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Proceedings Paper

On-Machine Measurement Of Surface Texture Parameters
Author(s): Lionel R. Baker
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Paper Abstract

Increasing attention is being paid to the use of non-contact sensors for the measurement of surface texture quality before removal of the component from the surface finishing machine. The information obtained in this way is of direct value in optimising process technology and for tool life prediction. Since faults in the process of surface generation can initiate changes in roughness, waviness and flaws, all the surface texture features need to be quantified. Whilst measurement of the angular spread of a beam of light scattered by a surface provides information on the first two parameters, isolated defects such as digs and small scratches are not so readily measured. An alternative approach, based on the precise measurement of the contrast of an image of the surface under test when illuminated with partially coherent white light, has shown considerable promise in measuring all relevant parameters. Providing reference surfaces bearing a range of calibrated texture features are available for direct photometric comparison, the method has been shown to be capable of measuring a wide range of texture features. The paper will report on the latest position concerning standards for the measurement of flaws, such as scratches and digs, and also on the potential of this image comparator technique for measuring surface roughness, waviness and microtopography, in an on-machine situation.

Paper Details

Date Published: 21 March 1989
PDF: 6 pages
Proc. SPIE 1009, Surface Measurement and Characterization, (21 March 1989); doi: 10.1117/12.949173
Show Author Affiliations
Lionel R. Baker, Sira Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 1009:
Surface Measurement and Characterization
Jean M. Bennett, Editor(s)

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