Academy Notes -- Step FIVE

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STEP 5:
Change your dado blade set-up from a 1/2-inch depth-of-cut to a 1/4-inch depth-of-cut. Adjust your rip fence to form a tenon that’s exactly 1/2-inch long from the end to the “cheek”.
 
NOTE: The “Formula” for setting the blade height is as follows:  Subtract the thickness of the tenon from the thickness of your board and divide by two.