Compensation for short scale (Full Version)

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kominak -> Compensation for short scale (Jun. 21 2017 10:59:21)

Hello,

I'd like to ask about bridge placement vs scale length. When building my #1, which has 660mm scale, I used compensation as per Anders' recommendation: 1mm for treble side and 1,5mm for bridge side (resulting in 661 / 661,5mm scale length).
I'm building small Torres-style guitar now, which has much shorter scale (604mm). Can I use the same compensation or should it be more/less?

Many thanks,
Martin



Stephen Eden -> RE: Compensation for short scale (Jun. 21 2017 11:33:39)

Yeah no problem. I've recently made a 570mm with a flat 1.5mm compensation with no problems.



Njål Bendixen -> RE: Compensation for short scale (Jun. 21 2017 19:25:09)

Classicals require a little bit more compensation than flamecas, because on a classical there is a little bit more string height, thus more need for compensation. Just one more thing to consider (and confuse).

I have always scaled scale length and compensation up or down by the same factor. Eg if I increased the scale length by a factor of 1.01539; then I would also increase the compensation by a factor of 1.01539.

Scale 650mm x 1.01539= 660mm.
Compensation 2mm x 1.01539= 2.094mm

As you can see it is almost not enough to make a practical difference.

One thing to remember: The scale length is the theoretical uncompensated string length, so if you change the amount of compensation, but you leave the frets and the nut be, then you have not changed the scale length, only the vibrating string length.


Njål



Anders Eliasson -> RE: Compensation for short scale (Jun. 22 2017 6:40:17)

To make a really good compensation, its better to make it a tad shorter than longer. That way you can do the final adjustment in the saddle-bone. Thats impossible if the saddle-bone is to far behind.
I have never done a guitar with such a short scale, so I would just do as SEden wrote. flat 1 - 1,5mm depending wheather its a flamenco or classical setup.



kominak -> RE: Compensation for short scale (Jun. 22 2017 13:35:52)

Many thanks for your replies - will do as suggested.

Martin



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