Patent ID: 7665818
Filing Date: 2010-02-23
Classification: B41J

Abstract:
1. An image-forming device comprising: a recording unit having a plurality of recording elements provided at a predetermined pitch in a subscanning direction, the recording unit being movable in a main scanning direction orthogonal to the subscanning direction, the plurality of recording elements being configured to form a dot on a recording medium, respectively, the predetermined pitch corresponding to a predetermined resolution; a conveying unit that conveys the recording medium in the subscanning direction alternately with a movement of the recording unit in the main scanning direction; and a control unit that controls an operation of the conveying unit, the operation comprising a plurality of sequences, the plurality of sequences being identical to one another, each of the plurality of sequences comprising n number (wherein n is a natural number) of small-feed mode conveying distances and a single large-feed mode conveying distance, the control unit selecting a first distance in the small-feed mode, the control unit selecting a second distance in the large-feed mode, the second distance being longer than the first distance, the control unit comprising a calibrating unit that performs a plurality of calculations for calibrating, sequence by sequence, only the second distance to generate a plurality of corrected distances, wherein the conveying unit conveys the recording medium by the first distance in the small-feed mode, and the conveying unit conveys the recording medium by a corresponding one of the plurality of corrected distances in the large-feed mode to form an image having higher resolution on the recording medium than the predetermined resolution.