Abstract: The invention relates to a control system of a CNC machine tool with cyclically recurring sequences. The control system has a data input and visualization unit, a machine check unit and a NC control unit with at least one stored NC program for generating movement sequences for the CNC machine. Functional data which are required for the machining of a specific work piece and which have been fed into the data input and visualization unit or selected in the unit are conveyed from the data input and visualization to the NC control unit. The machine check unit calls up function modules of the NC control program according to selected control data and by means of control codes, said function modules representing part programs, and proceeds from one function module to the next independently of its hierarchical position in the tree structure. In so doing, the machine check unit deactivates the hold commands in each function module by means of the control codes.

Abstract: A detector for determining the presence of an electrical signal in the presence of noise, the electrical signal having at least two predetermined characteristics, includes a signal transforming device for obtaining a plurality of independent estimates of each characteristic, a classification device connected to the signal transforming device for sorting the plurality of independent estimates into at least two classes, and a counting device for signaling the presence of the electrical signal, when the number of the estimates within one class exceeds a predetermined number.