How To Cut Crown Molding Video
Crown molding is not installed flat against the ceiling or the wall. Crown molding is installed at an angle. Unlike base board or door or window casing which are held flat in the miter saw, crown molding is held upside down. The shoulder and the foot must be flat against the saw's fence and the saw table.
Crown molding cutting is a piece of cake if the workpiece is held properly in the power saw. Try it, it will work for you.