Abstract: A fault diagnostic apparatus for the recognition of defective components of a technical system with fault-relevant process variables contains a diagnostic module which has a checklist and a table of predetermined conditions (in memory). The conditions are determined by a component fault simulation in a generated model of the operation of the system. The checklist provides a primary process variable and secondary process variables affected thereby, and the table of conditions gives for each combination of fault-relevant process variables, the corresponding components suspected of being faulty. During the operation of the system, the diagnostic module detects the condition values of the primary process variables and, upon the occurrence of a fault condition therein, activates a diagnostic process in which it compares the actual condition combination with the one stored in the table of conditions.

Abstract: The invention relates to a method for the continuous path control of a machine tool, where either the tool or the workpiece is moved along a curve corresponding to the contour for the purpose of producing a given workpiece contour. The shape of the contour is approximated by a plurality of individual points and interpolation is carried out between the points. After each interpolation section, the set point is scanned, a set point/actual value comparison is carried out and a corresponding correction value is put in for the actuating element. To reduce the required effort at good accuracy, set point scanning is carried out after a given path section instead of a given time interval.