Abstract: A method for operating a machine control system and a corresponding machine control system uses a portable hand-held terminal for functionally influencing at least one machine controller. The terminal includes at least one emergency stop actuation element for terminating potentially dangerous machine operations. The controller and/or the terminal is adapted for indicating a representation of the control system on the terminal display. The controller and/or the hand-held terminal is adapted for indicating the operational range(s) of the at least one emergency stop actuation element by the terminal display. The controller and/or the hand-held terminal are further adapted for simultaneously representing the operational range(s) of the at least one emergency stop actuation element by selective, fail-safe controlling of at least one lighting device at the hand-held terminal and/or at least one discrete lighting device in or at the at least one emergency stop actuation element at the hand-held terminal.

Abstract: A device for determining an angle between two workpiece surfaces, comprising a transmitter for producing a light beam, a continuously rotating directional rotor for emitting the produced light beam in a rotating emission direction perpendicular to an axis of rotation of the directional rotor, a receiver for receiving a reflected light beam when the emitted light beam is reflected antiparallel to the emission direction by one of the two workpiece surfaces, an emission angle sensor unit for determining emission angles of the emitted light beam at which the receiver receives the reflected light beam, a calibrating unit for determining at least calibration parameters, a memory unit for storing the calibration parameters and an error model, and an evaluation unit configured to determine the angle as a function of the determined emission angles of the light beam emitted by the directional rotor, the stored calibration parameters and the stored error model.

Abstract: The invention relates to a method for ascertaining a rough trajectory from a specified contour for controlling a machine tool which has at least two mutually redundant drive devices for carrying out superimposed movements, wherein the contour is determined by a contour function (Pj, pj) which is defined in portions by contour nodal points P0?Pn+1 and respective contour portion functions p0?pn, wherein a respective contour portion function pj connects two adjacent contour nodal points Pj, Pj+1, wherein the rough trajectory is determined by a rough trajectory function (Qj, qj) which is defined in portions by rough trajectory nodal points Q0?Qn+1 and respective rough trajectory portion functions q0?qn, wherein a respective rough trajectory portion function q connects two adjacent rough trajectory nodal points Qj, Qj+1, wherein, for each contour nodal point Pj, a respective assigned rough trajectory nodal point Qj is ascertained in such a manner that a difference in the gradients of the two adjacent rough traject