Digital printing device for the dynamic printing of a statically printed substrate web and reel-fed printing press

A digital printing device for dynamic printing of a substrate web statically printed in a reel-fed printing press, wherein the digital printing device performs the dynamic printing in line with the reel-fed printing press, comprising:

• a position sensor, which together with a digital printing head, is relocateable on a cross member transversely to a transport direction of the substrate web and measures the substrate web for regulating a print position for the dynamic printing;
• an interface, wherein a signal from a signal source of the reel-fed printing press is receivable by the digital printing device via the interface, wherein the signal comprises a speed signal of the reel-fed printing press and a cylinder trigger signal of the reel-fed printing press;
• a position sensor control that generates a synchronization signal based on the cylinder trigger signal and a measurement value of the position sensor, and provides the synchronization signal to a digital printing head control;
• and
• a speed signal transformer that generates a feed signal based on the speed signal and a predetermined dynamic print resolution input by a user via an operator interface, and provides the feed signal to the digital printing head control;
• wherein the digital printing head control activates the digital printing head in accordance with the synchronization signal and the feed signal;
• and wherein a maximum printing speed of the dynamic printing and of the static printing are matched and limited to one another by a data comparison between the speed signal of the reel-fed printing press and the feed signal for the digital printing device with the predetermined dynamic print resolution.