| Eccentricity
Factor
Eccentricity is the crystal elongation or aspect ration. Symmetric objects
such as circles, squares and hexagons have an eccentricity of 1.0. Asymmetric
objects such as rectangles, have values greater than 1.0. Eccentricity factor
is used in describing MBS diamond and is defined as follows:
Eccentricity
is defined as the maximum ratio of the magnitude of the two principle moments
of the object shape.
Eccentricity factor = 1000 x (median eccentricity – 1) Eccentricity factor
= 1000 x (1.070 – 1) = 70 The image analysis system, used to measure eccentricity,
employs high resolution digital photography coupled with powerful computational
algorithms to quickly measure the shape characteristics of large crystal populations.
Shape, as measured by eccentricity factor, has a significant effect on saw blade
performance. Products with lower median eccentricity factors exhibit better wear
performance and lower power requirements in a wide range of MBS diamond applications.
| Effect
of eccentricity on saw blade performance 350 mm Ø blades, 450 cm |
2 |
/min, |
bright
red granite, Gregori Saw, TI 74 for all samples studied.
Distribution of shapes within a product is of great importance in product design.
The standard deviation is controlled during the manufacture of top grade MBS diamond,
and is measured and quantified by the image analyses technique.
Representative eccentricity distributions
of premium grade MBS diamond.
Higher grade products typically exhibit lower median eccentricity values.
Benefits
of quantitative shape measurements
- Improved sorting and classifying of crystals
- Improved ability to test and match specific
shapes to specific applications
|
These methods are fundamental stepping stones to improved quality, consistency
and performance of saw diamond products. To meet market needs, diamond abrasives
constantly require tighter tolerances and higher quality standards. The ability
to more closely match diamond to specific applications is becoming more and more
critical. Diamond Innovations has committed significant resources to develop advanced
crystal testing methods.
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© Copyright 2004 Diamond Innovations, USA |
