# Fender Fuzzy Math Intonation

Discussion in 'Hardware, Setup & Repair [BG]' started by James Willie, Feb 17, 2020.

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1. ### James WillieSerious BusinessSupporting Member

Jul 29, 2016
Lake Texoma
There must be at least a million articles about intonation. Trying to install a new bridge onto a new body. 34 inch scale. Found this excerpt from the Fender web site.

Set Your Intonation (Excerpt From Fender)

You can preset the basic intonation of your guitar by taking a tape measure and measuring from the inside of the nut to the center of the 12th fret (the fret wire itself; not the fingerboard). Double that measurement to find the scale length of your guitar. Adjust the first-string bridge saddle to this scale length, measuring from the inside of the nut to the center of the bridge saddle.

Now adjust the distance of the second-string saddle back from the first saddle, using the gauge of the second string as a measurement. For example, If the second string is .011" (0.3 mm), you would move the second-string saddle back .011" (0.3 mm) from the first saddle. Move the third saddle back from the second saddle using the gauge of the third string as a measurement. The fourth-string saddle should be set parallel with the second-string saddle. Proceed with the fifth and sixth saddles with the same method used for strings two and three.

String Measurements (From Wikpedia)

Gauges of a string's thickness measured in thousandths (0.001) of an inch.
Equal to 1⁄1000 of an inch.

String Measurements

G string 45 thousandth of an inch
D string: 65 thousandth of an inch
A string: 80 thousandth of an inch
E string: 105 thousandth of an inch

Theoretical math results:

G string: 34.045 inches from nut

including string compensation (45 thousandth of an inch)

D string: 34.110 inches from nut

including string compensation (45+65 thousandth of an inch)

A string: 34.190 inches from nut

including string compensation (45+65+80 thousandth of an inch)

E string: 34.295 inches from nut

including string compensation (45+65+80+105 thousandth of an inch)

Fuzzy math...
Not 100 percent sure it's computed the way they described.
Can you help?
Thanks.

Last edited: Mar 14, 2020
2. ### Bruce JohnsonCommercial User

Feb 4, 2011
Fillmore, CA
Professional Luthier
Your math is correct. For terminology, compensation is the amount that you have move the saddle back from the zero line, to get the intonation correct. In this case, the zero line is 34.0". The compensation is the amount beyond that, 0.045"-0.295".

Those numbers are a good general guideline for most basses. But the compensation you will need to get the intonation correct will depend on the gauge of the string, the type of string, and the action height.

When I design and build basses, I usually allow for up to 0.060" on the G and 0.375" on the E; 0.450" on a B.

Most commercial bridges have plenty of saddle travel, more than 0.750". To set the bridge position on the bass, move the saddles up near the front of their travel, and align the string contact point on the saddle at the zero line, in this case 34.0" from the nut.

Lownote38 likes this.
3. ### kalle74

Aug 27, 2004
Lime on white. Couldn't read it.

wcriley likes this.
4. ### Matt Liebenau

Jul 7, 2013
Ogden, Utah
What Bruce said. Those numbers are a “rough” intonation. Always set witness points and check with a tuner.

themarshall likes this.
5. ### James WillieSerious BusinessSupporting Member

Jul 29, 2016
Lake Texoma
Did not know.
The lime font color does not show well on light profiles.
My TalkBass profile is always set to dark mode.
James in Austin

6. ### James WillieSerious BusinessSupporting Member

Jul 29, 2016
Lake Texoma
The biggest fear sometimes is moving forward.
Just a hobby guy. Do not want to mess up.
Thanks
James in Austin

7. ### SlaterLeave that thing alone.

Apr 17, 2000
The Great Lakes State
NIDM;DR = Not In Dark Mode;Didn’t Read

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