| 摘要 |
An image-forming device has a recording unit, a conveying unit, a control unit, and a detecting unit. The recording unit has a plurality of recording elements provided at a predetermined pitch in a subscanning direction. The recording unit is movable in a main scanning direction orthogonal to the subscanning direction. The plurality of recording elements is capable of forming a dot on a recording medium, respectively. The predetermined pitch corresponds to a predetermined resolution. The conveying unit conveys the recording medium in the subscanning direction by a predetermined distance every time the recoding unit moves in the subscanning direction. The control unit sequentially selects a first distance n times (wherein n is a natural number) as the predetermined distance, and selects a second distance as the predetermined distance after the n times of selection of the first distance. The second distance is longer than the first distance The detecting unit detects an edge of the recording medium which extends in the subscanning direction only after the recording medium is conveyed by the second distance.
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