Abstract: A method for controlling a distance between a non-contact measurement probe head of a CMM and a work piece during a measurement. The method comprises providing steering commands to steer the work piece and/or the probe head through a measuring path comprising measuring positions, performing at a measuring position a measuring step comprising providing distance adjustment steering commands to set the distance between the probe head and the work piece, projecting a primary measuring beam pattern onto the work piece, acquiring a secondary measuring beam pattern originating from an interaction of the primary measuring beam with the work piece, deriving surface information based on the secondary measuring beam pattern, deriving information regarding the distance between the probe head and the work piece, deriving a distance deviation based on a distance target the derived distance information, providing the distance deviation for a distance adjustment performed at a subsequent measuring position.

Abstract: The CNC machining device 1 includes a tool magazine 20, a spindle 26, an automatic tool replacing device, a CNC controller 32, a sensor head 10 configured to generate measurement data corresponding to a distance from a surface of the object, and a personal computer 40. The sensor head 10 generates measurement data (X, Z) at regular intervals. The CNC controller 32 generates position coordinate data (x, y, z, x?, y?, z?) at regular intervals. The sensor head 10 transmits the measurement data to the personal computer 40 through first radio communication RC1. The sensor head 10 transmits a synchronization signal for synchronizing the measurement data and the position coordinate data to the CNC controller 32 through second radio communication RC2.