Method for controlling a CNC machine tool

A method for controlling a CNC machine tool which has cyclically recurring sequences, in particular of a gearwheel grinding machine, with a data input and visualisation unit, with a machine control unit and with a NC control unit with at least one stored NC control program for generating movement commands for the CNC machine,

• wherein in the data input and visualisation unit selected control data defining machine modes are led further to the machine control unit, and
• wherein function data which is inputted into the data input and visualisation unit or is selected in this, and which is necessary for the machining of a specific subject, is led from the data input and visualisation unit to the NC control unit, characterised in that
• the machine control unit in accordance with selected control data by way of control codes calls up function modules, of the NC control program, representing part programs, and independently of their hierarchical position in the NC control program leads them from one function module to the next,
• wherein by way of the control codes hold commands (H) present in each function module are deactivated and wherein the machine control unit on changing from one function module to the next takes into account transition functions (TF) for the physical preparation and/or data preparation of the CNC machine tool.