[geoffretired]

I always thought that two identical limbs, topped off with two identical cams would would give fairly straight line nock travel. It seemed that way in the days of round wheels. Then I bought an Oneida Black Eagle. They have identical cams with identical limbs but the cams are operating the limb they are attached to not the opposite one as in conventional compounds. They have an added feature which is a timing system that keeps the top and bottom limbs working in synch with one another. When I saw the cam and a half system recently, it seems that the same idea is in use although it looks different. One cable seems to keep both cams in synch so they both rotate together all the way through the power stroke. The Oneida system is over 20 years old so they knew something then, or so it would seem, about wheels/cams working out of synch.
I am not talking about wheel timing as set by the relative cable lengths. I think this is to do with the cams moving together all the time, not letting one get in front for a while then trailing later in the power stroke. I wondered if anyone could throw light on this. I wondered if it was the parallel limbs that made it more likely for one cam to get infront then fall behind. Or is it just that we have better equipment these days to show how the wheels/cams tend to lead then trail. If that's the case, how did Oneida get to use their timing system so much earlier?
I'm puzzled.