Craftsman 315.212220 - Manual (Page 25)

OPERATION
CUTTING CROWN MOLDING
Your 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 com­
pound 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 32.
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.
When setting the bevel and miter angles for com­
pound miters, remember that the settings are interde­
pendent; changing one angle changes the other angle
as well.
Keep in mind that the angles for crown moldings 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.
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