Wheel building theory problem
Hi Everyone
I am building my first right now and have a cognitive gap Im hoping you can help close. I have read Jobsts book and browsed some of sheldons writing on wheel building and I understand that the three goals of wheel building are true, roundness, and tension. From the reading I have done, it sounds like Jobst' approach assumes that the wheel be built without the aid of a tensiometer, and so there is an interative process to slowly bring all three factors into line over the course of the build. I undertook my wheelbuilding with the use of a tensiometer, so I was able to tension my spokes equally within the accuracy of the gauge (I am using the Park Tools meter.) Now when I finally had all my spokes at the correct tension, I looked again at the wheel to see that it was neither true nor round. So now I am in the situation where I must sacrifice even tension to improve true and round. So from this perspective it looks like you can not have all three exactly correct. I suppose this has much to do with the initial shape of the rim you are building up. In my case I went a little fancy for my first wheel and chose an Araya 16b Gold tubular rim, that I would expect to have a very good initial shape (though I failed to test this before building the wheels.)
Is there some flaw in my reasoning, and now what would be the next step and what should my end conditions be? Do I sacrifice tension for true? These are track wheels to be ridden without brakes so the braking surface need not be great, but I cant imagine an untrue wheel being a great conclusion for this fancy build.
Thanks
Alex
ps. I'm sure this has been mentioned on this forum before, but the sheer volume of wheelbuilding threads makes it difficult to find it so I am asking again. Thanks for your patience.