Abstract: An ink jet printer which is designed to control the motions of horizontal and vertical drive motors collectively and thereby allow only one motor to be driven at time for the reduction of peak power consumption includes: a vertical drive motor for feeding and discharging a print paper; a horizontal drive motor for driving a carriage to carry an ink cartridge to a print position; an ASIC circuit section corresponding to a logic circuit for controlling the operations of the horizontal and vertical drive motors; an EEPROM saving initial setting values required to control the ASIC circuit section and a program for a system; a driver circuit for controlling the operations of the drive motors; and a converger for managing tasks requested by the driver circuit in a collective manner so as to prevent simultaneous driving of the vertical and horizontal drive motors.

Abstract: A technique for setting a power saving access time of an image forming apparatus includes: checking the time that no image is formed, and producing a value corresponding to the checked time; calculating a power saving mode access time according to data corresponding to the checked time; and resetting a power saving mode access time to the calculated power saving mode access time.