cutting tenions with dado set
I am using knotty Alder 3/4" wood. My project calls for cutting several pieces with a grove 3/8 wide down both sides of each piece, in the middle of the edge which I have done without a problem. I am getting into trouble cutting a 3/8 tenion 1/4" long on the ends of each piece. The dado blade sometimes tears a chunck off the very edge of the wood as I finish the cut and this will show when I fit the piece into the grove of another piece. The finished product will be a frame with a panel in the middle.
I have tried a very slow cut but it doesn't prevent it. How can I prevent that tearout on the corner as I make the cut with a dado blade?
Hope my description makes sense.