About Darrell_H

Oct. 25, 2009
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  • Optimizing Drawings for FlowJet - I made it at TechShop!

    I ran across this description of circle arcs vs ellipses in cutting holes for sinks in counter tops. In this case, the difference between a true ellipse and a 4-part circle arc path will result in a slightly different cutout that can result in a significant/noticeable sink fit error. I found the referenced graphic useful for understanding how these circle-arcs can be pieced together to approximate non-circular objects.See the discussion in tip #5 at http://www.lambentdesert.com/tips.htmlThe graphical example discussed above is at:https://upload.wikimedia.org/wikipedia/commons/b/b...The red path at the bottom is an actual ellipse, while the blue path is composed of the 4 circle arcs merged together. The black and white portion shows the 4 overlapping circles, and how the 4 circular segments (bottom of the top circle, outer sides of the two middle circles, and top of lowest circle) outline the dark area that only approximates the ellipse.

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