#16
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I have not bent any maple, can't offer any suggestions.
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#17
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Some Martins Garcia #2 classical Cordoba C10 Luthier Series Tacoma Olympia OB3CE acoustic bass "I don't care what style you want to play. If you want to master good guitar tone, master preparation, attack and release first." ~ Paul Guma |
#18
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All that arie mentioned are good. |
#19
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Thanks Arie, I looked on-line and ordered the Cumpiano and Natelson book and I am looking it over now. Still thinking of boiling my side's. If I buy the Stew Mac kit, then that gives me two chances of setting up my trough and bending form and going through with the process, taking notes. Hey if I can't get it after two tries I can always re-order the kit. How hard can this really be? A lot of guitars have been made with this method.
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Some Martins Garcia #2 classical Cordoba C10 Luthier Series Tacoma Olympia OB3CE acoustic bass "I don't care what style you want to play. If you want to master good guitar tone, master preparation, attack and release first." ~ Paul Guma |
#20
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Andersonville Tennessee Clinch River Instruments, White Oak O, 13 fret Nick Lucas, 1937 spec D-18 Martin 000-28 EC Gibson Les Paul Gibson 335 Dot Bunch of Strats Fender B-Bender Tele |
#21
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There are numerous ways to bend the sides. Pick one and follow its method for successful results. If the method you choose requires boiling sides, so be it. |
#22
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There are obviously different methods, if you are using a bending iron, no you wouldn't want to boil the sides. If you are using a cold bending jig like I have however...... http://m.youtube.com/?#/watch?v=uq3Vud4x6Ng
__________________
Some Martins Garcia #2 classical Cordoba C10 Luthier Series Tacoma Olympia OB3CE acoustic bass "I don't care what style you want to play. If you want to master good guitar tone, master preparation, attack and release first." ~ Paul Guma |
#23
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I built a classical guitar using the Sloane method in 1971 using maple sides with minimal figure in the grain. I have this guitar to this day with no problems attributable to boiling the sides.
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#24
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How long did you boil the maple before you bent it?
__________________
Some Martins Garcia #2 classical Cordoba C10 Luthier Series Tacoma Olympia OB3CE acoustic bass "I don't care what style you want to play. If you want to master good guitar tone, master preparation, attack and release first." ~ Paul Guma |
#25
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We're talkin' a span 43 years here, so it is kinda hard to go back that far, but I followed the book procedure as best I could. I used a segment of rain gutter capped at both ends and straddled two burners on a cookstove. I think i left it on the bending form for a long time (maybe a week or so).
There might have been a little superficial mold on the wood when I took it off the form, but it sanded right off - who knows - maybe even contributed a little of the mysterious "Stradivari effect". |
#26
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Here's a bit of a diversion. Boat builders will be familiar with the idea of steaming boxes. Wood, considerably thicker than any used in making guitars, is placed in the box and steam introduced for however long it took. There is then a short window of time for the wood to be bent to shape. Uffa Fox, a boat designer, builder and sailor from the Isle of Wight, wrote about preferring to boil timber for bending over steaming. It's a long time ago and I can't remember the reasons for his preferance but it might have been that he favoured the lower temperature that comes with boiling. He was, as I said, using wood that was too thick to cup. It is interesting that someone has actually used boiling for sides.
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#27
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I am sure there is a wide range in between what "basically works" and what is the absolute optimum.
I think the same principle applies to the use of templates/fixtures in guitar construction. There is quite a range between "whittled out freehand" and CNC, but it all can work and I think Sloane strikes a good balance for a builder that is not going into mass production. |
#28
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Unless you're using steam under pressure you'll get the same temperature with either steam or boiling. That's physics.
Usually there's enough water in the wood to begin with to bend it. The trick is to get it up to temperature fast, so you don't drive out the water that's there, and bend it to shape. Then you hold it in that shape until it cools off. Water seems to lower the temperature at which you can bend the wood. As you drive the water out, the bending temperature goes up, and at some point, when the wood gets dry enough, you need to heat it to the point where it scorches before it will bend. Water also seems to weaken the bonds between the wood fibers, particularly in tension. Wood that's too wet can peel apart on the outside of the bend, particularly if it's figured, like curly maple. The rule with bending figured wood is:"more heat, less water". Adding water in the inside surface helps in three ways: it lowers the bending temperature, keeps the water content higher for longer, and helps conduct heat through the thickness of the wood. If there's any tendency fr the wood to cup or warp, adding water will bring in out. That's another reason to avoid adding too much to figured wood, where the squirrely grain can lead to warping. Once you've bent the wood it will tend to pick up any moisture it has lost, and this will usually relax the bend. Putting the sides in an outside mold while this happens can help keep them in shape. |