DeWalt DHS790 Manual page 16

English
Fig. CC
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.
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 (Fig. DD)
1. Molding should lay flat with broad back surface down on saw table.
2. Top of molding against fence.
3. The settings below are for all standard (U.S.) crown molding with 52° and 38° angles.
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
When setting bevel and miter angles for all compound miters, remember that:
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.
14
OUTSIDE CORNER
Miter right 45°
Save left side of cut
Miter left 45°
Save right side of cut
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. DD
Crown molding flat on table and against fence
PRETESTING WITH SCRAP MATERIAL IS EXTREMELY IMPORTANT!
Alternative Method for Cutting Crown Molding (Fig. EE)
Place the molding on the table at an angle between the fence and the saw table, as shown in
Figure EE. Use of the crown molding fence accessory (DW7084) is highly recommended because
of its degree of accuracy and convenience (Refer to Optional Accessories). 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
installed) is against the fence and the top of the molding is resting on the saw table, as
shown in Figure EE.
2. The angled "flats" on the back of the molding must rest squarely on the fence and saw table.
INSIDE CORNER
Miter right at 45°
Left side
Save right side of cut
Miter left at 45°
Right side
Save left side of cut
Fig. EE
Fence
Crown Molding Between Fence and Table
Special Cuts
NEVER MAKE ANY CUT UNLESS THE MATERIAL IS SECURED ON THE TABLE AND AGAINST
THE FENCE.
Aluminum Cutting (Fig. FF, GG)
ALWAYS USE THE APPROPRIATE SAW BLADE MADE ESPECIALLY FOR CUTTING ALUMINUM. These
are available at your local D WALT retailer or D
e
their size, shape or surface finish, may require the use of a clamp or fixture to prevent movement
during the cut. Position the material so that you will be cutting the thinnest cross section, as
shown in Figure FF. Figure GG illustrates the wrong way to cut these extrusions.
Use a stick wax cutting lubricant when cutting aluminum. Apply the stick wax cutting lubricant
directly to the saw blade before cutting. Never apply stick wax to a moving blade. The wax,
available at most hardware stores and industrial mill supply houses, provides proper lubrication
and keeps chips from adhering to the blade.
Be sure to properly secure workpiece.
Refer to saw Blades under Optional Accessories for correct saw blade.
Fence
Table
OUTSIDE CORNER
Miter left at 45°
Save right side of cut
Miter right at 45°
Save left side of cut
Bottom side
DW7084 Crown
of molding
Molding Fence
Top side
of molding
Table
WALT service center. Certain workpieces, due to
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