METHOD TO EXECUTE A PRINT INTERRUPTION IN PRINTING OPERATION OF AN INK PRINTING SYSTEM WITH AT LEAST ONE PRINTING APPARATUS

摘要

In a method to execute a printing interruption in a printing operation, with triggering of the print interruption a feed speed of the printing substrate is reduced from a print speed to a predetermined speed in a slowing ramp, and after the print interruption the printing substrate is accelerated again to the print speed in an acceleration ramp. With aid of the sensor, print clock pulses are generated which are supplied to a print controller depending on the feed speed of the printing substrate. Given occurrence of a print clock pulse during the ramps, with the print controller a vibration cycle is initiated at nozzles of the print head that are not ejecting ink droplets at a time when the vibration cycle is initiated.

主权项

1. 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.