Anyone who has attempted to make picture frames with a radialarm saw knows how difficult and frustrating it is to set the arm to a perfect 45¡ angle. I developed a technique that allows you to produce perfect miters by canceling out error in the saw-arm setting. Start by swinging the arm to 45¡, as determined by the built-in stop, and locking the arm in place. Now clamp an auxiliary fence to the table at a right angle to the main fence, as shown in the sketch. I use a Masonite scrap with a straight factory edge for the auxiliary fence and align it with a large framing square. Working with a long piece of molding stock, start the framecutting sequence by holding the outer edge of the molding against the auxiliary fence and trimming its end to a 45¡ angle. Next, hold the molding’s inside edge against the saw’s main fence and cut the first frame section to length. Now repeat this sequence; first trim the molding to 45¡ on the auxiliary fence and then move it to the main fence for the second 45¡ cut. The auxiliary fence is used only for trim cuts on the end of…
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