Patent ID: 7568778
Filing Date: 2009-08-04
Classification: B41J

Abstract:
1. An image forming apparatus comprising: a feed mechanism including a motor that is to be driven with supply of a power thereto, and a feeder that is to be moved by said motor for feeding a medium in a feed direction; a recording head operable to eject an ink toward the medium so as to form an image on the medium; a feed controller operable, upon reception of a command requesting the medium to be fed to a desired recording position, to control said motor so as to move said feeder to a target operating position that causes the medium to be positioned in said desired recording position; and an ink ejection controller operable, upon positioning of the medium in said desired recording position, to cause at least one ink ejection portion of said recording head to eject the ink therethrough toward the medium, wherein said feed controller includes: a target-operating-position changer operable, upon reception of said command, to change said target operating position as an original target operating position to a modified target operating position in which influence of a cyclic variation of an operation velocity of said feeder upon the positioning of the medium is smaller than in said original target operating position, said cyclic variation being caused by a torque fluctuation of said feed mechanism, and wherein said ink ejection controller includes: an ink-ejection portion shifter operable, when said target operating position is changed, to shift said at least one ink ejection portion in one of upstream and downstream directions in which said desired recording position is shifted as a result of change of said target operating position, for avoiding a position of said at least one ink ejection portion relative to the medium from being changed by the change of said target operating position.