Jetting apparatus and origin correction method therefor

A jetting apparatus having a two-axis angle control configured to control a tilt angle and a pivot angle other than a three-axis control consisting of an X-axis and a Y-axis orthogonalized with each other and a Z-axis of a spray axis line, and spraying a high pressure jet on a work from a nozzle, the apparatus comprising:

• an origin correction controller configured to match a set processing top point with a machine top point of the jet sprayed;
• and
• an optical size-measurement device configured to measure a pass position of the jet,
• wherein the origin correction controller is configured to perform:
• a jet radial-runout measurement process of measuring a position of the jet passing through an XY-plane including the machine top point in a state of spraying the jet in a direction of the Z axis;
• a jet radial-runout correction process of calculating an error at the processing top point, based on a deviation between position dada obtained by the jet radial-runout measurement process and the processing top point, and correcting radial runout of the jet;
• a jet top-point variation measurement process of changing the tilt angle and measuring two positions, where the jet passes through the X-Y plane, in a state of the jet being tilted and sprayed with respect to the direction of the Z axis by the angle control;
• and
• a jet top-point variation correction process of calculating an error at the processing top point of the jet from position data of the two positions and correcting a deviation of the processing top point.