KNOVA KN M-2508RC Manual page 19

OPERATION
CUTTING BASE MOLDING (FIG. DD)
Base moldings and many other moldings can be cut on a com-
pound miter saw. The setup of the saw depends on molding
characteristics and application, as shown.
Perform practice cuts on scrap material to achieve best results:
1. Always make sure moldings rest firmly against fence and
table. Use hold-down or C-clamps, whenever possible, and
place tape on the area being clamped to avoid marks.
2. Reduce splintering by taping the cut area prior to making
cut. Mark cut line directly on the tape.
3. Splintering typically happens due to wrong blade
application and thinness of the material.
Fig. DD
F
e
Workpiece
n
c
e
Miter Saw Table
miter at 45°, bevel at 0°
NOTE: Always perform a dry run cut so you can determine
if the operation being attempted is possible before power is
applied to the saw.
CUTTING CROWN MOLDING (FIG. EE, FF )
Your compound miter saw is suited for the difficult task of
cutting crown molding. To fit properly, crown molding must be
compound-mitered with extreme accuracy.
The two surfaces on a piece of crown molding that fit flat
against the ceiling and wall are at angles that, when added
together equal exactly 90°.
NOTE: The chart below references a compound cut for crown molding ONLY WHEN THE ANGLE BETWEEN THE WALLS
EQUALS EXACTLY 90°.
BEVEL SETTING
KEY
II 33.9º
ID 33.9º
EI 33.9º
ED 33.9º
F
e
Workpiece
n
c
e
Miter Saw Table
miter at 0°, bevel at 45°
MITER SETTING
Inside corner-Left side
31.6° Right
Inside corner-Right side
31.6° Left
Outside corner-Left side
31.6° Left
Outside corner-Right side
31.6° Right
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°.
In order to accurately cut crown molding for a 90° inside or
outside corner, lay the molding with its broad back surface
flat on the saw table.
When setting the bevel and miter angles for compound
miters, remember that the settings are interdependent;
changing one changes the other, as well.
F
e
n
c
e
Miter Saw Table
Bevel/Miter Settings
Settings for standard crown molding lying flat on compound
miter saw table.
Inside Corner
Fig. FF
IL
T Y P E O F C U T
1. Position top of molding against fence.
2. Miter table set at RIGHT 31.6°.
3. LEFT side is finished piece.
1. Position bottom of molding against fence.
2. Miter table set at LEFT 31.6°.
3. LEFT side is finished piece.
1. Position bottom of molding against fence.
2. Miter table set at LEFT 31.6°.
3. RIGHT side is finished piece.
1. Position top of molding against fence.
2. Miter table set at RIGHT 31.6°.
3. RIGHT side is finished piece.
18
Fig. EE
Workpiece
OR
OL
IR
Outside Corner