Patent ID: 6957496
Filing Date: 2005-10-25
Classification: B25J,G01B

Abstract:
1. A method for improving the measurement accuracy of a portable coordinate measurement machine (CMM) which measures the position of an object in a selected volume, the CMM including a manually positionable articulated arm having opposed first and second ends, said arm including a at least five rotary joints such that said articulated arm has at least five degrees of freedom, a measurement probe attached to a first end of said articulated arm and an electronic circuit which receives the position signals from transducers in said arm and which provides a digital coordinate corresponding to the position of the probe in a selected volume comprising: sensing deformation of a portion of said articulated arm when said arm is placed under a load, said deformation causing an error in the measurement made by the CMM; and correcting said error in response to said deformation.