of an overlapped interval; d. adding the initial scanning position of a previous scanned interval and the fixed distance together, and then subtracting the width of the overlapped interval to obtain an initial scanning position of a next interval; and e. determining whether the present scanned interval is a last interval, if the present scanned interval is the last interval then the scanning process is stopped, and if the present scanned interval is not the last interval then steps b through e are repeated.