Abstract: In a method for referencing a workpiece (2) arranged in a machine tool, an image of the workpiece (2) is first of all created using a camera device (5) of the machine tool and is then displayed on a display device (6). An X-Y display coordinate (9) is selected by a user using the displayed image. A Z reference coordinate is then determined in an automated manner. An X-Y-Z starting coordinate (7) can be calculated on the basis of the Z reference coordinate determined in an automated manner and the X-Y display coordinate (9) input by the user. A measuring probe (8) of the machine tool is then moved in an automated manner to the X-Y-Z starting coordinate (7) and the X-Y-Z reference coordinate of the workpiece (2) is determined on the basis of the position of the measuring probe (8), as predefined by the X-Y-Z starting coordinate (7), by means of a suitable determination method using the measuring probe (8).

Abstract: A single-edged milling tool has a shaft section and a machining section. A face cutting edge is formed on a distal end of the machining section. The face cutting edge extends radially from an outside end at an outer peripheral edge to an inside end close to the axis of rotation. The face cutting edge has an outer peripheral planar portion at a constant planar distance to a reference plane extending perpendicular to the axis of rotation. An oblique portion connects the planar portion to the inside end. The oblique portion of the face cutting edge is closer to the reference plane than the planar portion. The distance of the face cutting edge from the reference plane in the oblique portion diminishes continuously starting out from the planar portion to the inside end of the face cutting edge.

Abstract: In a method for referencing a workpiece (2) arranged in a machine tool, an image of the workpiece (2) is first of all created using a camera device (5) of the machine tool and is then displayed on a display device (6). An X-Y display coordinate (9) is selected by a user using the displayed image. A Z reference coordinate is then determined in an automated manner. An X-Y-Z starting coordinate (7) can be calculated on the basis of the Z reference coordinate determined in an automated manner and the X-Y display coordinate (9) input by the user. A measuring probe (8) of the machine tool is then moved in an automated manner to the X-Y-Z starting coordinate (7) and the X-Y-Z reference coordinate of the workpiece (2) is determined on the basis of the position of the measuring probe (8), as predefined by the X-Y-Z starting coordinate (7), by means of a suitable determination method using the measuring probe (8).

Abstract: An automatic machine tool, particularly for producing a dental prosthesis of exact three-dimensional shape, includes a machining unit (200), a workpiece feed unit (300), a tool feed unit (400) and an operating and control unit. The machining unit (200) includes a machining tool (430) that is displaceable in three spatial directions and has a cardanic workpiece holder receptacle (210) that can be pivoted about two axes, wherein the workpiece holder receptacle (210) is arranged vertically and the machining of the workpiece is carried out in vertical arrangement so as to allow the dropping of chips.