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| Fox Bender Patterns - how much undersize? http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=26493 |
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| Author: | Robbie_McD [ Fri Mar 12, 2010 12:37 am ] |
| Post subject: | Fox Bender Patterns - how much undersize? |
I have taken possession of a shiny new Fox Bender (thanks John!) I have my own shape I would like to build a bending pattern for. How much undersize should I go to account for springback? Thanks! Rob |
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| Author: | Rod True [ Fri Mar 12, 2010 12:48 am ] |
| Post subject: | Re: Fox Bender Patterns - how much undersize? |
I go 3/8-1/2" on the ends only, smooth it out (tapered arch?) to the upper and lower bout peak. I don't do anything at the waist. As far as undersize for the blanket slats etc, I go about 1/8" offset from the body mold for the bending form. |
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| Author: | woody b [ Fri Mar 12, 2010 7:30 am ] |
| Post subject: | Re: Fox Bender Patterns - how much undersize? |
If you're building with an outside mold springback really isn't much of an issue. At least not for me. I make my forms the exact shape of the mold. |
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| Author: | ChuckB [ Fri Mar 12, 2010 12:56 pm ] |
| Post subject: | Re: Fox Bender Patterns - how much undersize? |
I make my forms smaller than the mold by the thickness of the rim (average) + thickness of the inner slat. If you put the heating blanket on the bottom, then I would also subtract the thickness of the blanket. Chuck |
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