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Thread: Compound radius again

  1. #1

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    Hello ,
    After trying some instruments with compound radius last summer , I want now made only compound radii on the instruments I make .
    I've imagined this gig , and try it with a piece of nonvalue wood .
    Look at it



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  2. #2

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    The gig is 40cm long , which represent the scale of a mando 35cm + 5cm for the sanding work . On the left of the picture above there's a piece of plexiglass with a radius a little less than the radius needed at the nut . Say if you want 7,5" at the nut , the plexi must be 7" radius .
    On the right of the picture above , the other piece of plexi is flat and is supposed seem to be where the bridge is .
    The sanding block is just 1,5cm tick and have not sandpaper all along . two wood screws have to limit the movement during the process .
    All I can say today after my first test : It works .



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  3. #3

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    another view
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  4. #4
    Registered User sunburst's Avatar
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    Simple in design and elegant in function. Good job!

  5. #5
    Registered User amowry's Avatar
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    Very nice! That's very similar to what I use on my belt sander, but I wouldn't have thought of using it for hand-sanding as well.

  6. #6
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    nice, Jean. Very simple and it avoids some potential pitfalls of doing it on a powered sander as long as your sanding board has little to no flex.
    Austin Clark
    http://www.clarkmandolins.com

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    @scrollenvy on Instagram

  7. #7
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    Jean, that is a very good tool you have made! Now everyone will make one like yours.

  8. #8
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    Jean,

    Congratulations. What a nice concept.
    Dan

    '14 A-1
    '04 Rigel A+
    Draleon Royale
    Glenn Student F
    Petersen OM
    RISA Travel Mando

  9. #9

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    Ho thanks you for your nice replies , i'm very pleased .
    I've improved the system by using a straight aluminium ruller , with a piece of 80 sandpaper glued on . the black collar on the left is here for stop the movement and preserve the plexi .
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  10. #10

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    in situation
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