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First guitar build question http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=33896 |
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Author: | jjl [ Sat Oct 15, 2011 10:26 am ] |
Post subject: | First guitar build question |
I am building my first guitar (classic) and I just received my material from a supplier. I thought I would use the suppliers side bending service since I don't have the tools or experience for this, the cost was reasonable and the service included sanding to the correct thickness. The wood for the sides is Indian rosewood. My question is what quality of bending should I have expected. One of the bends has a 'kink' to it and the vertical sides in spots is cupped. Is this typical of the bending and can this be corrected during assembly? Any help would be greatly appreciated - Thanks John |
Author: | Daniel Minard [ Sat Oct 15, 2011 11:06 am ] |
Post subject: | Re: First guitar build question |
Hi John; A picture would be helpful, if you are able to post one. Cupping is fairly common after bending & as long as it is not extreme, you can usually sand it out. How thick are the sides? The "kink" is a bit worrying, though. It might be an indication that the wood has fractured. Without actually seeing & feeling the side, it's hard to tell if it really is a problem. Is there any sign of a crack at the kink? Do you have a bending iron? You could try to straighten out the kink & re-bend the curve, but check with the supplier first in case there is a crack & you end up breaking the side. Good luck... Dan |
Author: | klooker [ Sat Oct 15, 2011 3:13 pm ] |
Post subject: | Re: First guitar build question |
In my opinion (which ain't worth much), if you are paying someone to bend the sides, they should be pretty smooth or have just the tiniest ripples that will easily sand out. Kevin Looker |
Author: | runamuck [ Sat Oct 15, 2011 3:24 pm ] |
Post subject: | Re: First guitar build question |
Based on your description, I would send them back. |
Author: | jjl [ Sat Oct 15, 2011 7:07 pm ] |
Post subject: | Re: First guitar build question |
I have attached some photos of the side bending. The cupping shows up very well and I was able to measure the depth of the cupping at just about 3mm which is almost 50% more thne the wood thickness. The poor bend profile was hard to capture in a photo but when you run your hand over the bend it is very obvious. Thanks to those who replied. Attachment: poor_bend3.JPG
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Author: | nickton [ Sat Oct 15, 2011 9:29 pm ] |
Post subject: | Re: First guitar build question |
looks like a pretty nasty clamp mark there, but depending on where you cut it down it may not show up, except I bet it's already cut down to final taper. Sometimes cupping and dings can be ironed out with a wet rag, but not so easily on a curved area of course. Anyhow it looks minimal to me. If you'd bent it yourself it wouldn't be so bad because these are areas that won't affect the sound or playability really IMHO. I would at least send pics back to the supplier. I wonder how much they charged. If cheap then not such a big deal. Wood is not perfect anyway. If you don't want it send it to me. ![]() |
Author: | Ken Franklin [ Sun Oct 16, 2011 1:39 am ] |
Post subject: | Re: First guitar build question |
Send it back. |
Author: | Ti-Roux [ Sun Oct 16, 2011 1:57 am ] |
Post subject: | Re: First guitar build question |
It is commun and normal that wood moves, cup or warp, especially after wetting and heating it. Also, sides spring back after bending, so you can't expect a perfectly bent pair of sides when somebody do it for you, then send it to you, but in that case, it really looks like a poor bend. Send it back. |
Author: | Colin North [ Sun Oct 16, 2011 6:49 am ] |
Post subject: | Re: First guitar build question |
Ouch - definitely send back, especially if it stays that way at 45% RH. Any decent piece of rosewood should not cup that much if properly bent. |
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