Supply unit, printing device, and method for controlling printing device

A control method for a printing device comprising:

• a printing head configured to perform printing process of a viscous fluid to a printing target using a screen mask;
• a squeegee configured to push the viscous fluid on the screen mask;
• a collection section having a collection member configured to contact the screen mask to collect and move the viscous fluid remaining on the screen mask from the squeegee and a collecting moving section configured to move the collection member in a predetermined printing direction;
• a supply unit having a supply section having a mounting section capable of mounting and dismounting a cartridge accommodating the viscous fluid;
• a driving section configured to move the supply section in a supply operation direction;
• a detection member;
• a supply section detecting section configured to detect whether the supply section is positioned in a passage space where the collection section and the supply section do not contact each other by a position of the detection member;
• and
• a supply moving section configured to move the supply unit between a standby area in which the supply unit stands by and a supply area in which the viscous fluid is supplied;
• and the control method including the steps of:
• controlling the driving section so that the supply section detecting section is in a state to detect the detection member in an interference area in which the collection section and the supply section in the supply area physically interfere with each other;
• moving the supply section in the supply operation direction within the passage space;
• and
• controlling the supply moving section so that the supply unit moves within the supply area.