Abstract: In a method for operating a numerical control device for controlling a production machine for producing a workpiece, program instructions generated by CAM software are encrypted with a first encryption key to generate first encrypted program instructions and the first encrypted program instructions are decrypted with a first decryption key to generate first decrypted program instructions. To prevent unauthorized access to the program instructions, the first decrypted program instructions are re-encrypted using a second encryption key to generate second encrypted program instructions, which are stored in a memory of the numerical control device.

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: In a method for operating a numerical control device for controlling a production machine for producing a workpiece, program instructions generated by CAM software are encrypted with a first encryption key to generate first encrypted program instructions and the first encrypted program instructions are decrypted with a first decryption key to generate first decrypted program instructions. To prevent unauthorized access to the program instructions, the first decrypted program instructions are re-encrypted using a second encryption key to generate second encrypted program instructions, which are stored in a memory of the numerical control device.

Abstract: A method for operating a digital control device, and a digital control device, for controlling a manufacturing machine for manufacturing a workpiece, are disclosed. In the method, workpiece data are provided on the digital control device, and CAM software is provided on the digital control device. Program instructions for manufacturing the workpiece are generated by the manufacturing machine by the CAM software in accordance with the workpiece data. The program instructions are executed by the digital control device for controlling the manufacturing machine for manufacturing the workpiece. In order to protect the control program for the digital control device against unauthorized access, the generated program instructions are saved in encrypted form in a non-volatile memory of the digital control device and are only decrypted again immediately before the execution in a volatile memory of the NC core of the digital control device.

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.