Method to execute a print interruption in printing operation of an ink printing system with at least one printing apparatus

A method to execute a print interruption in a printing operation of an ink printing system with at least one printing apparatus, a printing substrate being printed to with a printing unit with at least one print head, and wherein the respective print image is generated by nozzles of the print head from image points arranged like a raster, comprising the steps of:

• with triggering of the print interruption reducing a feed speed of the printing substrate from a print speed in the printing operation to a predetermined speed in a slowing ramp, and after the print interruption accelerating again to said print speed in an acceleration ramp;
• and
• with aid of a sensor, generating print clock pulses supplied to a print controller depending on the feed speed of the printing substrate, and wherein, given occurrence of a print clock pulse during the ramps, with the print controller adjustably initiating a vibration cycle of vibration oscillations at nozzles of the print head that are not ejecting ink droplets at a time when the vibration cycle is initiated.