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Foam Thicknesssaw blade kerfinside curve radiusoutside curve radiusinside circumfrenceoutside circumfrencecircumfrence differenceFraction of circle?Starting piece lengthamount to be removednumber of kerfskerf spacing in inches
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20.2254648288.88301.714285712.834285710.2575.433.21154.71
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All measurments in inches (if you want to go metric that's fine just change your saw blade kerf to 3.175mm and use mm for all measurments)
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First enter your foam thickness in A2
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Then your sawblade kerf in B2 (if you don't know just leave that alone)
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In C2 enter the radius of the curve you're going around.
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in H2 enter the decimal value for the fraction of a circle you're using (90degrees or 1/4 circle is .25)
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The grey fields are your results
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I2 is how long a piece of foam you need to accomplish this curve, this can be in the middle of a bigger piece if you have progressive curves going on
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J2 is how much less foam you need on the inside of the curve vs the outside.
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K2 is the number of kerfs you need
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L2 measure that many inches from the end of the piece, mark/cut a kerf, and do so at that distance until you have the number of kerfs from K2
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