Compound Mitre; Dust Extraction; Vertical Mitre Cross-Cut - DeWalt DW777-XE Instruction Manual

VERTICAL MITRE CROSS-CUT (FIG. 21)
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 lock lever 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
FIG. 21
BEVEL CROSS-CUTS (FIG. 18, 22)
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. Loosen the bevel clamp handle (T) and set the bevel as desired.
2. Set the override button (EE) if required.
3. Hold the head firmly and do not allow it to fall.
4. Tighten the bevel clamp handle (T) firmly.
5. Proceed as for a vertical straight cross-cut.
FIG. 22
Quality of Cut
The smoothness of any cut depends on a number of variables, i.e. the material
being cut. When smoothest cuts are desired for moulding andother 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. 3)
1. Whenever possible, clamp the wood to the saw.
2. For best results use the material clamp (KK) made for use with your saw.
Clamp the workpiece to the fence whenever possible. You can clamp to
either side of the saw blade; remember to position your clamp against a
solid, flat surface of fence.
WARNING: Always use a material clamp when cutting small pieces.
Compound Mitre (Fig. 23, 24)
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 23.
FIG. 24
FIG. 23
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.
• The chart on page 11 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. 24) 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.
1. Set your saw to the prescribed angles and make a few trial cuts.
2. Practice fitting the cut pieces together.
Example: To make a four-sided box with 25° exterior angles
(angle "A") (Fig. 24), use the upper right arc. Find 25° on the arc scale.
Follow the horizontal intersecting line to either side to get the mitre angle
setting on the saw (23°). Likewise follow the vertical intersecting line to the
top or bottom to get the bevel angle setting on the saw (40°). Always try
cuts on a few scrap pieces of wood
to verify the settings on the saw.
WARNING: Never exceed the compound mitre limits of 45° bevel with 45°
left or right mitre.
Support for Short and Long Pieces (Fig. 3)
CUTTING SHORT MATERIAL
It is advisable to use the length stop (OO) for short workpieces both for batch
sawing and for short individual workpieces of different lengths. The length stop
can only be used in conjunction with a pair of optional guide rails (II).
8
CUTTING LARGE MATERIAL
WARNING: To reduce the risk of injury, always support long workpieces.
Figure 3 shows the ideal configuration for sawing long workpieces when the
saw is used free-standing (all items available as an option).
These items (except the legstand and the material clamp) are required both on
the infeed and the outfeed side:
– Legstand (NN) (supplied with mounting instructions).
– Guide rails (500 or 1,000 mm) (II).
– Stands (MM) to support the guide rails. Do not use the stands to support
the machine! The height of the stands is adjustable.
– Material support plates (JJ).
– Table end plate (HH) for supporting the rails (also when working on an
existing bench).
– Material clamp (KK).
– Swivelling stop (LL).
1. Place your saw on the legstand and fit the guide rails.
2. Firmly screw the material support plates (JJ) to the guide rails (II).
3. The material clamp (KK) now functions as a length stop.
4. Install the table end plates (HH).
5. Install the swivelling stop (LL) to the rear rail.
6. Use the swivelling stop (LL) to adjust the length of medium and long
workpieces. It can be adjusted sideways or swung out of the way when
not in use.
Dust Extraction (Fig. 1, 6)
WARNING: Whenever possible, connect a dust extraction device designed in
accordance with the relevant regulations regarding dust emission.
Connect a dust collection device designed in accordance with the relevant
regulations. The air velocity of externally connected systems shall be 20m/s
+/- 2 m/s. Velocity to be measured in the connection tube at the point of
connection, with the tool connected but not running.
A separate dust kit is available as an option (DE7777).
1. Fit the dust extraction tubes (QQ) to the nozzles (Q); the longer hose
to upper nozzle.
2. Connect the hoses to the three-way connector (RR).
Transporting (Fig. 1)
WARNING: In order to conveniently carry the mitre saw, the base is provided
with two hand indentations (FF).
1. To transport the saw, set the bevel and mitre positions to 0°.
2. Press the lower guard lock up release lever (B) (Fig.1).
3. Press the head down and press the lock down button (W) (Fig. 2).
4. Bring the saw blade to rest position and press the traverse lock (R).
MAINTENANCE
WARNING: To reduce the risk of injury, turn unit off and disconnect
machine from power source before installing and removing accessories,
before adjusting or changing set-ups or when making repairs. Be sure the
trigger switch is in the OFF position. An accidental start-up can cause injury.
WARNING: If the saw blade is worn replace it with a new sharp blade.
DO NOT use lubricants or cleaners (particularly spray or aerosol) in the vicinity
of the plastic guard. The polycarbonate material used in the guard is subject to
attack by certain chemicals.
1. All bearings are sealed. They are lubricated for life and need no further
maintenance.