It is totally unrealistic to expect to get that degree of accuracy from a bandsaw. Look to your table saw and router table for this type of result.
Denis Lock - Routing with Denis - Home
I'm not trying to be a SnER A, but I do think that it is extremely realistic to want to have the accuracy that I have asked about, and is a very realistic expectation, or at least a wish, otherwise I would not have asked, however, I do agree and understand that what you and Mike have said that attaining that level of accuracy is indeed unrealistic the for reasons described.
How ever, if one were to make several cuts with the fence in the same position to see what the variation in the cuts is due to the way a band saw blade is deflected, then have an adjustment that would work within that the range of the variation seems to me to be practical. For example, let's suppose that after making several cuts that it is determined that the variation is .050". I don't know what the variation is right now as I have done the test. But I'm thinking is that it would be nice to be able to set the fence so that a person would know that the cut would be within those tolerances with the first cut..
I have not, for some reason, attempted to use the scale on the saw. Part of the reason for this is that with the re-saw fence installed the scale cannot be zeroed and one would have to deal with the off set error all of the time or remove the re-saw fence. I need to do some checking on the accuracy of that scale.
In my own defense, I do believe that asking questions and digesting the answers to the questions leads to one's knowledge and one's approach to dealing with issues and being able to wring out, in this case the BS, the very most that one can get from a machine.
To just say "hey bud what you are asking is unreasonable" while true, just challenges me to do reseach on the matter and see what is possible and to be able to work within the limits of the BS.
Recently I logged off of the forum and was asked why by one of the monerators why I had done so. My answer was that I felt that that I was asking to many dumb questions but after some re-thinking of the issue and missing reading the theads and posts, I have come back on and will just coniue to ask my question which do often make me look some what ignorance which I certainly am, but ignorance is the same as stupid of course and I have to keep reminding myself of that.
I do appreciate the posts to my questions, that's what makes the forum so great.