| 摘要 |
The invention provides a method for checking positioning accuracy of a CNC machine with a machine tool head and a machine table, using an x, y, z coordinate system, wherein the z coordinate is the coordinate perpendicular to the machine table surface, the method comprising the steps: a) arranging a plurality of vessels on the machine table, wherein the vessels are in fluid connection with each other to form a system of communicating vessels, wherein the system of communicating vessels is filled with a liquid, b) mounting a distance sensor to the machine tool head, c) positioning the machine tool head to a position perpendicular above the surface of the liquid in one of the vessels, d) approaching the surface of the liquid with the distance sensor and determining the z coordinate for which the distance sensor touches the surface of the liquid, or. for a predetermined position of the machine tool head in z direction above the surface of the liquid, determining the distance between the distance sensor and the surface of the liquid, wherein steps c) and d) are repeated for each vessel to determine a respective z coordinate of the surface of the liquid. |
