Garnet70

The video where he uses the bench grinder and the stone together really makes it clear how they work together. The bench provides the concave curve that provides just a small beveled edge that can be sharpened quickly with the stone. Then, over time, as that edge wears down, the user has a tendency to cut a deeper and deeper secondary bevel at the edge as the concave edge becomes flattened and then, effectively convex, bringing us back to the point where we re-curve the center of the edge again on the bench grinder. I get it now! Since Gary emphasized its importance, I would like to learn more about the type of wheel and how it was dressed.