Patent ID: 8333455

Claim:
An image forming apparatus, comprising: a carriage that mounts thereon an image forming unit and reciprocates in a main scanning direction; a carriage-position detecting unit that detects a position of the carriage in a moving direction; a vibration damping unit that includes a vibration damping member driven to move by a vibration-damping drive source which may be controlled by an input of a pulse, and dampens vibration triggered by a movement of the carriage, the vibration-damping drive source being a different drive source from a drive source of the carriage; a first pulse generating unit that generates the pulse to be given to the vibration-damping drive source in synchronization with the position of the carriage obtained by the carriage-position detecting unit; and a vibration-damping control unit that gives the pulse from the first pulse generating unit to the vibration-damping drive source thereby causing the vibration damping member to move, wherein: the carriage position detecting unit includes a unit that counts the position of the carriage, the first pulse generating unit includes a unit that generates a pulse enabling the vibration-damping drive source to move by one step each time a count value of the carriage-position detecting unit reaches a set update amount, and the image forming apparatus further includes a pulse/position multiple setting unit that sets the update amount of the count value used for the first pulse generating unit to generate the pulse enabling the vibration-damping drive source to move by one step as a pulse/position multiple.