METHOD AND APPARATUS FOR CHECKING THE WORKING POSITION OF A TOOL

摘要

A method and an apparatus for checking the working position of a tool (13) carried by a tool-holder (15) coupled to a rotating spindle (1) of a machine tool, wherein the distance between an annular plane surface (23) of a flange (19) of the tool-holder and a corresponding annular plane surface (29) of the spindle is checked. Variations of such distance with respect to an amount predetermined in a calibration phase, are checked by monitoring - during the rotation of the spindle - variations of a feature of a light beam (35) that passes through a groove (31) defined by the annular plane surfaces facing each other. A laser collimated beam wider than the groove can be used, and the monitored feature can be its luminous intensity.