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Author: johannes soons
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41. Error Analysis of a Hexapod Machine Tool
Johannes A Soons
This paper describes the measurement and analysis of the quasi-static errors of a prototype hexapod milling machine at the National Institute of Standards and Technology (NIST). Emphasis is placed on a) the identification and definition of the parame ...
42. Magnetic field dependence of the critical current anisotropy in normal
metal-YBa,Cu307-delta thin-film bilayers
Ronald H. Ono, Loren Frederick Goodrich, James A Beall, Johannes A Soons, Carl D Reintsema
We have measured the transport critical current density (Jc) in epitaxial quality films of
YBa2Cuj07-delta some of which were covered by thin (10 nm) Ag films. The films, both with
and without Ag, had Jc values greater than 10^6 A/cm2 in liquid nit ...
43. Performance Evaluation of a Parallel and a Hybrid Machine Tool
Journal of Research (NIST JRES)
Johannes A Soons, S M Athavale, R Furness
vances in both the technology and cost of controllers have enabled the commercial introduction of machine tools with a parallel configuration of the positioning axes. In theory, this radical change in design enables improvements in key machine chara ...