Abstract: The present invention provides a calibration system, comprising a movable conveyor body configured to hold a plurality of sheets, and a drive mechanism which supports and/or drives the movement of the conveyor body to convey the sheets along a transport path. The calibration system is adapted or configured to detect a position and/or a speed of the conveyor body as it conveys the sheets, the calibration system comprising one or more markers which are provided on or in the conveyor body and a sensor arrangement for detecting each marker at two or more discrete positions spaced apart from one another. The markers are distributed along and fixed with respect to the conveyor body, wherein each marker is uniquely identifiable or distinguishable by the sensor arrangement. The present invention also provides an associated method of calibrating a sheet conveyor mechanism.

Abstract: A method for adjusting a first and a second array relative to each other in a printing device has a carrying structure for mounting the first and second arrays. The first array has nozzles arranged in a first row substantially parallel to a first direction for forming first marks on a recording substrate. The second array has nozzles arranged in a second row substantially parallel to the first direction for forming second marks on the recording substrate. In an attainable relative position, the first and second arrays at least partially flank each other. The method includes forming a test pattern and detecting the locations of first and second test marks; determining a plurality of deviation factors for a plurality of attainable relative positions; and selecting an attainable relative position among the plurality of attainable relative positions that satisfies a selection criterion applied to the plurality of deviation factors.

Abstract: A method for adjusting a first and a second array relative to each other in a printing device has a carrying structure for mounting the first and second arrays. The first array has nozzles arranged in a first row substantially parallel to a first direction for forming first marks on a recording substrate. The second array has nozzles arranged in a second row substantially parallel to the first direction for forming second marks on the recording substrate. In an attainable relative position, the first and second arrays at least partially flank each other. The method includes forming a test pattern and detecting the locations of first and second test marks; determining a plurality of deviation factors for a plurality of attainable relative positions; and selecting an attainable relative position among the plurality of attainable relative positions that satisfies a selection criterion applied to the plurality of deviation factors.