Proctologically Violated©® wrote:
Awl--

My compadre's new-er Kalamazoo horz'l band saw (I got the old one) is
dishing--ie, the mat'l in the vise, after a cut, has a low point in the
middle. On 3" diam alum, about .030; the bigger the diameter of the piece,
the more the dish.
What could be causing this? Aside from the dishing, the pieces are square,
the blade is tight (1", .030), he says the feed/speeds are right (proly
conservative), teeth count OK, plenty of coolant..

It has to be the actual hinge mechanism being worn, seems to me. If it were my
problem to diagnose, I'd start with a square piece and catch it in the vise so
the square end is just against the blade, then carefully and slowly raise and
lower the blade to see if the blade wanders without any load, saw turned off. If
it does, then for sure it's the hinge ears. If not, then it may be some strange
blade issue, and I think the second thing I'd do is to first carefully check the
guide adjustment and blade tension and see if that helped, and failing that I
think I'd try a new blade.

GWE