Black & Decker 3680 用户手册

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1. Molding laying with broad back surface down flat on saw table (See Figure 24).
2. The settings below are for all standard U.S. crown molding with 52˚ and 38˚ angles.

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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 com-
pound 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.

PRETESTING WITH SCRAP
MATERIAL IS EXTREMELY
IMPORTANT!

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 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 preset miter latch points at 31.62˚ left and right for cutting crown molding
at the proper angle. There is also a mark on the bevel scale at 33.85˚.

The chart on the next page 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 EXTREMELY IMPORTANT!

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Place the molding on the table at an angle between the fence and the saw table, as shown in Figure
25.Use of the crown molding fence accessory 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 or B&D service center.

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 36807 crown molding fence accessory to maintain the angle at which the molding will be
on the wall. Place the bottom side (the side that will be against the wall) against the miter saw fence.

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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 25.

2. The angled “flats” on the back of the molding must rest squarely on the fence and base of the saw.

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FENCE

TABLE

CROWN MOLDING FLAT ON TABLE
AND AGAINST FENCE

CROWN MOLDING FENCE AND
TABLE

CROWN
MOLDING
FENCE

TOP SIDE OF
MOLDING

BOTTOM SIDE OF
MOLDING

TABLE