Synthesis of the measurement system on the machine tool

The design methodology of a 2 1/2-dimensional measurement and inspection sy stem realized on a machine tool using a touch trigger probe and measuring G codes is studied in this paper. The reliability of measuring results, the agility of measurement, and user friendliness are synthesized in the design process. Algorithms for calibration and compensation of measuring errors a re proposed to ensure the measuring accuracy by using a laser interferomete r and ring gauges. Classification of probing feedrates and a collision-chec k algorithm can reduce measuring time and implement stylus-fracture-free me asurements. To improve the previous on-machine measurement processes, all f unctions required for measurement and inspection processes are constructed as measuring G codes with similar forms of machining G codes. The interacti ve measuring program generating tool, which can automatically generate meas uring G codes, is developed and potted in a ROM of a CNC, and can be called to perform an operation by the CNC without interfacing with personal compu ters. The validity and effectiveness of the developed system are verified o n a horizontal machining centre with a Fanuc 15MA.