DeWalt DWS778 Original Instructions Manual page 35

WARNING: Remember to lock the saw head in the
rear position when the sliding cuts are finished.
VERTICAL MITRE CROSS-CUT (FIG. 1, 19)
1. Squeeze the mitre latch (M). Move the arm left or right to the
required angle.
2. The mitre latch will automatically locate at 0°, 15°, 22.5°,
31.62°, 45° and 50° both left and right. If any intermediate
angle is required hold the head firmly and lock by fastening
the mitre latch.
3. Always ensure that the mitre latch is locked tightly before
cutting.
4. Proceed as for a vertical straight cross-cut.
WARNING: When mitring the end of a piece of wood
with a small off-cut, position the wood to ensure that
the off-cut is to the side of the blade with the greater
angle to the fence, i.e.:
left mitre, off-cut to the right
right mitre, off-cut to the left
BEVEL CROSS-CUTS (FIG. 11, 14, 20)
Bevel angles can be set from 0° to 48° to the left. Bevels up
to 45° can be cut with the mitre arm set between zero and a
maximum of 45° mitre position right or left.
1. Unlock the sliding fence lever (I) and move the fence away
from the blade.
2. Loosen the bevel clamp handle (T) and set the bevel as
desired.
3. Set the override button (CC) if required.
4. Hold the head firmly and do not allow it to fall.
5. Tighten the bevel clamp handle (T) firmly.
6. Slide the fence towards the blade making sure it does not
touch the blade, then tighten the fence lock lever by turning
clockwise.
7. Proceed as for a vertical straight cross-cut.
Cutting Non-Ferrous Metals
When cutting non-ferrous metals, the machine is only to be used
to perform vertical straight and mitre cross-cuts in the mitre saw
mode. We recommend that bevel and compound mitre cuts
should not be performed in non-ferrous metals. The machine is
not to be used for cutting ferrous metals.
• Always use a material clamp when cutting non-ferrous
metals. Make sure that the workpiece is clamped securely.
• Only apply saw blades that are qualified for cutting non-
ferrous metals.
• When using lubricants, only apply wax or separation spray.
Do not use emulsions or similar fluids.
The smoothness of any cut depends on a number of variables,
i.e., the material being cut. When smoothest cuts are desired for
moulding and other precision work, a sharp (60-tooth carbide)
blade and a slower, even cutting rate will produce the desired
results.
WARNING: Ensure that the material does not creep
while cutting; clamp it securely in place. Always let
the blade come to a full stop before raising the arm.
If small fibres of wood still split out at the rear of the
workpiece, stick a piece of masking tape on the
wood where the cut will be made. Saw through the
tape and carefully remove tape when finished.
Clamping the Workpiece (Fig. 23–25)
WARNING: Always use a material clamp.
For best results use the material clamp (FF) made for use with
your saw.
Always use a material clamp when cutting non-ferrous metals.
Make sure that the workpiece is clamped securely.
TO INSTALL CLAMP
1. Insert it into the hole behind the fence. The clamp (FF)
should be facing toward the back of the mitre saw. Ensure
the groove on the clamp rod is fully inserted into the base of
the mitre saw. If the groove is visible, the clamp will not be
secure.
2. Rotate the clamp 180º toward the front of the mitre saw.
3. Loosen the knob to adjust the clamp up or down, then use
the fine adjust knob to firmly clamp the workpiece.
NOTE: Place the clamp on the right side of the base when
beveling. ALWAYS MAKE DRY RUNS (UNPOWERED) BEFORE
FINISH CUTS TO CHECK THE PATH OF THE BLADE. ENSURE
THE CLAMP DOES NOT INTERFERE WITH THE ACTION OF
THE SAW OR GUARDS.
Compound Mitre (Fig. 21, 22)
This cut is a combination of a mitre and a bevel cut. This is the
type of cut used to make frames or boxes with slanting sides like
the one shown in Figure 21.
WARNING: If the cutting angle varies from cut to
cut, check that the bevel clamp handle and the mitre
clamping knob are securely tightened. These must be
tightened after making any changes in bevel or mitre.
WARNING: The saw must be fixed on a base
support when performing compound cuts to prevent
tip over (Fig. 22). Refer to Bench Mounting.
• The chart shown below will assist you in selecting the proper
bevel and mitre settings for common compound mitre cuts.
• To use the chart, select the desired angle "A" (Fig. 21) of your
project and locate that angle on the appropriate arc in the
chart. From that point follow the chart straight down to find
the correct bevel angle and straight across to find the correct
mitre angle.
0 5 10 15 20
45
40
35
6 SIDED BOX
30
25
20
15
10
8 SIDED BOX
5
0 5 10 15 20
SET THIS BEVEL ANGLE ON SAW
english
25 30 35 40 45
SQUARE BOX
40
35
30
25
20
15
10
5
25 30 35 40 45
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