Patent ID: 7645012

Claim:
A recording apparatus comprising: a carriage mounting a recording head thereon and moving along a surface of a recording sheet at least in a width direction; a plate configured to load recording sheets; a base section configured to support the plate; a reference side guide configured to set a reference position for the recording sheet loaded on the plate in the width direction; a movable side guide arranged on the plate movably in the width direction and configured to set positions of the recording sheets loaded on the plate in the width direction in company with the reference side guide; a first detection unit configured to detect roughly a position of the movable side guide from a plurality of predetermined positions in the width direction; a second detection unit including an optical sensor provided on the carriage, configured to detect precisely an end position of a recording sheet in the width direction, fed one by one from the recording sheets loaded on the plate, while the carriage moves in the width direction; and a control unit configured to control the apparatus, wherein the control unit determines a limited detection area of the second detection unit in accordance with the detected predetermined position of the movable side guide detected by the first detection unit, and the end position of the recording sheet is detected when outputs of the optical sensor change while the carriage moves in the limited detection area; and wherein the control unit further determines a position error of the movable side guide by steps of: a first step to feed the recording sheet; a second step to detect the recording sheet fed in the first step by the optical sensor at a position that is closer to the reference position than the detected predetermined position in the width direction; and a third step to determine the position error in a case where no recording sheet has been detected in the second step.