Trying to drew 12" compound radius on paper to make line on 70 wide block for cutting it .
Google didn't help me. I tried to drew half circle. Didn't help or I didn't know how to use it.
I'm trying to make radius sanding block. My math knowledge is only estonian school 1-9 grade. I haven't learn more yet. I Have right now no idea what to search more on google. Or what too.
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If I measure radius between frets and sand 3-5 frets with radius block. I think that Works.
I don't know if I even need to do something like that. Only problem is that I don't have radius sanding blocks.
Right now I don't wanna sand fingerboard in radius. I wanna sand frets in radius.
This is what I do. First make sure all the strings are working on all the frets without string bending. No fretting out, no buzzes, etc.
Then start working on the bending part. Start string bending at each fret all the way up the neck. Do the kind of bends that you do most often (probably mostly the G, B, and E strings). Wherever you run into fretting out make on mark on the fret with a Sharpie marker (black permanent marker).
Then go back and sand or file the blackened areas flat. So basically, you will be making the black areas shiny silver again. Repeat until everything is bending smoothly all up and down the neck. Then you'll need to recrown the flattened frets so there isn't any buzzing.
You should be able to do this with the basic tools available to you (flat file or sanding block, and a triangular file to recrown). It can help if the sharp triangular edges on the triangular file are ground off a bit so they don't dig into the fretboard and make marks you don't want.
Here you go. A compound radius jig for your router...
https://www.youtube.com/watch?v=BNm5G84ht5A&feature=youtu.be
Right now I don't have router.
Like the Phrygian Kid is saying, to make a compound radius, you need several different radius blocks. So you have to know what radii you want to go from. So let's say it's 12" to 16". So then you'll need a 12" block, a 14" block, and a 16" block. Each block should be about 4" long (like the ones they sell at Stew Mac). I've done a compound radius this way.
But there are problems with using the short blocks like this in keeping everything straight and level. It's also an awful lot of sanding.
Nowadays, I just do a straight 12" radius and work out any string bending problems above the 12th fret by making the frets flatter in that area until the buzzing or fretting out is gone. If you're not doing any string bending, I don't see any point in doing any of this.
I do string bending and vibratos.
Wiki is saying
Fretboard maker said that he maked compound 12" radius.
It think tha this is compound, from 12" (nut) to 16" (heel)
I wanna give guitar frets radius. Right now frets are all equle.
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