Cutting Crown Molding - DeWalt DWS780 Guide D'utilisation

CUTTING BASE MOLDING FROM 3" UP TO 6.75" (76 mm to 171 mm) HIGH
VERTICALLY AGAINST THE FENCE
NOTE: Use the slide lock lever, shown in Figure 7, when cutting base molding measuring from
3" to 6.75" (76 mm to 171 mm) high vertically against the fence.
Position material as shown in Figure 16.
All cuts should be made with the back of the molding against the fence and with the bottom
of the molding against the table.
INSIDE CORNER
Miter left 45°
Left side
Save left side of cut
Miter right 45°
Right side
Save right side of cut
Material up to 6.75" (171 mm) can be cut as described above.
FIG. 16

Cutting Crown Molding

Your miter saw is well suited to the task of cutting crown molding. 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 90º. Most, but not all, crown molding has a top rear angle (the section
that fits flat against the ceiling) of 52º and a bottom rear angle (the part that fits flat against
the wall) of 38º.
Your miter saw has special pre-set miter latch points at 31.62º left and right for cutting crown
molding at the proper angle and bevel stop pawls at 33.9º left and right. There is also a mark
on the bevel scale at 33.9º.
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 90º, you will have to fine tune your
settings anyway.
PRETESTING WITH SCRAP MATERIAL IS EXTREMELY IMPORTANT!
INSTRUCTIONS FOR CUTTING CROWN MOLDING LAYING FLAT AND USING THE
COMPOUND FEATURES
1. Molding should lay flat with broad back surface down on saw table (Fig. 17).
2. Top of molding against fence.
3. The settings below are for all standard (U.S.) crown molding with 52° and 38° angles.
OUTSIDE CORNER
Miter right 45°
Save left side of cut
Miter left 45°
Save right side of cut
When setting bevel and miter angles for all compound miters, remember that:
FIG. 17
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 18. Use of the crown molding fence accessory (DW7084) is highly recommended
because of its degree of accuracy and convenience (Fig. 1). The crown molding fence
accessory is available for purchase 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 90º are encountered, the saw can be quickly and easily adjusted
for them. Use the crown molding fence accessory to maintain the angle at which the molding
will be on the wall.
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
2. The angled "flats" on the back of the molding must rest squarely on the fence and saw
12
INSIDE CORNER
Bevel left 33.9°
Left side Miter table set at right 31.62°
Save left end of cut
Bevel right 33.9°
Right side Miter table set at left 31.62°
Save right end of cut
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.
FENCE
TABLE
CROWN MOLDING FLAT ON TABLE
AND AGAINST FENCE
PRETESTING WITH SCRAP MATERIAL IS EXTREMELY IMPORTANT!
installed) is against the fence and the top of the molding is resting on the saw table, as
shown in Figure 18.
table.
OUTSIDE CORNER
Bevel right 33.9°
Miter table set at left 31.62°
Save left end of cut
Bevel left 33.9°
Miter table set at right 31.62°
Save right end of cut
FIG. 18
DW7084
CROWN
BOTTOM SIDE
MOLDING
OF MOLDING
FENCE
TOP SIDE
OF MOLDING
TABLE
FENCE
CROWN MOLDING BETWEEN
FENCE AND TABLE