Cutting machine with a process regulation of the remaining material thickness during preweakening of an airbag cover; method thereof

Residual wall thickness (A2) of a material (70) is controlled on-line, during airbag weakening, when lines of weakness, or desired rupture- and penetration lines are formed. Residual wall thickness (A2) of the material (70) is controlled on-line, during airbag weakening, when lines of weakness, or desired rupture- and penetration lines are formed. The cutting head (10) carries a blade (35) and is moved by a guidance unit. A sensor is connected to them; this measures the clearance between the cutting tip and a cutting counter-plate (81). Sensor measurements are unaffected by the material cut, including its molded skin. The clearance (A) between sensor (85) and counter plate (81), or between blade tip and the plate, is taken as a control magnitude. The actuator is robotic and operates along further axes.