Patent ID: 6681145
Filing Date: 2004-01-20
Classification: B25J,G05B

Abstract:
A method for improving the accuracy of machines in a factory, comprising the steps of:(a) driving a machine tool having an end effector to a first commanded location based upon machine control commands operating through a machine controller, the commands being generated from a digital definition of the part or assembly on which the machine tool works; (b) precisely measuring the true position of the end effector when the machine tool stops at the first commanded location; (c) comparing the measured position with the first commanded location in a computer; (d) sending delta correction commands from the computer to the machine tool to adjust the position of the end effector if the difference between the measured position and commanded position exceeds a predetermined threshold; and (e) scaling the commanded position as derived from the digital definition with a configuration scale calculated in the computer based upon real-time measurement of a change in location of critical features on the part, assembly, or associated tooling and adjusting the delta correction commands in response to the same configuration scale.