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13
ENGLISH
Non-Through-Cutting (Grooving and Rabbeting)
Instructions in the Crosscuts, Bevel Cuts and Cutting Compound Miters sections are for cuts
made through the full thickness of the material. The saw can also perform non‑through cuts to
form grooves or rabbets in thematerial.
Groove Cut (Fig. A)
Refer to Depth Stop for detailed instructions for setting depth of cut. A piece of scrap wood
should be used to verify the desired depth ofcut.
Hold the wood firmly on the table and against the fence
12
. Align the cut area underneath
the blade. Position the saw arm fully forward, with blade in down position. Turn on the saw by
squeezing the trigger switch
1
shown in FigureA. Smoothly, push saw arm rearward to cut a
groove through the workpiece.
Release the trigger switch with the saw arm down. When saw blade has completely stopped,
raise the saw arm. Always let the blade come to a full stop before raising thearm.
To widen the groove, repeat steps 1–4 until the desired width isobtained.
To cut through an existing pencil line on a piece of wood, match the angle as close as possible.
Cut the wood a little too long and measure from the pencil line to the cut edge to determine
which direction to adjust the miter angle and recut. This will take some practice, but it is a
commonly usedtechnique.
Bevel Cuts (Fig. A)
A bevel cut is a crosscut made with the saw blade leaning at an angle to the wood. In order
to set the bevel, loosen the bevel lock
13
, and move the saw to the left or right as desired.
(It is necessary to move the fence to allow clearance.) Once the desired bevel angle has been
set, tighten the bevel lock firmly. Refer to the Controls section for detailed instructions on the
bevelsystem.
Bevel angles can be set from 49º right to 49º left and can be cut with the miter arm set
between 50º left or 60º right. At some extreme angles, the right or left side fence might have
to be removed. To remove the left or right fence, unscrew the fence adjustment knob
16
several turns and slide the fenceout.
NOTE: Refer to Fence Adjustment in the Adjustments section for important information on
adjusting the fences for certain bevelcuts.
Quality of Cut
The smoothness of any cut depends on a number of variables. Things like material being cut,
blade type, blade sharpness and rate of cut all contribute to the quality of thecut.
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 desiredresults.
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 raisingarm.
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
whenfinished.
For varied cutting applications, refer to the list of recommended saw blades for your saw and
select the one that best fits your needs. Refer to Saw Blades underAccessories.
Through-Cutting Operations (Fig. A)
If the slide feature is not used, ensure the saw head is pushed back as far as possible and the
rail lock knob is tightened. This will prevent the saw from sliding along its rails as the workpiece
isengaged.
NOTE: Although this saw will cut wood and many non‑ferrous materials, we will limit our
detailed discussion to the cutting of wood only. The same guidelines apply to the other
materials. DO NOT CUT FERROUS (IRON AND STEEL) MAT ERIALS OR MASONRY WITH THIS SAW.
Do not use any abrasiveblades.
NOTE: Refer to Guard Actuation and Visibility in the Adjustments section for important
information about the lower guard beforecutting.
Crosscuts (Fig. A, Q)
A crosscut is made by cutting wood across the grain at any angle. A straight crosscut is made
with the miter arm at the zero degree position. Set and lock the miter arm at zero, hold the
wood firmly on the table and against the fence. With the rail lock knob tightened, turn on the
saw by squeezing the trigger switch
1
shown in FigureA.
When the saw comes up to speed (about 1second) lower the arm smoothly and slowly to cut
through the wood. Let the blade come to a full stop before raising arm.
When cutting anything larger than a 2x 8(51 x 203mm [2 x 6(51 x 152) at 45º miter]) use an
out‑down‑back motion with the rail lock knob 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 theworkpiece.
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.
NOTE: To provide greater crosscut capacity with reduced stroke, the blade on the DCS781
extends deeper into the table. As a result, a greater lifting force on the workpiece may be
experienced during thecut.
CAUTION: Always use a work clamp to maintain control and reduce the risk of workpiece
damage and personal injury, if your hands are required to be within 4" (100mm) of the
blade during thecut.
NOTE: The rail lock knob
30
shown in Figure A must be loose to allow the saw to slide along
its rails
24
.
Miter crosscuts are made with the miter arm at some angle other than zero. This angle is often
45º for making corners, but can be set anywhere from zero to 50º left or 60° right. Make the
cut as described above.
When performing a miter cut on workpieces wider than a 2x 6that are shorter in length,
always place the longer side against the fence
12
(Figure Q).
Dust Extraction (Fig. O)
WARNING: To reduce the risk of serious personal injury, turn tool off, and remove
the battery pack before transporting, making any adjustments, cleaning,
repairing, or removing/installing attachments or accessories. An accidental
start‑up can causeinjury.
CAUTION: Never operate this saw unless the dust bag or DEWALT dust extractor is
in place. Wood dust may create a breathinghazard.
Your saw has a built‑in dust port that allows an Airlock™ compatible dust collection system
to be connected. Use of a non‑Airlock dust collection system requires the use of the supplied
vacuum adapter.
Our recommended optimal solution:
• Vaccuum (DXV14P)
• Separator (DXVCS003)
• 2‑½" x 7' Hose (DXVA19‑2501)
• Vacuum Adapter: Used for DXV series vacuums and other non‑Airlock
compatiblevacuums.
To Attach the Dust Bag (Fig. P)
1. Fit the dust bag
53
to the dust port
17
as shown in FigureP.
To Empty the Dust Bag (Fig. P)
1. Remove dust bag
53
from the saw and gently shake or tap the dust bag toempty.
2. Reattach the dust bag back onto the dust port
17
.
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 dustreceptacle.
Trigger Switch (Fig. N)
To turn the saw on, push the lock‑off lever
41
to the left, then depress the trigger switch
1
.
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
52
is
provided in the trigger for insertion of a padlock to lock the switchoff.
Always be sure the blade has stopped before removing it from thekerf.
Clamping the Workpiece (Fig. A)
WARNING: To reduce the risk of serious personal injury, turn tool off, and remove
the battery pack before transporting, making any adjustments, cleaning,
repairing, or removing/installing attachments or accessories. An accidental
start‑up can causeinjury.
WARNING: A workpiece that is clamped, balanced and secure before a cut may become
unbalanced after a cut is completed. An unbalanced load may tip the saw or anything the
saw is attached to, such as a table or workbench. When making a cut that may become
unbalanced, properly support the workpiece and ensure the saw is firmly bolted to a stable
surface. Personal injury mayoccur.
WARNING: The clamp foot must remain clamped above the base of the saw whenever
the clamp is used. Always clamp the workpiece to the base of the saw–not to any other
part of the work area. Ensure the clamp foot is not clamped on the edge of the base of
thesaw.
CAUTION: Always use a work clamp to maintain control and reduce the risk of workpiece
damage and personalinjury.
If you cannot secure the workpiece on the table and against the fence by hand, (irregular
shape, etc.) or your hand would be less than 4" (100mm) from the blade, a clamp or other
fixture must beused.
For best results use the vertical material clamp
23
provided with your saw. Additional clamps
can be purchased at your local retailer or DEWALT servicecenter.
Other aids such as spring clamps, bar clamps or C‑clamps may be appropriate for certain sizes
and shapes of material. Use care in selecting and placing these clamps. Take time to make a dry
run before making the cut. The left fence will slide from side to side to aid in clamping
To Install Clamp (Fig. A)
1. Insert clamp post into the hole behind the fence
12
.
2. Adjust the clamp up turning the knob counterclockwise. And clamp down by turning the
knob clockwise. Make sure to firmly clamp theworkpiece.
NOTE: Place the clamp on the opposite 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 ORGUARDS.
completely stopped. ALWAYS MAKE DRY RUNS (UNPOWERED) BEFORE FINISH CUTS SO THAT
YOU CAN CHECK THE PATH OF THE BLADE. DO NOT CROSS ARMS, AS SHOWN IN FIGUREM.
Keep both feet firmly on the floor and maintain proper balance. As you move the miter arm
left and right, follow it and stand slightly to the side of the saw blade. Sight through the guard
louvers when following a pencilline.
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