DeWalt DWS780N - Page 44

42
ENGLISH
• ALWAYS MAKE DRY RUNS (UNPOWERED) BEFORE FINISH CUTS SO THAT
YOU CAN CHECK THE PATH OF THE BLADE. DO NOT CROSS HANDS, AS
SHOWN IN FIGUREN2.
• Keep both feet firmly on the floor and maintain proper balance. As you
move the mitre arm left and right, follow it and stand slightly to the side
of the sawblade.
• Sight through the guard louvers when following a pencilline.
Trigger Switch (Fig.A2)
To turn the saw on, push the lock-off lever
23
to the left, then depress the
trigger switch
22
. The saw will run while the switch is depressed. Allow the
blade to spin up to full operating speed before making the cut. To turn the
saw off, release the switch. Allow the blade to stop before raising the saw
head. There is no provision for locking the switch on. A hole
24
is provided
in the trigger for insertion of a padlock to lock the switchoff.
Your saw is not equipped with an automatic electric blade brake, but the
saw blade should stop within 10 seconds of trigger release. This is not
adjustable. If the stop time repeatedly exceeds 10 seconds, have the tool
serviced by an authorised DeWALT servicecentre.
Always be sure the blade has stopped before removing it from thekerf.
Setting the Variable Speed (Fig. A2)
DWS780 Only
The speed control dial
35
can be used for advance setting of the required
range ofspeed.
• Turn the speed control dial
35
to the desired range, which is indicated
by anumber.
• Use high speeds for sawing soft materials such as wood.
Use low speeds for sawingmetal.
Dust Extraction (Fig.A2,C)

WARNING: Certain dust, such as oak or beech dust, is
considered carcinogenic, especially in connection with wood-
treatmentadditives.
• Always use dustextraction.
• Provide for good ventilation of the workspace.
• It is recommended to wear an appropriaterespirator.
Your saw has a built-in dust port
33
that allows either a dust bag
38
or a
shop vacuum system to beconnected.
To Attach the Dust Bag
1. Fit the dust bag
38
to the dust port
33
.
To Empty the Dust Bag
1. Remove dust bag
38
from the saw and gently shake or tap the dust
bag toempty.
2. Reattach the dust bag back onto the dust port
33
.
You may notice that all the dust will not come free from the bag. This will
not affect cutting performance but will reduce the saw's dust collection
efficiency. To restore your saw's dust collection efficiency, depress the spring
inside the dust bag when you are emptying it and tap it on the side of the
trash can or dustreceptacle.

CAUTION: Never operate this saw unless the dust bag or
DeWALT dust extractor is in place. Wood dust may create a
breathinghazard.
Use of XPS LED Worklight System (Fig. A1, A2)
NOTE: The mitre saw must be connected to a powersource.
The XPS LED Worklight System is equipped with an on/off switch
25
. 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
2
to
bring the saw blade 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.
NOTE: If the LED is damaged, it must be replaced only by DeWALT or an
authorised serviceorganisation.
Through-Cutting Operations (Fig. A1, A2,O,P)
If the slide feature is not used, ensure the saw head is pushed back as far
as possible and the rail lock knob
4
is tightened. This will prevent the saw
from sliding along its rails as the workpiece isengaged.
Cutting of multiple pieces is not recommended but can be done safely by
ensuring that each piece is held firmly against the table andfence.
Straight Vertical Crosscut
1. Set and lock the mitre arm at zero, and hold the wood firmly on the
table
15
and against the fence
11
.
2. With the rail lock knob
4
tightened, turn on the saw by squeezing the
trigger switch
22
.
3. When the saw comes up to speed, lower the arm smoothly and slowly
to cut through the wood. Let the blade come to a full stop before
raisingarm.
Sliding Crosscut (Fig. O)
When cutting anything larger than a 51 x 150mm (51 x 105mm at
45° mitre) workpiece, use an out-down-back motion with the rail lock
knob
4
loosened.
Pull the saw out toward you, lower the saw head down toward the
workpiece, and slowly push the saw back to complete thecut.
Do not allow the saw to contact the top of the workpiece while pulling out.
The saw may run toward you, possibly causing personal injury or damage to
theworkpiece.
Mitre Crosscut (Fig. P)
The mitre angle is often 45° for making corners, but can be set anywhere
from zero to 50° left or 60° right. Proceed as for a straight verticalcrosscut.
When performing a mitre cut on workpieces wider than 51 x 105mm that
are shorter in length, always place the longer side against thefence.
Bevel Cut (Fig. A1, A2)
Bevel angles can be set from 49° right to 49° left and can be cut with the
mitre arm set between 50° left or 60° right. Refer to the Features and
Controls section for detailed instructions on the bevelsystem.
1. Loosen the bevel lock knob
31
, and move the saw to the left or right as
desired. It is necessary to move the fence
11
to allow clearance. Tighten
the fence adjustment knob
10
after positioning thefences.
2. Tighten the bevel lockfirmly.
At some extreme angles, the right or left side fence might have to be
removed. Refer to Fence Adjustment in the Adjustments section for
important information on adjusting the fences for certain bevelcuts.
To remove the left or right fence, unscrew the fence adjustment knob
10
several turns and slide the fenceout. The fence lanyard
36
prevents the
fence from being removed completely from the saw or being lost.
Once the bevel operations are completed, reposition the fences.
Quality of Cut
The smoothness of any cut depends on a number of variables, such as the
material being cut, blade type, blade sharpness and rate ofcut.
When smoothest cuts are desired for molding 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 move or creep while
cutting; clamp it securely in place. Always let the blade come to a full
stop before raising arm. If small fibers 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.