Section 5
– Setting Up Your Guitar
BONGO bass Section 5
- 2 -
5.1
Adjust the Guitar Neck: Truss Rod
The first major procedure in the setup is adjusting the neck relief. Neck relief simply refers to how much
the neck bows. The degree of bowing in the neck is a matter of personal preference and is correlated to
your playing style.
5.1.1
Check the Neck
Get a ruler or straightedge that is at least as
long as the neck, but not so long that it
reaches all the way from the nut to the
saddles. If you can’t get one between these
lengths, and are willing to sacrifice a ruler, get
one that’s too long and cut it to length.
Alternatively, you can just cut a little out of
one edge so that you can still make full use of the other edge of the ruler. Now lay the edge of the ruler
along the frets (don’t rest it on top of the nut, saddles, pickups or pickup surrounds).
Using a feeler gauge or high resolution metal ruler, measure the string height (the gap between the
ruler/string and the top of the fret) at about the 8th fret. The string height should be approximately 1/8’
(0.012”) - simply slide the feeler gauge into the gap to see if it is too big/small.
5.1.2
Adjusting the Truss Rod
Tightening the truss rod adjustment bolt will cause the neck to warp backward (too much and the
strings will buzz on the frets), and loosening it will cause it to bow forward (giving more relief.).
CAUTION: If you find that the truss rod is very difficult to turn, then stop. It may be that there is a
problem with the neck or the truss rod and you may damage the guitar by forcing it.
Sight down the edge of the fingerboard from
behind the headstock, looking toward the body
of the guitar.
1.
If the neck is too concave (action too
high), turn the truss rod nut clockwise to
remove excess relief (only adjust ¼ turn
at a time).
2.
If the neck is too convex (strings too close to the fingerboard), turn the truss rod nut counter-
clockwise to allow the string tension to pull more relief into the neck.
3.
Check the tuning, then re-check the gap with the feeler gauge and re-adjust as needed.
5.2
String Lubrication
Lubricate the contact points of a string's travel to ensure tuning stability and reduce string breakage.
Lubricate:
1.
string/saddle contact points with a light machine oil (…such as 3-in-1 oil because it contains
anti-rust and anti-corrosive properties) every time you change strings.
reference:
…check out the following
references for adjusting the Truss rod:
http://www.youtube.com/watch?v=PHHepmTX3So
http://www.youtube.com/watch?v=4j3QryKIXrc
)
TIP…
do the neck adjustment in a series of
intermediate steps and re-tune your guitar before each
step – different tension on the strings changes the
adjustment of the neck