Abstract: A digitizing probe and method is disclosed for accurately locating the edges and determining the orientation of a generally planar, metal workpiece relative to the orthogonal axes of a computer numerical control ("CNC") cutting machine. The CNC cutting machine includes a microcomputer controller for moving a transverse gantry in the longitudinal and lateral directions which define the orthogonal axes of the cutting machine. The digitizing probe and the cutter of the cutting machine are mounted on separate vertically movable support arms secured to support brackets provided on the transverse gantry. Thus, the digitizing probe and the cutter may be independently positioned at predetermined heights above the top surface of the workpiece. The digitizing probe includes a plurality of analog inductive proximity sensors arranged in a fixed, predetermined array.

Abstract: An apparatus for mounting a cutting torch to a shape cutting machine is disclosed, and which incorporates a control system for signaling the machine in the event the torch contacts an obstruction during either vertical or lateral movement of the torch by the machine. The control system includes a pair of plates mounted to the torch so that the plates are displaced relative to each other when the torch contacts an obstruction, and a number of gas release valves are mounted to the plates and which are connected to a gas line so that a signal is generated upon a relative displacement of the plates. The signal is directed to the control logic of the shape cutting machine so that it may take corrective action.