Now this is where it gets a little tricky.
Joint "B" is an outside corner, vertical turn. (The crown turns up and continues on to joint "C".)
note, in this photo: The right end of the crown is the good piece. This is the short piece that goes from joint "A" to joint "B". (I am now cutting the left-hand side of joint "B")
Use your True Angle® Tool and measure the angle between the wall and the ceiling, then add 90 degrees to it to get the actual corner angle for joint "B". (i.e. Our example is a 20-degree sloped
ceiling; therefore, the angle between the wall and the ceiling is 110 degrees. The corner angle for joint "B" is 110+90=200 deg.)
The bottom of the crown is next to the fence and the top will be cut so it is
0 inches long (makes a point). Again, it is very important to use your crown molding templates to make sure you are cutting the correct type of cut.
Using 200 deg. as the corner angle and a vertical turn crown slope angle of 38 deg. you can obtain the miter and blade tilt from the Compound Miter Chart, Crown
Molding Table or the Compound Miter Excel Program. (When you are turning the crown molding up or down,
the crown slope angle is always equal to the crown spring angle.