For critical applications, where it is required to identify the unwilling presence of two metal sheets in the process and to avoid their clamping. This built-in device allows a reliable double workpiece identification.
The below end cap shows an adjustment screw: by loosening the screw, the inlet pressure is adjusted, i.e. reduced to the minimum required to guarantee the clamping of a single workpiece, not of two metal sheets.
The toggle linkage is therefore prevented from engaging (no toggle lock) and consequently the sensor will not detect the closed position and will signal the anomaly.
Once the clamp is properly adjusted from the below end cap screw, to be able to clamp a single workpiece, it will be able to detect the false condition in case a second workpiece is inadvertently set on the tooling.