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Search Publications by: Shawn P. Moylan (Fed)

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Displaying 51 - 75 of 76

An Additive Manufacturing Test Artifact

October 23, 2014
Author(s)
Shawn P. Moylan, John A. Slotwinski, A L. Cooke, Kevin K. Jurrens, M A. Donmez
We propose a test artifact, intended for standardization, for the purpose of evaluating the performance of additive manufacturing (AM) systems. A thorough analysis of previously proposed AM test artifacts as well as experience with machining test artifacts

Powder Bed Fusion Machine Performance Testing

April 16, 2014
Author(s)
Shawn P. Moylan, Joseph Drescher, M A. Donmez
Unlike conventional machining where there is a near 1:1 correspondence of machine performance to the geometry of the workpiece, the accuracy of the machine components is only one of the contributors to the quality of a finished AM part. Rather, there is

Study of Accuracy of Parts Produced Using Additive Manufacturing

April 16, 2014
Author(s)
Marcin Bauza, Shawn P. Moylan, Robert Panas, Stephen Burke, Harry Martz, John S. Taylor, Paul Alexander, Richard Knebel
The purpose of this presentation is to focus discussion onto the issue of accuracy and uncertainty of parts made with additive manufacturing processes.

Infrared Thermography for Laser-Based Powder Bed Fusion Additive Manufacturing Processes

July 26, 2013
Author(s)
Shawn P. Moylan, Eric P. Whitenton, Brandon M. Lane, John A. Slotwinski
Additive manufacturing (AM) has the potential to revolutionize discrete part manufacturing, but improvements in processing of metallic materials are necessary before AM will see widespread adoption. A better understanding of AM processes, resulting from

Lessons Learned in Establishing the NIST Metal Additive Manufacturing Laboratory

June 21, 2013
Author(s)
Shawn P. Moylan, John A. Slotwinski, April Cooke, Kevin K. Jurrens, M A. Donmez
This publication presents a summary of lessons learned by NIST staff during establishment of the NIST Metal Additive Manufacturing Laboratory and implementation of the metal additive manufacturing capability at NIST. These lessons learned resulted from the

A VIRTUAL MACHINE TOOL FOR THE EVALUATION OF STANDARDIZED 5-AXIS PERFORMANCE TESTS

October 26, 2012
Author(s)
Ronnie R. Fesperman Jr., Shawn P. Moylan, M A. Donmez
Standards committees are actively working to develop standard test methods for the performance evaluation of 5-axis machining centers through the direct and indirect measurement of simultaneous motions of all five axes [1-2]. However, the compound effect

Proposal for a standardized test artifact for additive manufacturing machines and processes

August 15, 2012
Author(s)
Shawn P. Moylan, John A. Slotwinski, April L. Cooke, Kevin K. Jurrens, M A. Donmez
Historically, standardized test parts are used to quantitatively evaluate the performance of a machine or process. While several different additive manufacturing (AM) test parts have been developed in the past, there are no current standard test parts. We

Dimensional Metrology for Micro/Meso-Scale Manufacturing

June 5, 2012
Author(s)
Shawn P. Moylan
The small sizes, range of shapes and sizes, and low absolute tolerances present unique challenges to geometric dimensional metrology at the micro/meso-scale. This chapter provides and overview of the most common methods used for geometric dimensional

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