Patent ID: 7815279
Filing Date: 2010-10-19
Classification: B41J

Abstract:
1. A method for adjusting a first array and a second array relative to each other in a printing device, the printing device having a carrying structure for mounting the first array and that second array, the first array having nozzles arranged in a first row substantially parallel to a first direction for forming first marks on a recording substrate, the second array having nozzles arranged in a second row substantially parallel to the first direction for forming second marks on the recording substrate, wherein in an attainable relative position, the first array and the second array at least partially flank each other, thereby defining a degree of longitudinal overlap along the first direction, the method comprising the steps of: forming a test pattern having first and second test marks; detecting the locations of the first and second test marks; determining a plurality of deviation factors for a plurality of attainable relative positions based on the detected locations, wherein each one of said plurality of deviation factors is an attribute of a distinct attainable relative position and is indicative of an amount by which distances between neighbouring first and second marks deviate from a nominal distance; and selecting an attainable relative position among the plurality of attainable relative positions that has the smallest deviation factor among the plurality of deviation factors, wherein a maximum function constrains the deviation factor attributed to a distinct attainable relative position to take the value of the largest difference, in absolute value, among an ensemble of differences computed between the nominal distance and the distances between neighbouring first and second marks.