geoff-bristol, good idea: "Get scale readout and draw up a paper pattern"!
I did a variation and drew it up on a plastic Venetian blind slat with dimensions from StewMac's calculator using 650 mm and 19 frets as inputs https://www.stewmac.com/FretCalculator? ... nstrument=
I used a 150 mm digital vernier caliper and started from nut to fret 4, then fret 4 to 10, then 10 to 19 to lessen the compound error. After I finished making the scale, I noticed the following note on StewMac's site.
"Bridge placement for 650.000mm scale length
Distance indicated is from the fretboard edge of the nut, to the break-angle of the string at the peak of the saddle.
Treble "E" or 1st string: 652.266mm (± 0.5mm)
Bass "E" or 6th string: 655.470mm (± 0.5mm)
Please note that these measurements are based on a mathmatical formula for compensation as well as an average of what "plays in tune" for a variety of instruments. Variables such as string height (action) and string gauge can affect the intonation of an instrument, so you may need to slightly adjust the locations given."
Based on the above, my scale length input for the calculator should be less than 650 mm, so the venetian slat I drew up is invalid and needs to be re-done.
Since I am not going to move the bridge or nut, I have to work backwards based on the distance between nut to saddle and arrive at a compensated scale length as the input to the calculator if I want to buy a pre slotted fret board from LMI.
Am I making any sense?
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