Sheet finishing apparatus and control method

A sheet finishing apparatus, comprising:

• an inlet roller to receive a sheet;
• a sheet introduction unit configured to align the sheet received by the inlet roller;
• a finishing unit configured to perform finishing on the sheet conveyed by the sheet introduction unit;
• a sheet ejection unit configured to guide the sheet performed to the finishing by the finishing unit to an ejection port and to eject the sheet from the ejection port;
• a storage tray that moves up and down and receives the sheet ejected from the ejection port;
• a drive unit configured to drive respective devices existing between the inlet roller and the storage tray and including a plurality of motors having sound pressure levels less than a previously set reference level and a plurality of motors having sound pressure levels higher than the previously set reference level;
• and
• a control unit configured to control the drive unit in a trial operation of the sheet finishing apparatus, to first drive any one of the motors having the sound pressure levels less than the previously set reference level, and then to drive other motors including the plurality of motors having the sound pressure levels higher than the previously set reference level.