METHOD AND DEVICE FOR DETECTING AN IMPENDING INCOMPLETE CUT OR AN INCOMPLETE CUT WHICH HAS ALREADY OCCURRED WHEN THERMALLY SEPARATING A WORKPIECE

摘要

The aim of the invention is to allow a potential incomplete cut to be detected during the cutting process when thermally cutting a workpiece (208). According to the invention, this is achieved by a method for detecting an impending incomplete cut or an incomplete cut which has already occurred, wherein energy is input into a cutting region, and the method has the following steps: a) applying a first alternating signal to the workpiece (208), b) detecting a second alternating signal caused by the first alternating signal in a measuring electrode (207) arranged at a distance from the workpiece (208), c) ascertaining the phase offset between the first and the second alternating signal, thereby outputting a phase offset signal, and d) comparing the phase offset signal with a specified upper threshold and a specified lower threshold for the phase offset signal.