|Tapered French Dovetail|
Tapering the routed slot is fairly easy. Make a straight slot against a straight edge first. Then move the leading end of the straight edge over 1/16" or so. Make note of how far you moved it. A penny (1 cent) measures almost 1/16" thick (.06" rather than .0625"). I usually moved the straight edge end 1/16".
To taper the male dovetail end a shim as thick as the amount the straight edge was moved is needed. I tape a penny (tape + penny=1/16") or laminate sample chip to one edge of the mating piece just above the height of the dovetail bit. As the board slides past the router bit that shim holds one end away from the bit 1/16" to effectively taper that cut. The other side is cut parallel to the face. Care needs to be taken to match the side of the tapered slot to the tapered side of the joining piece. Cut on the wrong side the joint will still slide together, but be slightly crooked when in place.
|CNC cut Dovetailed Side|
|CNC cut Tapered Slot|
|Vector for Tapered Dovetail Slot (blue)|
|Vector for Male Dovetail End|
|Almost together. Still loose.|
|Snug and Tight when completely together.|
Comments and questions I encourage and welcome.