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Thread: Some Mundane Luthier Work

  1. #1
    Join Date
    May 2018
    Location
    Kekaha, Kauai
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    280

    Default Some Mundane Luthier Work

    Needed to resaw some koa for some vintage model concerts this morning. Found a good billet measuring 2
    Bradford Donaldson
    Kekaha, HI and Cannon Beach OR
    bradfordj48@outlook.com

  2. #2
    Join Date
    May 2018
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    Kekaha, Kauai
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    https://photos.app.goo.gl/tGJqkL31DTYyf4Tm7
    Here are the pics I meant to post above. Six slices nominally .100” thick from a 2” x 5.5” x 16” piece of koa gave me enough for two complete vintage model concerts and enough left over for two more tops and backs.
    Brad
    Bradford Donaldson
    Kekaha, HI and Cannon Beach OR
    bradfordj48@outlook.com

  3. #3
    Join Date
    Mar 2009
    Location
    Stockton on Tees..North East UK.
    Posts
    5,465

    Default

    Hi Brad...interesting photos...the round bar thingie on the fence does it work better with it fitted ? If it is better! then I will have to make one .
    http://ukulele-innovation.tripod.com ebay i/d squarepeg_3000 Email timmsken@hotmail.com

    If you can believe that moving images and sound, can fly through empty space across the universe and be seen and heard on a box in your living room ?.. then you can believe in anything.

  4. #4
    Join Date
    Nov 2015
    Location
    Maine, USA
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    25

    Default

    Nice looking koa.

    Personally, I find resawing wood to be one of the fun parts of building. Each cut is like turning the page of of book, and seeing the face of an instrument for the first time.

  5. #5
    Join Date
    May 2018
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    Kekaha, Kauai
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    Hey Ken, I discovered the drift bar for the fence some years ago when my Sears Craftsman 12” finally died after 30 some years. The bar came with the 14” Rikon that I replaced it with. I find it is the only way I can use a fence to help guide things. It compensates for wood that is not perfectly flat and square and allows you to steer things when you encounter some wonky grain.
    Brad
    Bradford Donaldson
    Kekaha, HI and Cannon Beach OR
    bradfordj48@outlook.com

  6. #6
    Join Date
    Oct 2014
    Location
    Little River, California
    Posts
    2,566

    Default

    Nice wood. Nice work... I like the idea of a "drift bar" bar for band saw work. Very interesting. Gives you some play on the cut... 0.1 inch cut is pretty good by way. Must make thicknessing so much easier I'll bet.

  7. #7
    Join Date
    May 2018
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    Kekaha, Kauai
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    OK, moving on to some less mundane things. I am building this ukulele at a friends request for a Christmas present for his wife. I know that Jonah Kumalae made some concert sized ukulele back then. This is my attempt at reproducing such an instrument. And just for something different I am using an inside mold method of construction as shown in Graham McDonalds book. My thanks to Graham and Ken Timms for the information they provided. The one hack I have made in the assembly form is to taper the sides of the cauls as well as the wedges. This keeps the bottom of the cauls flat against the form.

    https://photos.app.goo.gl/fHXVJ7aNuJDnnMEQ6
    Brad
    Bradford Donaldson
    Kekaha, HI and Cannon Beach OR
    bradfordj48@outlook.com

  8. #8
    Join Date
    Sep 2013
    Location
    Hawaii Island
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    Brad-Some time ago a friend that shows up here occasionally, guided me toward resawing off the open side of the wood rather than between the fence and the blade. For thin repetative cuts, it will change your resawing experience. More cuts and you don't have to deal with the curves and drift that increase with every cut you make. The flat, square side that you start with is always against the fence. Does not matter for larger simple cuts like splitting a 2" board in 2, but makes a huge difference when splitting that same 2" board into slices a few mm thick. The fence gets moved every cut by the thickness of the slice to be cut. You have to invent a way to move the fence the right amount, but that was not too hard. Probably lots of ways to do that.-Bob

  9. #9
    Join Date
    May 2011
    Location
    So. Oregon
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    1,779

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    Bob, you're so right! When I visited Les Stansell a few years ago, he showed me the Laguna Driftmaster fence on the big Laguna that he uses for resawing. As you might guess from the name, it has a convenient mechanism to adjust for drift but, more to the point, it has a large crank that shifts the fence about .070" per turn. This makes it easy to slice consistent plates off of a board while keeping the flat, smooth side against the fence. I've tricked mine out with a dial indicator on a magnetic base, which provides a little better repeatability.


  10. #10
    Join Date
    May 2018
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    Kekaha, Kauai
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    Thanks very much Bob. I was aware of the method of resawing off the back side of the billet, but do not do so because of the need to reset the fence for every cut. Maybe as you say there is an easy way to repeat the thickness setting, but I have not found it yet. In fact in this case it took me three cuts to get the fence down to a nominal 2.5 mm. The first try was 3.0 mm, the next was 2.75 mm and the 3rd through the 6th were 2.5 mm. My work around to avoid the increased wavyness in subsequent cuts, is to dress the billet on my 6”x48” belt sander to dead flat after each cut. So just like cutting off the backside, you always have a flat and level surface against the drift bar. So in the end, you can reset the fence in between cuts, or you can dress the billet face in between. My feeling is you are going to have to clean up the faces sometime! As you say, lots of ways to get it done.
    Brad
    Bradford Donaldson
    Kekaha, HI and Cannon Beach OR
    bradfordj48@outlook.com

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