Hewlett-packard Development Company, L.p.

Norman Guillo

Antonio Gracia Verdugo

Aleix Fort Filgueira

Pau Costal Fornells

A method is disclosed. The method may involve obtaining information indicative of a number of printing passes of a print head to print a swath on a printable medium. The method may comprise determining that the print head is to perform a particular printing pass which is one of: a printing pass during which an amount of print agent to be deposited from nozzles of the print head differs, by an amount that exceeds a defined threshold, from an amount of print agent to be deposited from the nozzles during a printing pass immediately preceding said particular printing pass; and a printing pass to print a swath which is the first of a plurality of adjacent swaths in which each swath has an area coverage exceeding a defined threshold. The method may comprise preparing, based on said obtained information, a schedule for a nozzle spitting procedure to commence before the print head performs the particular printing pass.

Print head nozzle spitting

Provided in one example is a printing system. The system includes a printing zone including a platen (). The system includes a drive to move a medium () through the printing zone. The system includes a suction force generator () to generate a suction force to hold down the medium onto the platen while the drive moves the medium through the printing zone. The system includes a sensor () to monitor the movement of the medium through the printing zone in a medium advance direction. The system includes a controller to determine that the suction force generated by the suction source generator is insufficient based on an output of the sensor.

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Sant Cugat del Valles, Spain

Norman Guillo