The dos and don'ts of roundness measurement

Article Abstract:

Roundness and roundness measurement require extensive training, especially with the emergence of sophisticated, computerized roundness measurement instruments. Industry experts offer 23 pointers that will aid in improving circular-measurement skills. These cover setup mistakes, such as centering, missing datum, improper clamping, instrument misalignment and lack of correlation with a fixture. Misunderstanding mistakes include form specification, underestimating environmental influence and correlation between devices. Tips to avoid miscellaneous mistakes involving cleanliness, probe maintenance and eccentricity calculations are also offered.

Methods, Physical measurements, Physical measurement, Circle, Circles

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Eyes have it when it comes to gloss

Article Abstract:

Inconsistencies in glossmeter readings is one of the difficulties that experts and industries have so far failed to address. Although international standards have been implemented to ensure the consistency of gloss measurements, manufacturers still report varying measurements on identical products. The problem can be attributed to the fact that the US lacks traceable calibration sources for measuring textured materials and inaccurate data obtained from gloss evaluations using the naked eye.

Standards, Usage, Metals, Measuring instruments, Mensuration, Metal surfaces

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Inadequate standards don't hinder surface technology

Article Abstract:

Manufacturers of surface-measurement instruments are striving to meet the market needs of their customers, despite a lack of standards for 3-D characterization or the data formats produced by surface-measurement instruments. Thus, users do not know what these 3-D devices are capable of providing, what their information actually means and what surface- measurement parameters are suitable for certain applications.

Instrument industry, Management

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