Printer device and control method of printer device

A printer device comprising:

• a transport mechanism configured to transport, from a roll sheet including a continuous sheet being a wound form in a roll, the continuous sheet including a mount and a plurality of printing media attached to the mount and spaced apart from each other by a gap;
• a first detection unit including a first light-emitting unit configured to emit light to the continuous sheet and a first light-receiving unit configured to receive light transmitted through the continuous sheet;
• and
• a control unit configured to adjust the first detection unit, wherein the control unit configured to perform the following:
• start transporting the continuous sheet in a transport direction,
• transport the continuous sheet in a direction opposite to the transport direction by a reverse-feed distance that is greater than the gap when a printing medium of the continuous sheet reaches a detection position of the first detection unit after the gap of the continuous sheet passes by the detection position of the first detection unit, and
• start adjusting the first detection unit through a portion of the printing media reaching the detection position of the first detection unit after transporting the continuous sheet in the direction opposite to the transport direction.