Laser marking and engraving for the automotive industry poses many challenges to the plastic mold manufacturer. In the past, laser-marking systems have not been intuitive in confirming part identification or part positioning. Inaccurate placement of the mark due to a part misalignment or the engraving of incorrect marking information due to a lack of part identification results in waste parts and reduces product profitability in a highly competitive market. This paper describes the procedure for laser marking using a through-the-lens vision process, Integrated Mark Positioning (IMP), and data compiled comparing marking with and without IMP. Results show that a mark placement accuracy of 0.03 mm with a part placement variation of 4 mm or larger can be achieved. System configuration, operation and benefits of integrated vision are also covered.
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