Verfahren zur Bestimmung von Druckkopfabweichungen in einem Abtastdrucker

Details

Veröffentlichungs-Nr.

EP4744899

Anmeldetag

14. November 2024

Veröffentlichung

20. Mai 2026

Rechtsraum

EP

IPC

B41J2/21, B41J25/00

Abstract

An improved method for determining the positional deviations of nozzles in a printhead array using only a single test pattern is provided by means of the steps of: - printing a test pattern, wherein preferably neighboring nozzles jet non-simultaneously; - sensing the test pattern (30) to determine an array of detected droplet positions (37, 38); - determining an array of nominal nozzle positions (41-45) based on the detected droplet positions (37, 38) and their respective jetting times; - determining a common rotation deviation parameter (Rz1) corresponding to a rotation of the printhead array (1) with respect to a scanning direction (Y) based on the detected droplet positions (37, 38); - transforming the array of nominal nozzle positions (41-45) to compensate for the common rotation deviation parameter (Rz1); - determining positional deviations (dX', dY') of nozzles (21-26) in the printhead array (1) by comparing the transformed array of nominal nozzle positions (41-45) to a reference.

Anmelder

Firma

Canon Production Printing Holding B.V.

Land

🇳🇱 Niederlande