Examines the development of a laser‐based system for detecting the presence or absence of threads on turned components used in the automotive industry. Describes how a laser inspection station would be set up to take readings from the laser detector as the component cuts a “part present” photoswitch. Explains how all the systems’ parameters are programmable by the user through a hand‐held terminal and describes two typical applications: one to detect the presence of an external thread on an engine plug and the other to check an internal thread on an aluminium insert for a fuel injection system. Outlines the properties of laser light that makes it preferable for use over camera‐based inspection systems and lists some applications suitable for laser based systems such as checking for component features such as threads, holes, grooves and tabs.
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