Join Date: Sep 2012
Location: Wilkes-Barre, PA
Dude just get a small machinist's square. Lay it down flat on the table of your miter saw with one leg against the fence. With the saw head down, check to be sure that when set at 0 the blade is square to the fence. If not, make it square and adjust the miter gauge to 0.
Next check that the blade is square to the table when the bevel setting is at 0. This one is usually the culprit in an out of square miter. If you're beveling the saw to 45 degrees, be sure to check it again for square (to the fence) before you cut. They're not always reliable.
I always make sure to get the surface of the square up against the side of the blade and not on the teeth, it's easier to square up that way.
If your saw's dialed in properly it makes cutting perfect miters WAY simpler.
By the way Lateralus is hands down my favorite TooL album