alleycat comments on Current progress on my Vihuela de Mano

Current progress on my Vihuela de Mano (thelemmy.club)

submitted 3 days ago by alleycat@feddit.org to c/woodworking@lemmy.ca

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CNC-cutting the sides to shape before bending worked surprisingly well. I had left 10mm extra at each end, but that turned out to be unnecessary. The back will have a 3000mm radius and the top will be bent slightly inwards for stability.

[–] alleycat@feddit.org [S] 3 points 2 days ago (3 children)

The shop I bought the radius dish from had everything in millimeters. So I assume it's trade standard in Europe? Also, in engineering you have everything in millimeters, no matter how big (outside the US).

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[–] gibmiser@lemmy.world 4 points 2 days ago (2 children)

No, that's not the issue, I thought it was a typo. A 3 meter radius for the back... im not sure what you mean but it sounds way too large for a guitar, whatever the measurement is for.

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[–] grue@lemmy.world 7 points 2 days ago*

He means the amount the back bulges out instead of being a flat plane. The arc of it is curved the same amount as a segment of a circle with a 3 meter radius. The bigger the radius, the less the back curves.

Think a situation like this, except with a smaller surface area:

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[–] Rugnjr@lemmy.blahaj.zone 6 points 2 days ago

It's being bent. The wood won't cover the entire circle, only some small arc segment, by my understanding. A smaller radius would be a much more dramatic bend (and probably break)

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