Printing apparatus and method of controlling printing apparatus

A method of controlling a printing apparatus, the method comprising:

• executing, by a control unit of a printing apparatus,
• first-direction movement control processing for moving a head in a first direction parallel to a support surface configured to support at least a printing region of a medium, the head being configured to eject a liquid onto the medium supported by the support surface;
• and
• second-direction movement control processing for moving an interference detection unit in a second direction being parallel to the support surface and intersecting with the first direction, the interference detection unit being configured to detect interference with respect to the head, wherein
• the control unit of the printing apparatus executes
• first movement control processing for moving the interference detection unit to one side in the second direction in the second-direction movement control processing,
• stop control processing for stopping the interference detection unit at a stop position in the second-direction movement control processing when the interference detection unit detects interference as a result of executing the first movement control processing,
• second movement control processing for moving the interference detection unit to a predetermined position to the other side opposite to the one side in the second direction in the second-direction movement control processing after the stop control processing is executed,
• third movement control processing for moving the interference detection unit to the one side again in the second-direction movement control processing after the second movement control processing is executed, and
• adjustment control processing for performing adjustment so that an interval between the head and the support surface is increased in a third direction intersecting with the support surface, based on a detection result by the interference detection unit between the stop control processing and the third movement control processing in the second-direction movement control processing.