Compound Cutting - Makita LS0815F Manual De Instrucciones

5. Compound cutting

Compound cutting is the process in which a bevel
angle is made at the same time in which a miter angle
is being cut on a workpiece. Compound cutting can be
performed at the angle shown in the table.
Miter angle
Left and Right 0° - 45°
010340
When performing compound cutting, refer to "Press
cutting", "Slide cutting", "Miter cutting" and "Bevel cut"
explanations.
6. Cutting crown and cove moldings
Crown and cove moldings can be cut on a compound
miter saw with the moldings laid flat on the turn base.
There are two common types of crown moldings and
one type of cove moldings; 52/38° wall angle crown
molding, 45° wall angle crown molding and 45° wall
angle cove molding. See illustrations. (Fig. 39)
There are crown and cove molding joints which are
made to fit "Inside" 90° corners ((1) and (2) in Fig. A)
and "Outside" 90° corners ((3) and (4) in Fig. A).
(Fig. 40 & 41)
Measuring
Measure the wall length and adjust workpiece on table
to cut wall contact edge to desired length. Always
make sure that cut workpiece length at the back of
the workpiece is the same as wall length. Adjust cut
length for angle of cut. Always use several pieces for
test cuts to check the saw angles.
When cutting crown and cove moldings, set the bevel
angle and miter angle as indicated in the table (A) and
position the moldings on the top surface of the saw
base as indicated in the table (B).
In the case of left bevel cut
Molding
position in
52/38° type
Fig. A
(1)
For inside
corner
(2)
Left 33.9°
(3)
For outside
corner
(4)
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Molding
Molding edge against
position in
guide fence
Fig. A
Ceiling contact edge
(1) should be against guide
For inside
fence.
corner
(2)
Wall contact edge should
be against guide fence.
(3)
For outside
Ceiling contact edge
corner
(4) should be against guide
fence.
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Example:
In the case of cutting 52/38° type crown molding for
position (1) in Fig. A:
Bevel angle
Left 0° - 45°
Table (A)
Bevel angle Miter angle
45° type 52/38° type
Right 31.6° Right 35.3°
Left 30° Left 31.6°
Right 31.6° Right 35.3°
Table (B)
Finished piece
Finished piece will be on
the Left side of blade.
Finished piece will be on
the Right side of blade.
• Tilt and secure bevel angle setting to 33.9° LEFT.
• Adjust and secure miter angle setting to 31.6°
RIGHT.
• Lay crown molding with its broad back (hidden)
surface down on the turn base with its CEILING
CONTACT EDGE against the guide fence on the
saw.
• The finished piece to be used will always be on the
LEFT side of the blade after the cut has been
made.
7. Cutting aluminum extrusion (Fig. 42)
When securing aluminum extrusions, use spacer
blocks or pieces of scrap as shown in the figure to
prevent deformation of the aluminum. Use a cutting
lubricant when cutting the aluminum extrusion to
prevent build-up of the aluminum material on the
blade.
WARNING:
• Never attempt to cut thick or round aluminum
extrusions. Thick or round aluminum extrusions can
be difficult to secure and may work loose during the
cutting operation which may result in loss of control and
serious personal injury.
8. Wood facing
Use of wood facing helps to assure splinter-free cuts
in workpieces. Attach a wood facing to the guide fence
using the holes in the guide fence.
See the figure concerning the dimensions for a
suggested wood facing. (Fig. 43)
CAUTION:
• Use straight wood of even thickness as the wood
facing.
WARNING:
• Use screws to attach the wood facing to the guide
fence. The screws should be installed so that the
screw heads are below the surface of the wood
facing so that they will not interfere with the
positioning of the material being cut. Misalignment
45° type
of the material being cut can case unexpected
movement during the cutting operation which may
result in a loss of control and serious personal injury.
Left 35.3°
NOTICE:
• When the wood facing is attached, do not turn the turn
base with the handle lowered. The blade and/or the
wood facing will be damaged.
9. Groove cutting (Fig. 44)
A dado type cut can be made by proceeding as
follows:
Adjust the lower limit position of the blade using the
adjusting screw and the stopper arm to limit the cutting
depth of the blade. Refer to "Stopper arm" section
described previously.
After adjusting the lower limit position of the blade, cut
parallel grooves across the width of the workpiece
using a slide (push) cut as shown in the figure. Then
remove the workpiece material between the grooves
with a chisel.
WARNING:
• Do not attempt to perform this type of cut by using
a wider type blade or dado blade. Attempting to
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