Cutting Crown Molding - DeWalt DW713-XE Instruction Manual

OUTSIDE CORNER:
Left side
1. Position molding with bottom of the molding against the fence
2. Save right side of cut
Right side
1. Position molding with top of molding against the fence
2. Save right side of cut

CUTTING CROWN MOLDING

Your miter saw is better suited to the task of cutting crown molding than
any tool made. In order to fit properly, crown molding must be compound
mitered with extreme accuracy.
The two flat surfaces on a given piece of crown molding are at angles
that, when added together, equal exactly 90°. Most, but not all, crown
molding has a top rear angle (the section that fits flat against the ceiling)
of 52° and a bottom rear angle (the part that fits flat against the wall)
of 38°.
Your miter saw has special pre-set miter detent points at 31.62° left and
right for cutting crown molding at the proper angle (Fig. 27). There is also
a mark on the Bevel scale at 33.85°.
The chart below gives the proper settings for cutting crown molding. (The
numbers for the miter and bevel settings are very precise and are not easy
to accurately set on your saw.) Since most rooms do not have angles of
precisely 90°, you will have to fine tune your settings anyway.
PRETESTING WITH SCRAP MATERIAL IS
EX TREME LY IMPORTANT!
FOR CUTTING CROWN MOLDING LAYING FLAT AND USING THE
COMPOUND FEATURES
1. Move the left side fence out of the path of the blade before attempting
any of the following cuts.
2. Molding laying with broad back surface down flat on saw table
(Fig. 29).
3. The settings below are for all Standard (U.S.) crown molding with 52°
and 38° angles.
BEVEL SETTING TYPE OF CUT
LEFT SIDE, INSIDE CORNER:
33.85° 1. Top of molding against fence
2. Miter table set right 31.62°
3. Save left end of cut
RIGHT SIDE, INSIDE CORNER:
33.85° 1. Bottom of molding against fence
2. Miter table set left 31.62°
3. Save left end of cut
LEFT SIDE, OUTSIDE CORNER:
33.85° 1. Bottom of molding against fence
2. Miter table set left 31.62°
3. Save right end of cut
RIGHT SIDE, OUTSIDE CORNER:
33.85° 1. Top of molding against fence
2. Miter table set right 31.62°
3. Save right end of cut
When setting bevel and miter angles for all compound miters, remember
that:
FIG. 29
FENCE
CROWN MOLDING FLAT ON TABLE AND AGAINST FENCE
FIG. 30
BOTTOM SIDE OF
MOLDING
TOP SIDE
OF MOLDING
FENCE
CROWN MOLDING BETWEEN FENCE AND TABLE
The angles presented for crown moldings are very precise and difficult
to set exactly. Since they can easily shift slightly and very few rooms
have exactly square corners, all settings should be tested on scrap
molding.
PRETESTING WITH SCRAP MATERIAL IS
EXTREME LY IMPORTANT!
ALTERNATIVE METHOD FOR CUTTING CROWN MOLDING
Place the molding on the table at an angle between the fence and the saw
table, as shown in Figure 30. Use of the crown molding fence accessory
(DW7084) is highly recommended because of its degree of accuracy and
convenience. The crown molding fence accessory is available at extra cost
from your local dealer.
The advantage to cutting crown molding using this method is that no
bevel cut is required. Minute changes in the miter angle can be made
without affecting the bevel angle. This way, when corners other than 90°
are encountered, the saw can be quickly and easily adjusted for them. Use
the crown molding fence accessory (DW7084) to maintain the angle at
which the molding will be on the wall.
12
FIG. 31
TABLE
FENCE
FIG. 32
DW 7084 CROWN
MOLDING FENCE
TABLE
FENCE
INSTRUCTIONS FOR CUTTING CROWN MOLDING ANGLED BETWEEN
THE FENCE AND BASE OF THE SAW FOR ALL CUTS:
1. Angle the molding so the bottom of the molding (part which goes
against the wall when installed) is against the fence and the top of the
molding is resting on the base of the saw, as shown in Figure 30.
2. The angled "flats" on the back of the molding must rest squarely on
the fence and base of the saw.
INSIDE CORNER:
Left side
1. Miter right at 45°
2. Save the right side of cut
Right side
1. Miter left at 45°
2. Save left side of cut
OUTSIDE CORNER:
Left side
1. Miter left at 45°
2. Save right side of cut
BLADE
RIGHT
BLADE
WRONG