Context: I'm an experienced player. Pretty fluent with routine guitar maintenance, and putting a few parts guitars together. I'm no luthier but I've learnt a lot over the years.
My question arises from some reading I'm doing for my next challenge - a refret on a surplus neck that Id like to use for a project.
I've been reading Hideo Kamimoto's "Electric Guitar Setups". Hideo has a table in his book which I find interesting, and dont quite understand fully. The table titled "Relief Calculations" appears to give relief measurements for each fret interval on a guitar neck. The relief measurements are in columns (Nut to Fret 12). There are then several rows in the table for relief at action increments of 64th inch. I've replicated the first few rows below...
Action (64s) 0 (Nut) 1 2 3 4 5 6 7 8 9 10 11 12 1.0 0.000 0.001 0.002 0.003 0.003 0.003 0.003 0.003 0.003 0.002 0.002 0.001 0.000 2.0 0.000 0.002 0.004 0.004 0.005 0.006 0.007 0.006 0.006 0.005 0.004 0.002 0.000 3.0 0.000 0.003 0.006 0.008 0.009 0.010 0.010 0.010 0.009 0.007 0.005 0.003 0.000
So the table implies that, for a guitar with 3/64 action (at 12 fret), you need to look for relief of 0.010 at 6 fret (fretted at 1 and 12 fret). I kinda understand that, what I don't understand is that....
(1) the table implies a that higher action would require greater relief
(2) That no relief should occur beyond fret 12.
Im confused. Esp as Fender and others recommend measuring relief at neck/body join. The higher action=more relief implication boggles my mind.