Automatic Electric Brake; Operation - DeWalt DWS779 Instruction Manual

Depth Stop (Fig. A)
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The depth stop allows the depth of cut of the blade to be limited. The stop is useful for
applications such as grooving and tall vertical cuts. Rotate the depth stop forward and adjust the
depth adjustment screw 28 to set the desired depth of cut. To secure the adjustment, tighten
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the wing nut . Rotating the depth stop to the rear of the saw will bypass the depth stop
feature. If the depth adjustment screw is too tight to loosen by hand, the provided blade wrench
can be used to loosen the screw.
Lock Down Pin (Fig. A)

WARNING: The lock down pin should be used only when carrying or storing the saw. NEVER
use the lock down pin for any cutting operation.
To lock the saw head in the down position, push the saw head down, push the lock down pin
in and release the saw head. This will hold the saw head safely down for moving the saw from
place to place. To release, press the saw head down and pull the pin out.

Automatic Electric Brake

Your saw is equipped with an automatic electric blade brake which stops the saw blade within
5 seconds of trigger release. This is not adjustable.
On occasion, there may be a delay after trigger release to brake engagement. On rare occasions,
the brake may not engage at all and the blade will coast to a stop.
If a delay or "skipping" occurs, turn the saw on and off 4 or 5 times. If the condition persists, have
the tool serviced by an authorized D WALT service center.
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Always be sure the blade has stopped before removing it from the kerf. The brake is not a
substitute for guards or for ensuring your own safety by giving the saw your complete attention.

OPERATION


WARNING: To reduce the risk of serious personal injury, turn unit off and disconnect
it from power source before making any adjustments or removing/installing
attachments or accessories. An accidental start-up can cause injury.

WARNING: Always use eye protection. All users and bystanders must wear eye protection
that conforms to ANSI Z87.1 (CAN/CSA Z94.3).
Plug the saw into any household 60 Hz power source. Refer to the nameplate for voltage. Be sure
the cord will not interfere with your work.
Body and Hand Position (Fig. K1–K4)

WARNING: To reduce the risk of serious personal injury, ALWAYS use proper hand position
as shown.

WARNING: To reduce the risk of serious personal injury, ALWAYS hold securely in anticipation of
a sudden reaction.
Proper positioning of your body and hands when operating the miter saw will make cutting
easier, more accurate and safer. Never place hands near cutting area. Place hands no closer than
4" (100 mm) from the blade. Hold the workpiece tightly to the table and the fence when cutting.
Keep hands in position until the trigger has been released and the blade has 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 FIGURE K3.
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 pencil line.
Fig. K1
Fig. K3
Fig. K2
Fig. K4
Trigger Switch (Fig. L)
To turn the saw on, push the lock-off lever
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
trigger for insertion of a padlock to lock the switch off.
Always be sure the blade has stopped before removing it from the kerf.
Fig. L
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Dust Extraction (Fig. M)
Your saw has a built-in dust port 15
system to be connected.
nOTE: This saw has a dust port equipped with an AirLock
that connects tools to dust extraction shrouds to minimize cleanup on the jobsite.
To Attach the Dust Bag
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1. Fit the dust bag to the dust port
Fig. M
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
is engaged.
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 abrasive blades.
nOTE: Refer to guard Actuation and Visibility in the Assembly and Adjustments section for
important information about the lower guard before cutting.
Crosscuts (Fig. A, N)
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 Figure A.
When the saw comes up to speed (about 1 second) 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 2 x 8 (51 x 203 mm [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 the workpiece.
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 DWS779
extends deeper into the table. As a result, a greater lifting force on the workpiece may be
experienced during the cut.
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to the left, then depress the trigger switch
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that allows either the supplied dust bag or a shop vacuum
fitting, which is a universal system
TM
15
as shown in Figure M.
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15
English
1
. The
is provided in the
1
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