DeWalt DWS778 - Cutting Non-Ferrous Metals; Clamping the Workpiece; Compound Mitre; Dust Extraction

12
ENGLISH
If adjustment is required, turn the 45° bevel adjustment stop screw
23
in or
out as necessary until the pointer
46
indicates 45°.
Prior to Operation
• Install the base extensions to both sides of the saw's base. Refer to
Assembling the Base Extensionssection.
• Check the protective belt cover for damage and the proper functioning
of the lowerguard.
• Make sure to use the kerf plate. Do not operate the machine if the kerf
slot is wider than 12mm.
• Install the appropriate saw blade. Do not use excessively worn blades.
The maximum rotation speed of the tool must not exceed that of the
sawblade.
• Make sure all locking knobs and clamp handles aretight.
• Use personal protective equipment and connect the saw to an external
dustextractor.
• Although this saw will cut wood and many nonferrous materials, these
operating instructions refer to the cutting of wood only. The same
guide-lines apply to the other materials. Do not cut ferrous (iron and
steel) materials, fibre cement or masonry with this saw!
• Do not attempt to cut excessively smallpieces.
• Secure theworkpiece.
• Allow the blade to cut freely. Do notforce.
• Allow the motor to reach full speed beforecutting.
OPERATION
Instructions for Use

WARNING: Always observe the safety instructions and
applicableregulations.

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.
Ensure the machine is placed to satisfy your ergonomic conditions in terms
of table height and stability. The machine site shall be chosen so that the
operator has a good overview and enough free surrounding space around
the machine that allows handling of the workpiece without anyrestrictions.
To reduce effects of increased vibration, make sure the environment is not
too cold, the machine and accessory are well maintained and the workpiece
size is suitable for thismachine.
Switching On and Off (Fig.A, B)
A hole
30
is provided in the trigger switch
1
for insertion of a padlock to
lock thetool.
1. To run the tool, press the trigger switch
1
.
2. To stop the tool, release theswitch.
Use of XPS LED Worklight System (Fig.B)
NOTE: The mitre saw must be connected to a powersource.
The XPS LED Worklight System is equipped with an on/off switch
31
. The
XPS LED Worklight System is independent of the mitre saw’s trigger switch.
The light does not need to be on in order to operate thesaw.
To cut through an existing pencil line on a piece of wood:
1. Turn on the XPS system, then pull down on the operating handle to
bring the saw blade
7
close to the wood. The shadow of the blade will
appear on thewood.
2. Align the pencil line with the edge of the blade’s shadow. You may
have to adjust the mitre or bevel angles in order to match the pencil
lineexactly.
Body and Hand Position (Fig. N)
Proper positioning of your body and hands when operating the mitre saw
will make cutting easier, more accurate andsafer.

WARNING:
• Never place your hands near the cuttingarea.
• Place your hands no closer than 100 mm from theblade.
• Hold the workpiece tightly to the table and the fence when cutting.
Keep your hands in position until the switch has been released and
the blade has completelystopped.
• Always make dry runs (without power) before finish
cuts so that you can check the path of theblade.
• Do not cross yourhands.
• Keep both feet firmly on the floor and maintain properbalance.
• As you move the saw arm left and right, follow it and stand slightly
to the side of the sawblade.
Basic Saw Cuts
Vertical Straight Cross-cut (Fig.A,B,N)
NOTE: Use 250 mm saw blades with 30 mm arbor holes to obtain the
desired cuttingcapacities.
1. Raise the saw head
27
to its highest position by pushing down on the
saw head
27
and pulling out the lock-down button
25
. Release the
downward pressure and allow the saw head to rise to its fullheight.
2. Squeeze the mitre latch
11
then move the arm to the 0°position.
3. Release the mitrelatch.
4. Always ensure that the mitre latch is locked tightly beforecutting.
5. Place the wood to be cut against the sliding fence
15
and secure it
with the material clamp
19
.
6. Take hold of the operating handle and press the guard lock-up release
lever
2
to release the guard. Press the trigger switch
1
to start the
motor. It is recommended to start the cut near thefence.
7. Depress the head to allow the blade to cut through the timber and
enter the plastic kerf plate
9
.
8. After completing the cut, release the switch and wait for the saw blade
to come to a complete standstill before returning the head to its upper
restposition.

WARNING:
• For some types of plastic profiles, it is advisable to follow the
sequence in reverseorder.
• The lower blade guard is designed to close quickly when the
lever
2
is released. If it does not, have the saw serviced by an
authorized
DeWALT
repairagent.
Performing a Sliding Cut (Fig.A,B,O)
1. Turn the saw head rail lock knob
17
toloosen.
2. Push down the saw head
27
, pull out the lock-down button
25
and
let the saw head rise to it’s highestposition.
3. Place the wood to be cut against the sliding fence
15
and secure it
with the material clamp
19
.
4. Lower the saw head then pull it to the end of itstravel.
5. Press the guard lock-up release lever
2
to release the guard. Press the
trigger switch
1
to start themotor.
6. Totally depress the head to allow the blade to cut through the timber
and push the head back to complete thecut.
7. After completing the cut, release the switch and wait for the saw blade
to come to a complete standstill before returning the head to its upper
restposition.

WARNING: Remember to lock the saw head in the rear position when
the sliding cuts arefinished.