Why would raising the saw blade change the accuracy?
When I cross cut a 7″ pine board and measure it for square, I find the edge farthest from the miter gauge fence is .015″ off, about 1/64″. So it really about 89.85 degrees.
I’ve tuned the saw, the blade a Forest WW II, has minimal runout as did the arbor and flange. I aligned the blade to within .002″ of the miter slot.
I then set the miter gauge to square with the blade, using a architectural drafting sqaure. When I cut, with the gullets of the blade just above the surface of the wood, the cut is off by 1/64″.
However, if I raise the blade all the way and cut again, the cut is dead on. Why would this happen?