Changing the size of bowls

I came across a question on the scroll saw forum recently about changing the size of a bowl. If you're considering do this, please remember that when you enlarge or reduce a bowl pattern, you are also changing the width of the rings. Since the width of the rings is one of the factors that determines the cutting angle, you must re-calculate the cutting angle so your rings will stack properly.

If you have the bowl book, you'll find an easy to use formula in the Appendix. If you don't have the book, try the AngleCalc utility on scrollmania.com, adding a degree or two for safety.

And if you really get stuck, drop me a line and I'll help you figure it out. No point in wasting good wood if you don't have to!