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Use of a polymer film bridge to measure the contact force applied by instruments used in the measurement of surface textures.

Law, A; Leach, R K (2001) Use of a polymer film bridge to measure the contact force applied by instruments used in the measurement of surface textures. NPL Report. CBTLM 14

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Abstract

ISO 3274 (1996) advocates that the static measuring force applied by the tip of a stylus-based surface texture measuring instrument should be 0.75mN and should not vary during a measurement. This force is usually set by the manufacturer and is difficult for the user of the instrument to verify. This report details a procedure whereby the stylus tip is drawn across a thin polymer film that is rigidly supported at both ends. The deflection of the film, caused by the contact of the stylus tip with the film, is measured and the force being applied by the stylus is calculated. While results showed that this particular method would not be suitable for applications where high accuracy is required, it could be usefull as a cheep and simple conformance test device to check whether the stylus force is complient with ISO 3274 (1996).

Item Type: Report/Guide (NPL Report)
NPL Report No.: CBTLM 14
Keywords: stylus force, surface texture measurement
Subjects: Engineering Measurements
Engineering Measurements > Dimensional
Last Modified: 02 Feb 2018 13:17
URI: http://eprintspublications.npl.co.uk/id/eprint/2132

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