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Sensors 2010, 10(11), 10069-10080; doi:10.3390/s101110069

A Method for Evaluating Dynamical Friction in Linear Ball Bearings

1
Department of Electronic Engineering, Faculty of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan
2
Advanced Research Center for Photonics, King Mongkut’s Institute of Technology Ladkrabang Chalongkrung Road, Ladkrabang, Bangkok 10520, Thailand
3
Department of Computer Engineering, King Mongkut’s Institute of Technology Ladkrabang, Chalongkrung Road, Ladkrabang, Bangkok 10520, Thailand
*
Author to whom correspondence should be addressed.
Received: 16 September 2010 / Revised: 10 October 2010 / Accepted: 15 October 2010 / Published: 9 November 2010
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Abstract

A method is proposed for evaluating the dynamical friction of linear bearings, whose motion is not perfectly linear due to some play in its internal mechanism. In this method, the moving part of a linear bearing is made to move freely, and the force acting on the moving part is measured as the inertial force given by the product of its mass and the acceleration of its centre of gravity. To evaluate the acceleration of its centre of gravity, the acceleration of two different points on it is measured using a dual-axis optical interferometer. View Full-Text
Keywords: linear ball bearings; dynamic friction coefficient; inertial force; optical measurement linear ball bearings; dynamic friction coefficient; inertial force; optical measurement
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Fujii, Y.; Maru, K.; Jin, T.; Yupapin, P.P.; Mitatha, S. A Method for Evaluating Dynamical Friction in Linear Ball Bearings. Sensors 2010, 10, 10069-10080.

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