Hewlett-packard Development Company, L.p.

Pascal Ruiz

Alejandro Campillo

Angel Martinez Barambio

Marcos Casaldaliga

Alex Andrea

Jean Frederic Plante

Joan Campderros

David Toussaint

Marc Serra

Jordi Sender

Marc Bautista

Toni Gracia

Angel Alvarez

Pasqual Batalla

The invention relates to a calibration method for a printer having a mechanism for advancing a medium in a direction of media advance comprising the following steps: (a) providing a printhead, the printhead having a swath height in the direction of media advance; (b) providing an estimate of either the swath height or the characteristic of the mechanism; (c) printing a base pattern on a medium using the printhead; (d) printing an overlay pattern on the medium using the printhead to form an interference pattern; (e) advance the medium of a predetermined distance using the mechanism at a time between the printing of the base pattern and the printing of the overlay pattern; (f) analyze an optical evaluation of the interference pattern; (g) evaluate as either: (i) the swath height if the characteristic of the mechanism is known or estimated; or (ii) the characteristic of the mechanism if the swath height is known or estimated.

Calibration method for a printer

The invention relates to a calibration method for a printer having a mechanism for advancing a medium in a direction of media advance comprising the following steps:

A method of determining an angle between a first direction of movement of a print head and a second direction of movement of a print media, comprises: printing an array of markings on said print media, said array of markings extending along said first direction and along said second direction; traversing a sensor device along said first direction, and detecting a signal corresponding to said plurality of markings; identifying a plurality of peaks in said sensor signal as a plurality of data co-ordinates; and obtaining an angle data describing an angle between said plurality of data co-ordinates and a reference data.

Media skew compensation in printer device

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Barcelona, Spain

Pascal Ruiz