I have a back that is in 2 pieces, with a decorative strip down the middle. One thing that bothered me was that the two back pieces had slight warps in them. Very minor, but I didn't want to take a chance.
I was going to use John's approach, and glue them and pull the pieces together with tape, but was afraid the warping might make things go awry.
So, I used a tip from Robbie O'brien's dvd.
Took the granite slab, applied some wax paper under the glue joints, and clamped a wooden brace at a slant that corresponded to the back. Laid out another brace for the 2nd side the same way, kind of creating a funnel. I then glued up the joints and slid them into place, slightly wedging them into each other. Used a couple of 12 packs of soda, 5 lbs of corn meal and a drill to hold everything down.
Even clamped a couple of wedges at the bottom end so they wouldn't come back out.
Changed out the picture to better show the jig.
Came out fine:
Bob
This ain't the pretty part.
Back joining jig
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Back joining jig
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Re: Back joining jig
I like to use my 'luthier's ream-of-copy-paper'! you have to get just the right weight (60lbs text) and brightness (no more than 98), or the joint will suffer though ;)
Darren
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Re: Back joining jig
I didn't know Pepsi had a luthier devision
John Hall
Blues Creek Guitars Inc
Authorized CF Martin Repair Center
president of Association of Stringed Instrument Artisans
http://www.bluescreekguitars.com
Blues Creek Guitars Inc
Authorized CF Martin Repair Center
president of Association of Stringed Instrument Artisans
http://www.bluescreekguitars.com
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Re: Back joining jig
Ya'll iz funny!!
Bad thing about the Pepsi weights is they keep disappearing.
Bad thing about the Pepsi weights is they keep disappearing.
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Re: Back joining jig
Now that's what I'm talkin' about!
Guess I coulda rolled a car wheel over it and left it all night.
Nothing like a $25,000 clamp.
Guess I coulda rolled a car wheel over it and left it all night.
Nothing like a $25,000 clamp.
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Re: Back joining jig
The glue will set up faster if you use regular Pepsi instead of the caffeine free.
If you can't do something well, learn to enjoy doing it poorly.