Craftsman 315.BT2010 Operator's Manual page 24

CUTTING CROWN MOLDING
This compound miter saw does an excellent job of cutting
crown molding. In general, compound miter saws do a
better job of cutting crown molding than any other tool
made.
In order to fit properly, crown molding must be compound
mitered with extreme accuracy.
The two contact surfaces on a piece of crown molding
that fit flat against the ceiling and the wall of a room are at
angles that, when added together, equal exactly 90°. Most
crown molding has a top rear angle (the section that fits
flat against the ceiling) of 52° and a bottom rear angle (the
section that fits flat against the wall) of 38°.
LAYING MOLDING FLAT ON THE MITER TABLE
See Figure 29.
To use this method for accurately cutting crown molding
for a 90° inside or outside corner, lay the molding with its
broad back surface flat on the miter table and against the
fence.
52
°
CEILING
38
°
W
A
L
L FENCE
TOP EDGE AGAINST FENCE =
OPERATION
LEFT SIDE, INSIDE CORNER
RIGHT SIDE, OUTSIDE CORNER
MITER TABLE
CROWN MOLDING FLAT ON MITER TABLE
When setting the bevel and miter angles for compound
miters, remember that the settings are interdependent;
changing one angle changes the other angle as well.
Keep in mind that the angles for crown molding are very
precise and difficult to set. Since it is very easy for these
angles to shift, all settings should first be tested on scrap
molding. Also most walls do not have angles of exactly
90°, therefore, you will need to fine tune your settings.
When cutting crown molding by this method the bevel
angle should be set at 33.85°
set at 31.62° either right or left, depending on the desired
cut for the application. See the chart for correct angle
settings and correct positioning of crown molding on miter
table.
The settings in the chart can be used for cutting all Stan-
dard (U.S.) crown molding with 52° and 38° angles. The
crown molding is placed flat on the miter table using the
compound features of the miter saw.
INSIDE
CORNER
FENCE
24 — English
The miter angle should be
.
OUTSIDE
CORNER
BOTTOM EDGE AGAINST FENCE =
RIGHT SIDE, INSIDE CORNER
LEFT SIDE, OUTSIDE CORNER
MITER TABLE
Fig. 29