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Title: High Precision Dimensional Calibrations: Use Of Self-Calibration Techniques To Bring State-Of-The-Art Levels Of Measurement Uncertainty Into Everyday Industrial Practice
Author: James G. Salsbury, Christopher Lee, Bunji Aoyama, Don Reder
Source: 2004 Measurement Science Conference
Year Published: 2004
Abstract: The continued tightening of dimensional tolerances combined with the demand for accreditation of calibration services is pushing the limits of many organizations capabilities. This is particularly relevant when the cost of lowering calibration uncertainty is high. This paper explores the journey taken by a dimensional metrology manufacturer to develop cost effective, on-site, calibration procedures with measurement uncertainty that approaches, or sometimes is even lower than, the levels offered by the state-of-the-art procedures at the best national metrology institutes worldwide. The focus of this uncertainty improvement journey is the calibration of one particular type of dimensional form measuring instrument, the roundness measuring machine. For a common, industrial, off-the-shelf, measuring instrument, the roundness machine has some of the tightest specifications. On-site calibration of these instruments needs to be done with an uncertainty that is often lower than what is offered for the calibration of the appropriate reference standards at most national metrology institutes. The challenge faced by the manufacturer is to demonstrate traceability and achieve the required uncertainty given the demanding requirements. This paper will explore these challenges and present some novel solutions that allow state-of-the-art measurements to be economicallyreduced to everyday practice.

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