FREMGANGSMAADE TIL FASTLAEGGELSE AF EN BASISLINIE I EN AUTOMATISK STYRING TIL EN VAERKTOEJSMASKINE OG POSITIONERINGSINDRETNING TIL GENNEMFOERELSE AF FREMGANGSMAADEN

摘要

A machine tool is illustrated having a workpiece support table on which a workpiece is moved by an automatically controlled workpiece gripper movable in the X and Y directions. Movement of the gripper in at least the X direction is controlled in reference to a base line which is set within the automatic control in response to abutment of the workpiece edge against a table supported stop, the stop being movable against a spring from a rest position through a first or base line set in position in response to abutment by the moving edge of the workpiece carried by the gripper. Movement of the stop through the first position automatically sets the base line within the automatic control.