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Truss rod turning frequency: such a thing as too often?

Hi,

I purchased a EBMM USA SUB Stingray about a month ago, and although I adore its sound, after playing with it past the initial honeymoon stages I've noticed this thing has come with its own plethora of set-up quirks.

The most obvious is that the neck seems to move far more often than any other basses I've ever own. I will come home from work one day and find the action ever so slightly higher than I initially had it set. Mind you, the difference is arguably incredibly minute, but its apparent enough for me to want to give the truss rod a slight 1/8th of a turn to appease the change in string height.

For clarity, I personally like a pretty low action, and thus my necks tend to be pretty darn straight with only a smidge of relief.

Again, I want to stress I'm very barely adjusting it, and I've set up many basses myself before so I know I'm not killing the neck via giving it a backbow or whatnot. Its not the amount of turning I'm doing that I'm concerned about, but the frequency of me doing it, as I will get to here.

Recently, living in the progressively warmer, humid, summers of Iowa, this has become more of a bi-weekly thing I've noticed. Previously any other bass I've own (none of which were Ernie balls, so I'm unsure if this is just the nature of these instruments) I've had to adjust the action at most perhaps one every 3 to 4 months.

For more factors, EBMM Sub basses (such as mine) most came in jet matte black bodies, and came with painted black(as opposed to natural finished) necks and headstocks as well. My gut tells me the amount of black perhaps causes it to attract more heat and humidity somehow? But again, this is just me being unsure and mulling over possible things.

Another factor worth mentioning is that I also do have this bass strung with some higher tension flatwounds.

Ultimately my question is this issue I'm noticing worth worrying about? Or is it one of the quirks I kinda just have to deal with and adjust to as needed?

For further clarification, I've had this bass dropped off at a tech before to do a little setup, cleaning and fret leveling, and I heard nothing out of the ordinary wrong with the bass when I got it back.
 
I have a lefty Sire (I forget which model, but it's a J-style maple-neck) which has a very similar issue. You will find some threads that I started on this in the archives. Basically it feels like the truss-rod is constantly "slipping".

I've had it for a couple of years now, and I've come up with a bunch of theories as to why this is happening:
  • That the wood is soft
  • That the truss-rod nut is actually slipping
  • That I'm just imagining this (I doubt that's the case, but I haven't been measuring)
I think, but have no way of proving, that it's the wood. I also found out that it does "stabilize" a couple of weeks after each setup, and then it's fine until the next season or string-set change.

I kinda like the bass, and I've come to accept it as it is. Still, if I had a show or anything important (not that this happens much) - I probably wouldn't count on this one, unless it's been setup a while ago and had time to stabilize.

I can speculate, but probably won't actually try this, that flexing the neck a bit back and forth would help shorten the "stabilization period".

I doubt the color matters, unless you put the bass in direct sunlight for long periods.
 
Is it a brand new bass? If so, it could take the neck a while to “stabilize” and stay where it’s put after a setup. I’ve read even up to a year or two for things to settle down, so to speak.

Another question, are you always adjusting the truss rod the same direction? E.g. always tightening or is it sometimes tighten sometimes loosen?
 
If I read you correctly you are always tightening the truss rod. That suggests that the neck wood is not stiff enough for the tension of the strings that are on it. However since you have had it for only a month it may just be settling in. If it continues to require frequent tightening of the truss rod over the next month I would try strings with less tension. If you find you are having to tighten it one day and loosen it a few days later you have a neck that is very reactive to climate change. Some are.

The colour of the neck has no relevance.
 
Thanks for the input guys. I think I ultimately just have a bass with a rather temperamental neck.

I do recall during the last few days in winter right before it started to get hot here (roughly late May) Iowa that there were some colder nights, and I did have to loosen the truss rod one night because the strings got low enough to start buzzing.

So that ultimately answers the question. I hope that's just it.

I feel though if it were a truss rod issue I would notice it more though. As I stressed before my adjusting with the truss rod is very minute and more so because I'm so picky with my action.
 
A friend of my fathers had a racing sailboat for a while. The mast was held in place by stainless cables with turnbuckle adjustment. He kept "tuning" the cables, always tighter, until the tension drove the mast right through the hull. Ouch. Dont be that guy, broken trussrods suck. For the record, ive never had a bass that had to be adjusted more than two or three times a year, and that was my Ric 4001 with "scary thin" neck. if you really want a neck that will stay put, get something carbon/graphite like a Status or Modulus. My Steinberger neck just doesnt move, ever. Wood is lovely to look at and touch, but not the best available material for a bass neck.
 
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Everybody has a different climate to deal with as you move around the USA. The humidity that we have to endure in the central and Eastern states would floor most Californians. I think you have to allow the bass to equalize to the heavy strings, increased humidity, and other factors to your locality. Although I would've thought that higher humidity would cause you to loosen your truss rod because as the neck absorbs moisture its actually getting longer and you will see a back blow as the rod increases its pressure. You may have an air conditioned space that makes the humidity less important than you think.
I would also ask you if you keep your bass in a case or out in the open when you are not playing? Cases can do a lot of mitigation when severe climate is a factor.

To answer your question: If you are only turning the rod nut and eighth of a turn every couple of weeks, i don't think that is anything to worry about but I would look at other factors like the strings and make a judgement if you don't feel good about the frequent adjustments, maybe those heavy strings should go on a different bass.
 
I have a lefty Sire (I forget which model, but it's a J-style maple-neck) which has a very similar issue. You will find some threads that I started on this in the archives. Basically it feels like the truss-rod is constantly "slipping".

I've had it for a couple of years now, and I've come up with a bunch of theories as to why this is happening:
  • That the wood is soft
  • That the truss-rod nut is actually slipping
  • That I'm just imagining this (I doubt that's the case, but I haven't been measuring)
I think, but have no way of proving, that it's the wood. I also found out that it does "stabilize" a couple of weeks after each setup, and then it's fine until the next season or string-set change.

I kinda like the bass, and I've come to accept it as it is. Still, if I had a show or anything important (not that this happens much) - I probably wouldn't count on this one, unless it's been setup a while ago and had time to stabilize.

I can speculate, but probably won't actually try this, that flexing the neck a bit back and forth would help shorten the "stabilization period".

I doubt the color matters, unless you put the bass in direct sunlight for long periods.

Your bass neck is haunted! try marking the nut with a "magic" marker to check if it's moving/slipping (never heard of that, though). it's probably the neck wood being too sensitive.
say a couple of hail marys or whack it with a bible after the next adjustment!:D
 
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