METHOD OF POSITIONING A CUTTING POINT OF A CUTTING TOOL, AND APPARATUS EMPLOYING THE METHOD ON A NUMERICALLY CONTROLLED LATHE

摘要

The invention relates to a process and an apparatus for positioning a point belonging to the cutting zone of a tool in a digitally controlled lathe. The process consists of obtaining the image of the contact point of the tool cutting zone in a virtual relative mark with two perpendicular axes and then bringing about coincidence between the origin of the relative mark and the rotation axis of the tool holder capstan. The process then involves bringing about coincidence betwen the chosen contact point and the origin of the relative mark. The contact point is then made to coincide with the intersection point of the axes of an absolute fixed reference mark. Application to the regulation of the position of a tool in a digitally controlled lathe.