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Search Publications by: Shawn P. Moylan (Fed)

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Displaying 126 - 150 of 153

A Review of Test Artifacts for Additive Manufacturing

May 24, 2012
Author(s)
Shawn P. Moylan, April L. Cooke, Kevin K. Jurrens, John A. Slotwinski, M A. Donmez
A standardized test part can be used to quantitatively evaluate the performance of a machine or process. This document reviews existing test artifacts used to characterize additive processes that are reported in the literature. Several aspects of the test

Evaluation of Proposed Test Artifacts for Five-Axis Machine Tools

November 18, 2011
Author(s)
Shawn P. Moylan, David Blumenfeld, Michael L. McGlauflin, Ronnie R. Fesperman Jr., M A. Donmez
Machining of a test artifact is an attractive method of evaluating the performance of a machine tool because the tests are often quick and do not require special instrumentation. An appropriate artifact should be complex enough to assess a machine's

Process Intermittent Measurement for Powder-Bed Based Additive Manufacturing

August 31, 2011
Author(s)
April L. Cooke, Shawn P. Moylan
Process intermittent measurements of parts fabricated by additive manufacturing (AM) can enable both in-process improvement and characterization of parts' internal geometries. The planar, layer-upon-layer nature of most AM processes allows simple two

Ultra-Precision Linear Motion Metrology

June 23, 2010
Author(s)
Ronnie R. Fesperman Jr., M A. Donmez, Shawn P. Moylan
Many new emerging applications of nanotechnologies require the use of compact precision linear translation stages that have positioning resolution on the order of a nanometer and an exceptionally long range of motion on the order of tens of millimeters

Complete Inspection: In-situ system to inspect 100% of micro-parts

February 1, 2010
Author(s)
Shawn P. Moylan
On-machine measurement can provide significant advantages in part metrology at the micro/meso-scale. The strengths of measurement by fringe projection techniques directly address the difficulties presented by on-machine measurement. An experimental setup

Uncertainty Analysis of a Simple Fringe Projection System

July 1, 2009
Author(s)
Shawn P. Moylan, Gregory W. Vogl
Fringe projection is an optical method of measuring the surface profile of a part. Most basic fringe projection processes require an initial calibration step to determine components of coordinate transformation matrices before the surface point coordinates

Error Motions of a Non-orthogonal Rotary Axis

October 19, 2008
Author(s)
Michael L. McGlauflin, Shawn P. Moylan
Error-motions of rotating axes are one of many sources of imprecision in machining. Accurate determination of axis of rotation error motions of the rotary axes has a direct influence on the accuracy of the finished part. International and U.S. national