How to improve the visual quality of the starting point and the ending point

摘要

The machining start point 3A and the machining end point 3D are set in addition to the time point 3B and the end point 3C to eliminate the deep scratches at the time point 3B and the end point 3C.;A pointing device in which a point 3B and an end point 3C of a workpiece 2 are pressed against a workpiece 2 by pressing and moving the air pen 1 while vibrated, And the lowering of the air pen 1 and the vibration of the air pen 1 are started at the machining start point 3A and the air pen 1 is moved while continuing the processing , The air pen 1 is turned back at the point of time 3B and the processing is continued to set the processing end point 3D between the point of time 3B and the end point 3C of the workpiece 2. At the end point 3C, Only the vibration of the air pen 1 is stopped, and the air pen 1 is raised at the processing end point 3D.