Abstract: In a method for producing and/or machining a non-conical face of a workpiece defined by a segment of a cone, in particular a sealing face of a multiple-eccentric shut-off valve, using a machine tool having at least two linear axes and at least one rotary axis controlled by a numerical controller for generating a relative movement between a tool and the workpiece, a cycle is provided on the numerical controller and retrieved by a user of the machine tool. The user parameterizes the cycle, whereafter a part program is generated by the cycle for execution by the numerical controller. The executed part program generates the relative movement along a path determined by the part program to produce and/or machine the face of the workpiece.

Abstract: A method which allows an operator to quickly form a clear picture with regard to the positioning accuracy of a machine part that is displaceable along an axis by means a drive controlled by a controller includes specifying with the controller nominal position values of the machine part in relation to a single axis, wherein the nominal position values are defined by a sine function; displacing the machine part with respect to the single axis in accordance with the nominal position values; determining with a measuring device actual position values of the machine part in relation to the single axis; and visualizing the actual position values of the machine part in relation to the single axis graphically in a circular representation.

Abstract: A method which allows an operator to quickly form a clear picture with regard to the positioning accuracy of a machine part that is displaceable along an axis by means a drive controlled by a controller includes specifying with the controller nominal position values of the machine part in relation to a single axis, wherein the nominal position values are defined by a sine function; displacing the machine part with respect to the single axis in accordance with the nominal position values; determining with a measuring device actual position values of the machine part in relation to the single axis; and visualizing the actual position values of the machine part in relation to the single axis graphically in a circular representation.