Print apparatus and adjustment method thereof

An adjustment method of a print apparatus that includes a recording head having a nozzle row configured to eject a liquid onto a medium and that forms a print image corresponding to an input image on the medium,

• the print apparatus being configured to perform main scanning in which a relative positional relationship between the recording head and the medium is changed along a main scanning direction and sub scanning in which a relative positional relationship between the medium and the recording head is changed along a sub scanning direction intersecting the main scanning direction, eject the liquid from the recording head during the main scanning, and complete recording of the print image by the main scanning of a plurality of passes,
• the plurality of passes including a preceding pass, and a following pass after the preceding pass,
• the adjustment method comprising:
• a first image forming step of forming a first image, which is a part of the print image and includes a first mark portion readable by a read unit that reads a state of the liquid landed on the medium, on the medium in the preceding pass;
• a second image forming step of forming a second image, which is a part of the print image and includes a second mark portion readable by the read unit, on the medium to overlap the first image formed on the medium while keeping the first mark portion readable by the read unit in the following pass;
• a reading step of reading the first mark portion and the second mark portion together by the read unit when both the first mark portion and the second mark portion are readable;
• and
• an adjustment step of adjusting a landing position of the liquid on the medium based on a relative positional relationship between the first mark portion and the second mark portion included in a reading result of the read unit.