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Tom Blackshear -> RE: How relief is perfectly adjusted? (Sep. 10 2015 16:18:59)
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quote:
ORIGINAL: Ahmed Flamenco
If the fingerboard is 100% flat when it is glued on a mahogany neck without reinforcement should relief be applied?,if so how?
Ahmed, are you referring to your guitar build as a new instrument?
If you are, then the straight board will probably pull up to a little curve after the guitar is a few days old.
If you purposely built it completely flat with no curve, after being strung for a few days without frets, then the peak of any curve would be very slight with age. Guitar Wood will bend under any presser to a certain extent.
And the way I make a straight board is to string up the guitar at concert pitch with no fret wire for about a week, and then resurface the fingerboard to be straight, and this will help it stay straight for a longer period of time.
If I wanted the board to have a little curve than I install frets before I string up the guitar and allow the string tension to pull a slight curve that way. Or with carbon strips I build a little curve before installing frets.
I use Spanish cedar for my builds so there might be a slight difference with Mahogany.
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