Intended Use; Assembly And Adjustments; Unpacking; Bench Mounting - DeWalt DWS780 Manual

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Intended Use

Your D WALT DWS780 mitre saw has been designed for professional
e
cutting of wood, wood products and plastics. When using the appropriate
saw blades, sawing aluminium is also possible. It performs the sawing
operations of cross-cutting, bevelling and mitring easily, accurately
and safely.
This unit is designed for use with a nominal blade diameter 305 mm carbide
tip blade.
DO nOT use under wet conditions or in the presence of flammable liquids
or gases.
These mitre saws are professional power tools.
DO nOT let children come into contact with the tool. Supervision is
required when inexperienced operators use this tool.

WARNING: Do not use the machine for purposes other than intended.
• This product is not intended for use by persons (including children)
suffering from diminished physical, sensory or mental abilities; lack of
experience, knowledge or skills unless they are supervised by a person
responsible for their safety. Children should never be left alone with
this product.

ASSEMBLY AND ADJUSTMENTS


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.
Unpacking (Fig. A1, F)
1. Open the box and lift the saw out by the con venient carrying handle
as shown in Figure F.
2. Place the saw on a smooth, flat surface.
3. Release the rail lock knob 4
the rear position.
4. Press down lightly on the operating handle
down pin 9 .
5. Gently release the downward pressure and hold the operating handle,
allowing it to rise to its full height.
Bench Mounting (Fig. A1)
Holes 16 are provided in all four feet to facilitate bench mounting. Two
different-sized holes are provided to accommodate different sizes of screws.
Use either hole; it is not necessary to use both.
Always mount your saw firmly to a stable surface to prevent movement.
To enhance the tool's portability, it can be mounted to a piece of 12.7 mm
or thicker plywood which can then be clamped to your work support or
moved to other job sites and reclamped.
nOTE: If you elect to mount your saw to a piece of plywood, make sure that
the mounting screws don't protrude from the bottom of the wood. The
plywood must sit flush on the work support. When clamping the saw to
any work surface, clamp only on the clamping bosses where the mounting
screw holes are located. Clamping at any other point will interfere with the
proper operation of the saw.

CAUTION: To prevent binding and inaccuracy, be sure the mounting
surface is not warped or otherwise uneven. If the saw rocks on the
surface, place a thin piece of material under one saw foot until the saw
sits firmly on the mounting surface.
Kerf Plate Replacement (Fig. A1)
To remove the kerf plate 21 , remove the screws holding the kerf plate in
place and replace with a new one.
Assemble the screws back in by following this sequence: first through the
round holes located halfway from the ends, then through the slots at the
ends. No adjustment is necessary.
12
, and push the saw head back to lock it in
2 and pull out the lock
Assembling the Base Extensions (Fig. Y)

WARNING: Base extensions must be assembled to both sides of
the saw's base before using the saw.

WARNING: Be sure to adjust the base extensions using the
mounting slots so they are level with the saw's base.
1. Locate the holes above the hand indentations
the base.
2. Using a hex wrench, attach the screw
through the base extension
3. Ensure the extension is secure by pulling on the extension to verify
no movement.
4. Repeat steps 1 through 3 on the other side.
nOTE: Make sure the extensions are level with the work surface so that the
workpiece rests evenly. A straight workpiece should have no gap between it
and the base extensions.
Changing or Installing a New Saw Blade

WARNING: To reduce the risk of injury, wear gloves when handling
the saw blade.

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.
• Never depress the spindle lock button while the blade is under
power or coasting.
• Do not cut light alloy and ferrous metal (containing iron or steel)
or masonry or fibre cement product with this mitre saw.
3 ,
Removing the Blade (Fig. G1–G4)
1. Unplug the saw.
2. Raise the arm to the upper position and raise the lower guard
as possible.
3. Loosen, but do not remove guard bracket screw
bracket 61 can be raised far enough to access the blade screw
Lower guard will remain raised due to the position of the guard bracket
screw.
4. Depress the spindle lock button
blade 42 by hand until the lock engages.
5. Keeping the button depressed, use the other hand and the wrench
provided 29 to loosen the blade screw. (Turn clockwise, left-hand
threads.)
6. Remove the blade screw
blade adapter 60 , if used. The inner clamp washer
the spindle.
nOTE: For blades with a blade hole of 15.88 mm (5/8"), the 25.4 mm (1")
blade adapter 60 is not used.
Installing a Blade (Fig. G1–G4)
1. Unplug the saw.
2. With the arm raised, the lower guard held open and the guard bracket
raised 61 , place the blade on the spindle, onto the blade adapter (if
using a blade with a 1" [25.4 mm] diameter blade hole) and against the
inner blade clamp with the teeth at the bottom of the blade pointing
toward the back of the saw.
3. Assemble the outer clamp washer
4. Install the blade screw
screw firmly with wrench provided (turn counterclockwise, left-hand
threads).
nOTE: When using blades with a 5/8" (15.88 mm) diameter blade hole,
the blade adapter will not be used and should be stored in a safe place for
future use. The separate blade adapter is not available on all models.
14 on the side of
58 through the washer
13 , and into the holes on the base.
62 until the
40 while carefully rotating the saw
39 , outer clamp washer 41 , blade
43
41 onto the spindle.
39 and, engaging the spindle lock, tighten the
59 ,
1 as far
39 .
42 and
may be left on