I know this is a ukulele board, but I’ve gone temporarily over to the dark side and I’m working on a dreadnought guitar with a 25.4” scale. I'm not a member of any of the guitar boards and thought I'd ask here first.
I don’t bother with a neck angle on ukes as I’ve found they’re not necessary, but I’m pretty sure that a guitar of this size needs one.
So I’m investigating various methods to determine the proper neck angle. My aim is to have a saddle that extends 1/8” above the bridge. The bridge will be 5/16” thick and the radiused fretboard will be ¼” thick in the center before frets are installed. The frets have a .039" crown height.
Robbie O’Brien and LMI have a video online in which he places a 0.98” to 1.38”shim at the saddle location and lays a straightedge with one end resting on the shim and the other directly on the soundboard where it meets the heel of the neck. He duplicates the angle with a sliding bevel and transfers the angle to the neck blank. He makes no mention of fretboard and bridge thickness. Using this method, I come up with a neck angle of about 2 degrees for my guitar.
In their book, Cumpiano & Natelson discuss a different method in which they lay one end of a straightedge against a fretted fingerboard at the neck joint location and the other end 1/64” to 1/16” above the top of the finished bridge. They transfer the angle to the neck blank in the same way O’Brien does.
For those of you who build guitars: how do you do this? Is a simple 1/8” shim sufficient using the O’Brien method? Or do I need to make the fretboard and bridge first (or properly thicknessed equivalents) as in the Cumpiano book? Any insights or advice are greatly appreciated!
I don’t bother with a neck angle on ukes as I’ve found they’re not necessary, but I’m pretty sure that a guitar of this size needs one.
So I’m investigating various methods to determine the proper neck angle. My aim is to have a saddle that extends 1/8” above the bridge. The bridge will be 5/16” thick and the radiused fretboard will be ¼” thick in the center before frets are installed. The frets have a .039" crown height.
Robbie O’Brien and LMI have a video online in which he places a 0.98” to 1.38”shim at the saddle location and lays a straightedge with one end resting on the shim and the other directly on the soundboard where it meets the heel of the neck. He duplicates the angle with a sliding bevel and transfers the angle to the neck blank. He makes no mention of fretboard and bridge thickness. Using this method, I come up with a neck angle of about 2 degrees for my guitar.
In their book, Cumpiano & Natelson discuss a different method in which they lay one end of a straightedge against a fretted fingerboard at the neck joint location and the other end 1/64” to 1/16” above the top of the finished bridge. They transfer the angle to the neck blank in the same way O’Brien does.
For those of you who build guitars: how do you do this? Is a simple 1/8” shim sufficient using the O’Brien method? Or do I need to make the fretboard and bridge first (or properly thicknessed equivalents) as in the Cumpiano book? Any insights or advice are greatly appreciated!
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