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Post by jfc on Nov 11, 2007 21:57:05 GMT
The wenge back on the geetar i made has started to open up . Two cracks i can see light through either side of the book match join . Is this stress related to guitars or just the wenge ?  |
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Post by jfc on Nov 11, 2007 22:16:41 GMT
well i'm pretty sure its not my bad playing ;D I think it is the wenge as the cracks started pretty soon after bringing it in from the work shop but i noticed tonight i can see light through them . The cracks started pretty soon after i took it out of the workshop but it must be 6 months now and they have started to let in light .
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dunbarhamlin
Full Member
Lutherie with Luddite Tendancies
Posts: 244
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Post by dunbarhamlin on Nov 12, 2007 0:59:49 GMT
Dammit - nice looking instrument too.
Either side? Do these coincide with the edges of the back graft? If not well chamfered, it can produce a stress riser at it's edges - a focal point for splitting stresses.
That the cracks started shortly after bringing it in from the workshop makes me wonder if the humidity was a bit high during glue up. I'm getting ready to glue up now, since the heating's back on and things are drying out. It is a major issue with guitars and similar instruments because of the thinness of the plates and inherent stresses of induced arch construction.
I'm not the best to ask about repair options - would suggest posting at luthierforum.com, luthiersforum.3element.com or mimf.com
If it is humidity related, may be able close the gaps by rehumidifying the instrument and applying a cloth patch with HHG through the sound hole - but if right against the sides of the back graft, more drastic measures probably required.
Cheers
Steve
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Post by andy on Nov 12, 2007 21:31:18 GMT
Jason, you could always use it as a paddle while you wait for your outboard engine to arrive ;D How long have you been waiting  |
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Post by mignal on Nov 13, 2007 21:03:06 GMT
Tut,tut. Always glue at close to 45% RH as possible and try to keep the guitar fairly close to that. Building at high humidity and placing it in a low humidity environment is a recipe for disaster. Look at MIMF.com under the 'repair' section, some chaps had pretty much the same issue.
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Post by jfc on Nov 13, 2007 21:08:44 GMT
Well it seems the solution is to dip a couple of Tampax in water and wring them out and drop them in the body . Then cover the sound hole with gaffa tape ;D
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Post by davyowen on Nov 13, 2007 21:18:33 GMT
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Post by jfc on Nov 13, 2007 21:30:04 GMT
I can buy a box of 100 for that price  And have the fun of slapping them up against next doors wall after ;D |
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dunbarhamlin
Full Member
Lutherie with Luddite Tendancies
Posts: 244
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Post by dunbarhamlin on Nov 14, 2007 8:42:43 GMT
Hahaha animal. Next you'll tell us you play in the death metal Beatles tribute band
'Death Watch Beatle'
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Post by seanybaby on Nov 14, 2007 16:45:59 GMT
Nice guitar Jason  How do you pronounce wenge? wen-ge? wenje? I feel like a tit when pronouncing timbers the wrong way. |
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Post by jfc on Nov 14, 2007 17:12:12 GMT
I say it like winge (moaning) but with the "e"
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Post by engineerone on Nov 14, 2007 19:17:22 GMT
nothing new then "winge" ;D hat coat paul  |
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