Method of controlling inkjet printing process

A method of controlling an inkjet printing process by using an inkjet print system that includes a first section including a first support chuck and a second support chuck, which support different substrates, and a first suction unit, a second section provided parallel to the first section in a first direction and including a second suction unit and a wiper, a first gantry which moves a position of a first head along the first section and the second section in the first direction, a second gantry which moves a position of a second head along the first section and the second section in the first direction independently of the first gantry, and a controller which drives the first support chuck, the second support chuck, the first suction unit, the second suction unit, the wiper, the first head, the second head, the first gantry, and the second gantry, the method comprising:

• a printing operation of moving the first support chuck or the second support chuck in a second direction perpendicular to the first direction and performing an inkjet printing process of discharging an ink onto the substrate;
• and
• a first suction operation of suctioning remaining ink from a nozzle formed on the first head or the second head using the first suction unit,
• wherein the controller controls the printing operation for a first substrate, the first suction operation for the second head or the printing operation for a second substrate, and the first suction operation for the first head to be sequentially performed.