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Displaying records 11 to 20 of 68 records.
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11. A Users' Guide to NIST SRM 2084: CMM Probe Performance Standards
Gregory W Caskey, Steven David Phillips, Bruce R. Borchardt, David E Ward, Daniel S Sawyer
Standard Reference Materials (SRMs) as defined by the National Institute of Standards and Technology (NIST) are well-characterized materials, produced in quantity and certified for one or more physical or chemical properties. They are used to assure ...
12. ASME B89.4.19 Performance Evaluation Tests and Geometric Misalignments in Laser Trackers
Balasubramanian Muralikrishnan, Daniel S Sawyer, Christopher J Blackburn, Steven David Phillips, Bruce R. Borchardt, William Tyler Estler
Small and unintended offsets, tilts, and eccentricity of the mechanical and optical components in laser trackers introduce systematic errors in the measured spherical coordinates (angles and range readings), and possibly in the calculated lengths of ...
13. Application of the ASME/ANSI B89.1.12M Standard to an Articulating Arm Coordinate Measuring Machine
NIST Interagency/Internal Report (NISTIR)
Gregory W Caskey, Steven David Phillips, Bruce R. Borchardt, H Eaton, J Smith
Abstract not available.
14. Assessing Ranging Errors as a Function of Azimuth in Laser Trackers and Tracers
Balasubramanian Muralikrishnan, Vincent D Lee, Christopher J Blackburn, Daniel S Sawyer, Steven David Phillips, Wei Ren, Ben Hughes
Tilt and radial error motion of a laser tracker head as it spins about the two axes results in small but measurable ranging and angle errors. The laser tracer, on the other hand, measures range with respect to the center of a high quality stationary ...
15. Assessment of Conformity, Decision Rules and Risk Analysis
Steven David Phillips, Michael Krystek
Measurement uncertainty has important economic consequences for calibration and inspection activities. In calibration reports, the magnitude of the uncertainty is often taken as an indication of the quality of the laboratory. In industrial measurem ...
16. Calculation of Measurement Uncertainty Using Prior Information
Steven David Phillips, William Tyler Estler
We describe the use of Bayesian inference
to include prior information about the
value of the measurand in the calculation
of measurement uncertainty. Typical
examples show this can, in effect, reduce
the expanded uncertainty by up to 85 %.
17. Challenges to the use of the GUM
Steven David Phillips
Presentation at the BIPM on (1) Issues with the uncertainty evaluation associated with the calibration of indicating instruments; and (2) the growing problem with ,outlier rejectionŠ in measurements with measurands defined by ,extreme valuesŠ
18. Choosing test positions for laser tracker evaluation and future Standards development
Balasubramanian Muralikrishnan, Daniel S Sawyer, Christopher J Blackburn, Steven David Phillips, Craig M Shakarji, Ed Morse, Robert Bridges
A working group within the ISO TC 213 committee is developing a draft document  for evaluating the performance of laser trackers. The ASME B89.4.19 Standard  and the draft VDI/VDE 2617 part 10  describe some useful tests that are incorporat ...
19. Corrections for Wavelength Variations in Precision Interferometric Displacement Measurements
Jack A Stone Jr., Steven David Phillips, G Mandolfo
Precision interferometric displacement measurements require deadpath corrections to account for variations in wavelength during the course of the measurement. This paper discusses common errors in applying deadpath corrections and describes the corre ...
20. Design and Testing of a One Dimensional Measuring Machine for Determining the Length of Ball Bars
J C Ziegert, D Rea, Steven David Phillips, Bruce R. Borchardt
A new machine for the rapid calibration of ball bars has been built. By means of comparisons to CMM measurements, it has been shown to work as an accurate special purpose machine for the calibration of ball bar lengths.