Acoustic Guitar Construction

l' m laying out a non- standard scale fretboard. I have done the calculations for the fret spacing and need to know the acceptable accuracy. Is it .x or .xxx in inches? If I use mm is it .mm or attempt even closer tolerances?

I calculate and measure mine out to .xxx but not sure exactly how close I get when cutting. Haven't noticed any glaring issues.

Thanks Tim, I think for all practical purposes trying for .xxx and hitting .xx should work. Not having a cnc machine, anyway....poor me. :-)

What sort of measuring device do you use, T?

Digital calipers but don't go from one to the next, take each measurement from the nut until 4th (I think), then 4th to 11th finally 11th to 20th.

For non standard scales I always use 'W Fret' which is downloadable from MIMF http://www.mimf.com/phpbb/viewtopic.php?f=32&t=921 Print it out full size, stick it to your fretboard and always saw to one side of the lines rather than the centres.

Bob

Thanks to both of you. I do notice that Incra sells a precision rule that allows marking to the 1/4 mm range on a 300mm rule. If I'm not mistaken, that means a possible error of .125mm, which = .004" at each fret. That should be close enough, yes? So I could always go that route, I suppose. I'll try your suggestions first.