Processing machine and unloading method of workpiece

An unloading method of a workpiece for unloading the workpiece, the workpiece being held under suction on a holding surface of a holding unit communicating with a suction source, from the holding surface, with use of a processing machine,

• the processing machine including a holding unit having a holding surface, a processing unit that processes the workpiece held under suction on the holding surface, and a controller configured to control the holding unit and the processing unit,
• the holding unit including a suction valve that establishes or interrupts communication between the holding surface and the suction source, a fluid ejection valve that establishes or interrupts communication between the holding surface and a fluid supply source, a plurality of suction openings that are arranged in a ring pattern outside of the holding surface and draw fluid ejected from the holding surface, and a suction-openings suction valve that establishes or interrupts communication between the suction openings and the suction source,
• the unloading method comprising:
• a separation step of separating the workpiece from the holding surface by closing the suction valve and opening the fluid ejection valve such that the fluid is supplied to the holding surface;
• and
• an unloading step of unloading, from the holding surface, the workpiece separated from the holding surface, wherein
• the separation step includes a drawing step of opening the suction-openings suction valve and drawing the fluid outside of the holding surface.