Bassistlaw
Newbie
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- 12
Oops my bad! I use this type of double truss rod with the nut welded on for my own “from scratch” builds. It works both ways!
Unfortnately, the call ended without them agreeing to any concrete action. Just that I could send it back again if it still has issues. They weren't even willing to say that they'd check it again just in case.
If you still have issues after you get it back,bring it to your local tech who works on guitars for a living. Get his sincere opinion and solutions.
I'm glad the OP feels that Warmoth at least 'made him whole.'
I just wanted to correct what I believe is some misinformation regarding the compound radius and the straight edge. With a compound radius on a fretboard, you either have to vary the thickness along the centerline, or vary the thickness along the fretboard edges - it's simple geometry since the fretboard width is fixed.
Another way to put it: To turn a 10" radius into a 16" radius, you have to sand down the center of the fretboard until the radius sander meets the board at the edges.
I did a mock-up of a 10" and 16" radius, keeping the thickness the same at the fret ends (by the E-e strings). The difference in thickness in the center is 0.023". So the fretboard of a compound radius will be 0.023" thinner in the center, between the D-G strings, at the pickup end.
The height of a 6105 fret above the fretboard is 0.059". The OP's straight edge shows a gap of a little more than half the height of the fret, so .023" is pretty close to that. I'm sure there is some tolerance in the sanding and possibly in the way the straight edge is being used on a curved surface.
In my own experience I've learned that the slotted straight edge is just a reference point. Ultimately we measure string to fret height for setups, and there's almost always some variation between how the frets were fit and sanded versus the plane of the fretboard.
wouldn't it be very, very, very bad if the Big W sanded down the middle of the fingerboard to get the 16" at the end? the string heights on the middle strings would be a disaster, let alone fretting something made that way. u definitely want the center of the FB to be consistent thickness, so I think they vary the edges, allowing them to "Come Up" to create that flatter surface at the higher frets. it's the only thing that makes senseI just wanted to correct what I believe is some misinformation regarding the compound radius and the straight edge. With a compound radius on a fretboard, you either have to vary the thickness along the centerline, or vary the thickness along the fretboard edges - it's simple geometry since the fretboard width is fixed.
Another way to put it: To turn a 10" radius into a 16" radius, you have to sand down the center of the fretboard until the radius sander meets the board at the edges.
The width of a fretboard is not fixed. The taper and increase in string spread is actually the whole reason to use a compound radius (aka conical section) instead of a cylinder. But either way, the "crown" of a conical section (or cylinder) is absolutely, 100% a straight line. This is all just high school level geometry, cuboids (the initial tapered fretboard) sliced by cones, but I'm not so sure I'd call it simple. I have a BS in Physics, so hard math problems are kinda my jam, and this stuff makes my head hurt.I just wanted to correct what I believe is some misinformation regarding the compound radius and the straight edge. With a compound radius on a fretboard, you either have to vary the thickness along the centerline, or vary the thickness along the fretboard edges - it's simple geometry since the fretboard width is fixed.
The way you've set up the problem you are correct that it's thinner toward the end defining the larger radius, but there is still no curve in the center line because it tapers down evenly. It's a straight line that you can put a straight edge on. In this case the line is just no longer parallel to the back.I did a mock-up of a 10" and 16" radius, keeping the thickness the same at the fret ends (by the E-e strings). The difference in thickness in the center is 0.023". So the fretboard of a compound radius will be 0.023" thinner in the center, between the D-G strings, at the pickup end.
For sure, you're completely right. The only surface that really matters is the one created by the tops of the frets. In theory the top of the fretboard can be as crazy as you want and little variations can be dealt with in leveling. But the OPs case is one where the frets (and the nut) would have to be massively different in order to define a proper surface.In my own experience I've learned that the slotted straight edge is just a reference point. Ultimately we measure string to fret height for setups, and there's almost always some variation between how the frets were fit and sanded versus the plane of the fretboard.
It's all a matter of angles, what you're looking for, and how you compensate for things, but I checked my canary neck I recently got and eyeballing it with calipers the fretboard sides at the nut end look slightly thinner. There's a lot of angles and curves going on, but it suggests to me that they let the edges do what they will and make sure the crown of the fretboard is parallel with the surface it's glued to (and also parallel to the heel). This way you get a nice straight line parallel to the body heading to the bridge without having to do a bunch of compensation.wouldn't it be very, very, very bad if the Big W sanded down the middle of the fingerboard to get the 16" at the end? the string heights on the middle strings would be a disaster, let alone fretting something made that way. u definitely want the center of the FB to be consistent thickness, so I think they vary the edges, allowing them to "Come Up" to create that flatter surface at the higher frets. it's the only thing that makes sense