| Truss rod: Adjusts the tension of the rod built-in to the neck. This sets the amount of "relief" or curvature of the neck. This rod counteracts the tension that the strings pull on the neck. This is not really meant for adjusting string-height or action, but will have a pronounced effect on it. Read the stickys posted at the top of this page. It'll start to make sense.
Tilt adjustment: You can use this to tilt the higher frets closer to the strings. When you know the truss/relief is set correctly, you have a good action at the low frets, but action is too high at the upper frets, this comes in handy.
Please keep in mind that you'll want to loosen string tension and usually all 4 neck bolts a bit before you tighten/loosen this adjustment. Then make sure all bolts are tight before retuning the bass back to pitch.
Saddles: This sets the overall height of the strings, and they can be adjusted individually per each string. They also have an adjustment to lengthen or shorten the string's scale to set "intonation"..
So if I had all 3 and wanted to set up that bass I'd:
1. Tune the bass to the pitch I intend to use.
2. Adjust the truss to give the neck the right amount of relief (string height doesn't matter yet).
3. Adjust string height with the saddles. Check action at low and upper frets.
4. If action at the high frets is uncomfortably high, I'd use the micro-tilt adjustment to fine adjust this.
5. Fine tune pickup height to compensate for any string height changes.
Note: Keep in mind that while doing this, you'll need to retune the bass between every step. Even small tune changes will change the feel and action of the neck.
Good luck...
Mag... |