Neck too straight, can get no relief

[hydra19]

I have a bit of a problem recently...I have a Superstrat, M-II by ESP, when I bought it, it came setup from the factory with 10 gauge strings, and all was fine. Eventually I put DR String 50-10 set, essentially a 10-48 set, with the treble strings a lighter gauge, and had it like that for a year or so. I recently put 9-46 set on it and now the neck is very flat, no relief at all. I tried moving the truss rod to the left a bit, but it was still straight, so I was doing that for a few days until the truss rod nut slipped off, it's that loose, and there is hardly any relief.
This guitar never needed a setup before, and needed none with the different gauges I've tried but now, no matter what, the neck is really straight and I doubt the strings have so little tension. What should I do? Try a different set of strings? Leave it without truss rod nut until the neck gets some relief? I never had this situation before

 

[Boreas]

I have a bit of a problem recently...I have a Superstrat, M-II by ESP, when I bought it, it came setup from the factory with 10 gauge strings, and all was fine. Eventually I put DR String 50-10 set, essentially a 10-48 set, with the treble strings a lighter gauge, and had it like that for a year or so. I recently put 9-46 set on it and now the neck is very flat, no relief at all. I tried moving the truss rod to the left a bit, but it was still straight, so I was doing that for a few days until the truss rod nut slipped off, it's that loose, and there is hardly any relief.
This guitar never needed a setup before, and needed none with the different gauges I've tried but now, no matter what, the neck is really straight and I doubt the strings have so little tension. What should I do? Try a different set of strings? Leave it without truss rod nut until the neck gets some relief? I never had this situation before

Is there no measureable relief? Backbow? Sometimes they need a little help. First ensure proper humidification and you can try leaving it unstrung for a while to see what happens, but it sounds like you may need to clamp it or use some weight to get it to sag a little. I would use heat and a bowling ball only as a last resort...

 

[msalama]

Hmmm... leave the truss rod loose, string up with 11s, tune to concert pitch, leave for a couple of days and check again?

 

[VintageSG]

Fit a set of 10-48 and tune -up- a step. leave it for a while.
Support the headstock and body on a pair of books. Tune up, put a kilo or two around the 9th fret region to get a little weight on it. Don't stand on it. That'd end badly. Start with a kilo, leave it over night. Check, repeat.
When some relief becomes apparent, string/tune normally and snug the truss rod back up.

You haven't been leaving it near a radiator have you?

 

[darkwaters]

I owned a Squier Custom II and also worked on one that belonged to a friend; both had the identical problem: necks dead straight and no way to attain any relief. My solution was to string them with 11s. At least it meant I could set them with a nice low action.

 

[Gris]

Sounds like a tune played with a fuzz pedal

 

[KokoTele]

The combination of lowest action and least buzzing happens when your neck is flat, without relief. As long as there's no backbow, I wouldn't worry about this neck at all.

If it's buzzing, you likely have high or low spots. Necks start to undulate a bit over time.

 

[kinkstah]

The combination of lowest action and least buzzing happens when your neck is flat, without relief. As long as there's no backbow, I wouldn't worry about this neck at all.

+ 1,000