Originally Posted by
Bruce Wrenn
Yeah, but it's easy to do with just a piece of BB plywood. This method was stolen from John White's book "Care and Repair of Shop Machines." Take a piece of 1/2" BB plywood, about 2 inches wide, and ten inches long. Then mark a center line down it's length. Near one end on the center line, bore a hole to match the arbor on your saw. Mount on saw arbor, then in the forward position, mark a spot where your dial indicator (mounted in miter slot) touches it. Then rotate to rear, and check DI against same spot. Once you get this spot "zeroed in," reset plywood to another location, and check again. It should remain the same as before, unless you have arbor run out. You can set arbor for 45 degree bevel,and raise it up, to upper most position, and rest DI tip on flange washer to check run out.