Kerf Spacing Ellipse and Spiral

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Kerf Spacing Calculator for Ellipse and Spiral

Wood Thickness
? Thickness of remaining wood after kerf is cut. The optimum Minimum Thickness of wood to obtain the curve cannot be calculated. It depends on the type of wood, grain, dimensions etc. Test with scrap first to perfect. Min Thickness
Kerf Width
Kerf Cuts

? Over-all dimensions of the curve Curve Scale
? Distance between each kerf cut gets smaller by this value, which tightens the curve as it proceeds. Curve Progression
? Cut kerfs with a router and tapered bit to remove gaps. Rout test piece with tapered bit at required depth to measure Kerf Width entry. Router Tapered	Dimensions
Colour

Full Scale Diagram Scale

Diagram Scale

The gap between kerf cuts gets smaller as the curve progresses, so the curve gets sharper as it goes.
Play around with Kerf Cuts, Curve Scale and Curve Progression sliders to get desired curve shape.

Running Centres:
Mark-out

Adjust scale of diagrams to measure 100% scale on screen with a ruler.

Scale

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All Inch inputs and dimensions are actual physical finished sizes

Fraction Precision

Lumber

Prec…

0

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How should we spell it?	Metre Meter
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