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 Post subject: Neck backbow
PostPosted: Mon Dec 06, 2010 2:19 pm 
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Cocobolo
Cocobolo

Joined: Fri Mar 06, 2009 9:57 pm
Posts: 117
First name: John
Last Name: Neal
City: Arcadia
State: ok
Zip/Postal Code: 73007
Country: usa
Focus: Build
Status: Amateur
I call it a backbow but not sure if that is the right term. It is bowed toward the fingerboard and happened after glueing fb on. Fb has hump. It had a slight bow before I glue it on but now its bad. I can straighten out with the truss rod (two way rod) but it takes alot of force. It's a 7 pc. with African mohagany on the sides and maple/bloodwood in middle. This was all plain sawn lumber from woodcraft. Don't Know if I should try to fix it or try to remove fb and headplate and make new neck with qtr. sawn lumber this time. The fb has block inlays and headplate has an eagle inlay so don't want to trash them. Any suggestions?


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 Post subject: Re: Neck backbow
PostPosted: Mon Dec 06, 2010 2:53 pm 
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Brazilian Rosewood
Brazilian Rosewood

Joined: Tue May 13, 2008 10:44 am
Posts: 6261
Location: Virginia
Hard to say without seeing it but it doesn't sound too good and fretting it will only compound the problem. Should be easy enough to salvage the FB and head plate and start over though.


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 Post subject: Re: Neck backbow
PostPosted: Mon Dec 06, 2010 3:20 pm 
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Contributing Member
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Joined: Sun Jan 27, 2008 4:10 pm
Posts: 2764
First name: Tom
Last Name: West
State: Nova Scotia
Country: Canada
Focus: Build
Status: Amateur
Not much info,actual measurements....??

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 Post subject: Re: Neck backbow
PostPosted: Mon Dec 06, 2010 4:55 pm 
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Koa
Koa
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Joined: Tue Apr 01, 2008 8:51 am
Posts: 1310
Location: Michigan,U.S.A.
Focus: Build
Status: Professional
If not fretted yet just level the board on the neck if it's not too extreame.


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 Post subject: Re: Neck backbow
PostPosted: Mon Dec 06, 2010 6:08 pm 
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Cocobolo
Cocobolo

Joined: Fri Mar 06, 2009 9:57 pm
Posts: 117
First name: John
Last Name: Neal
City: Arcadia
State: ok
Zip/Postal Code: 73007
Country: usa
Focus: Build
Status: Amateur
It's pretty extreme. When I loosen up the truss rod and put a straight edge on the fretboard I have about 3/64" at both ends. the fb itself had a little bit of dive in it before I glued it on. I was planning on leveling it after it was installed on the neck. the trussrod will bring it straight but I don't really want to stress it that much.I rough shaped the neck to see if that helped any and it did make it easier to straighten. I've tried to remove a fretboard once before on a different build and ruined it. I would'nt mind scraping the hole mess if it were'nt for the inlays.I think I can get it off ok this time useing a heat lamp. I didn't know if there was some kind of trick to straightening a neck with water and heat or something. It was glued on with titebond original. No not fretted yet.


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 Post subject: Re: Neck backbow
PostPosted: Mon Dec 06, 2010 8:29 pm 
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Koa
Koa
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Joined: Tue Apr 01, 2008 8:51 am
Posts: 1310
Location: Michigan,U.S.A.
Focus: Build
Status: Professional
How thick were your inlays? You might get away with it if they were thick enough. You can also try clamping the neck in a caul bowing it the other way and applying heat and letting it cool for a day or so then recheck it. That should help some and get you in the ballpark to relevel. Some of the backbow will be taken out when you string it up also. Just the tension of the strings will do that.


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 Post subject: Re: Neck backbow
PostPosted: Mon Dec 06, 2010 9:37 pm 
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Koa
Koa
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Joined: Tue Oct 30, 2007 9:13 am
Posts: 1167
Location: United States
State: Texas
Focus: Repair
Status: Professional
Glued with Titebond?

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