Patent ID: 8401691
Filing Date: 2013-03-19
Classification: G05B

Abstract:
1. A dynamic metrology method, comprising: periodically determining an actual position of one or more of a machine and a tool with respect to a workpiece using a first device that directly determines position; tracking a tracked position of the one or more of the machine and the tool with respect to the workpiece using a second device that directly measures a kinematic property other than position, the second device being different from the first device; and altering a controlled position of the one or more of the machine and the tool with respect to the workpiece when either the actual position or the tracked position of the one or more of the machine and the tool with respect to the workpiece diverges from a desired position of one or more of the machine and the tool with respect to the workpiece; wherein periods of determining using the first device are dispersed within periods of tracking using the second device.