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Performance assessment of an ultraprecision machine tool positioning system with a friction drive  

Song Chang-Kyu (Intelligent Machine Systems Research Center, Korea Institute of Machinery and Materials)
Shin Young-Jae (Nano-Mechanical Systems Research Center, Korea institute of Machinery and Materials)
Lee Hu-sang (Intelligent Machine Systems Research Center, Korea Institute of Machinery and Materials)
Publication Information
International Journal of Precision Engineering and Manufacturing / v.6, no.3, 2005 , pp. 8-12 More about this Journal
Abstract
The positioning system for an ultra precision machine tool must be accurate to the order of a nanometer. Various feed drive devices have been proposed to achieve this resolution; currently, most attention is directed towards hydrostatic lead screws and friction drives. It has been reported that a positioning resolution accurate to an angstrom can be achieved using a twist-roller friction drive. Therefore, we manufactured an ultra precision positioning system driven by a twist-roller friction drive and assessed its performance when defining problems and finding solutions. Our study showed that the twist-roller friction drive is mechanically suitable for ultra precision positioning, but some considerations are required to obtain a higher resolution.
Keywords
Twist-roller friction drive; Ultraprecision machine tool; Coupling; Feeding system; Positioning resolution;
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