Safety method for a machine tool and optoelectronic sensor for carrying out such a method

摘要

The method involves determining from signals supplied by light-sensitive elements the relative positions between individual workpieces (2,4) or tool areas or measured values in relation to individual workpiece or tool areas. A shadow crack in the workpiece or tool can be determined by evaluating the signals supplied from the light sensitive elements. Independent claim describes optoelectronic sensor (12,14) as protector for machine tools where an evaluator and control unit is additionally designed to determine relative positions between individual workpiece or tool areas in dependence on signals supplied through light-sensitive elements.