Image forming apparatus and control method thereof

摘要

An image-forming apparatus (100) including a post-processing device (200) which performs a post-processing operation for a discharged printing medium with an image formed thereon, includes: an image forming unit (110) which forms an image on the printing medium; a medium feeding unit (120) which feeds the printing medium to the image forming unit; a discharging unit (240) which is provided in the post-processing device and discharges the printing medium with the image formed thereon; a medium alignment unit (220) which aligns the printing medium for post-processing for the discharged printing medium; a user interface unit (150) which receives an instruction from a user; and a control unit which controls a width of the medium alignment unit to correspond to a width of the discharged printing medium based on a setting value for the medium feeding unit, which is input through the user interface unit, if the size of the printing medium loaded on the medium feeding unit is not detected. With this configuration, it is possible to control a width of a medium alignment unit for post-processing using a setting value set for a multipurpose cassette having no size sensor, so that printing media having different sizes can be properly aligned.