In order to find the optimal position for a marking, the circuit board must be positioned reliably. Cut-outs on the side edges and recesses , sometimes require repositioning of the stopper. "Flying Stopper", one of our hidden champions of the INSIGNUM laser marking systems 4000 and 6000, takes over this process automatically. The stopper can be individually adjusted in the Y-direction via the SIMPLEX surface and can therefore react flexibly to any product. The product changeover is accelerated and operator intervention is no longer necessary.