Adaptive Control for Laser Cutting Using Striation Frequency Analysis

Abstract An adaptive control system for laser cutting has been developed with the aim to improve the productivity and the cut quality. The control strategy is based on a set of parameters, which have an effect on the quality of the cut. This paper focuses on one of these parameters, namely the striations on the cut surface. A spectrum analysis technique has been developed which allows striation frequency analysis to be used on-line. It utilises a process monitoring system which detects light emissions directly at the cut front. Cutting experiments with a 1.5kW CO 2 laser using this technique have shown that it is possible to improve the cut quality.