NON-PBG - LP Build Diary for DIY Guitars GLP-40BBK

[wazkelly]

Hey mate, before cutting things or spending any money maybe just remove the bridge and run the long rule all the way to see how things are. Even with the bridge in place you should still be able to place it at a slight diagonal angle for the whole length.

Another idea is to do the capo at 1st fret and with strings at proper pitch draw the low E down at 12th and again at last fret which should be 22nd on a LP. Check how much gap is under the string from each of those reference points back to the capo'd spot. If all of this reveals a dead flat deck the problem will be elsewhere.

[Alkay]

Hey mate, before cutting things or spending any money maybe just remove the bridge and run the long rule all the way to see how things are. Even with the bridge in place you should still be able to place it at a slight diagonal angle for the whole length.

Hi wazelly,

I used your first option above to check how straight the neck is with my 600mm metal ruler positioned in the center of the fret board:

- There are no gaps between frets 1 to 8.

- Fret 9 there is a tiny gap and this increases up to fret 22 where the gap was about 1.5mm high

I have researched this allot so please correct me if I am wrong:

- A rocking motion on the neck is caused by "back bow" and this IS currently what is going on with my neck.

- If I had the opposite, which I don't. But if I did there would be gaps between the straight edge and middle sections of the fretboard caused by "front bow".

Therefore to fix my back bow issue I need to do the following:

- Looking directly at the truss rod hex screw near the headstock, turn the truss rod to the right(clockwise) 1/4 of a turn.

- The gap between the straight edge and the 22nd fret should be decreased.

- Repeat this until there are no more gaps or rocking motion over the frets.

I hope I have explained that well enough and if I have anything wrong please let me know.

Cheers,

Alkay.