Prior To Operation - DeWalt DCS778 Original Instructions Manual

WARNING: The teeth of a new blade are very sharp and can
be dangerous.

WARNING: Be aware the saw blade shall be replaced in the described
way only. Only use saw blades as specified under Technical Data;
Cat.no.: DT4320 is suggested.
1. Insert the 6 mm hex key into the opposite location of the blade
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shaft and hold it (Fig. D).
2. Use second hex key as shown in Figure D as spindle lock.
3. Loosen the blade bolt 6 by turning clockwise. Remove the blade bolt
and the outer flange 5 .
4. Press the lower guard lock up release lever
guard 7 and remove the saw blade
5. Install the new saw blade onto the shoulder provided on the inner
flange 32 making sure that the teeth at the bottom edge of the blade
are pointing towards the fence (away from the operator).
6. Replace the outer flange 5 , making sure that the location lugs are
engaged correctly, one on each side of the motor shaft
7. Tighten the blade bolt 6 by turning anti-clockwise while holding the
6 mm hex key engaged with your other hand (Fig. D).
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ADJUSTMENTS

WARNING: To reduce the risk of serious personal injury, turn
machine off and disconnect battery pack before making any
adjustments or removing/installing attachments or accessories.
An accidental start-up can cause injury.
Your mitre saw was accurately adjusted at the factory. If readjustment
due to shipping and handling or any other reason is required, follow the
steps below to adjust your saw. Once made, these adjustments should
remain accurate.
Adjusting the Traverse Bars for Constant Cutting
Depth (Fig. A, B, F, H)
The blade must run at a constant cutting depth along the full length of the
table and must not touch the fixed table at the rear of the slot or at the front
of the rotating arm. To achieve this, the traverse arms must be perfectly
parallel to the table when the saw head is fully depressed.
1. Press the lower guard lock up release lever
2. Press the saw head fully to the rear position and measure the height
from the rotating table 14 to the bottom of the outer flange
3. Turn the saw head traverse lock
4. Keeping the saw head fully depressed, pull the head to the end of
its travel.
5. Measure the height indicated in figure F again. Both values should
be identical.
6. If adjustment is required, proceed as follows (Fig. H):
a. Loosen the locknut in the bracket
37
as required, proceeding in small steps.
b. Tighten the locknut .
37

WARNING: Always check that the blade does not touch the table at
the rear of the slot or at the front of the rotating arm at 90° vertical
and 45° bevel positions. Do not switch on before having checked this!
Adjusting the Fence (Fig. I)
Turn the sliding fence lock knob
9
sliding fence to a position that avoids the blade cuts it,then tighten the
16
fence lock knob by turning clockwise.
Checking and Adjusting the Blade to the Fence
(Fig. B, J, K)
1. Slacken the mitre latch 13 .
2. Place your thumb on the mitre arm
to release the rotating table/mitre arm
2 to raise the lower blade
8 .
.
36
2 (Fig. A).
5 (Fig. F).
18 (Fig. B).
and adjust the screw
38
anti-clockwise to loosen. Move the
12 and squeeze the mitre latch
14 .
3. Swing the mitre arm until the latch locates it at the 0° mitre position.
4. Pull down the head and lock it in this position using the lock down
button 22 .
5. Check that the two 0° markings
just visible.
6. Place a square 41 against the left side of the fence

WARNING: Do not touch the tips of the blade teeth with the square.
7. If adjustment is required, proceed as follows:
a. Loosen the screws
or right until the blade is at 90° to the fence as measured with the
square (Fig. J).
b. Retighten the screws
Checking and Adjusting the Blade to the Table
(Fig. L–N)
1. Loosen the bevel clamp handle
2. Press the saw head to the right to ensure it is fully vertical and tighten
the bevel clamp handle.
3. Place a set square
41

WARNING: Do not touch the tips of the blade teeth with the square.
4. If adjustment is required, proceed as follows:
a. Loosen the bevel clamp handle
adjustment stop screw
table as measured with the square.
b. If the bevel pointer
loosen the screws
as necessary.
Checking and Adjusting the Bevel Angle (Fig. A, L, N)
The bevel override allows the max. bevel angle to be set at 45° or 48°
as required.
• Left = 45°
• Right = 48°
1. Make sure the override knob
2. Loosen the bevel clamp handle
3. This is the 45° bevel position.
4. If adjustment is required, turn the stopscrew
until the pointer 44

WARNING: The guide grooves can become clogged with sawdust. Use
a stick or some low pressure air to clear the guide grooves.

Prior to Operation


WARNING:
• Install the appropriate saw blade. Do not use excessively worn
39
blades. The maximum rotation speed of the tool must not exceed
that of thesaw blade.
• Do not attempt to cut excessively small pieces.
• Allow the blade to cut freely. Do not force.
• Allow the motor to reach full speed before cutting.
• Make sure all locking knobs and clamp handles are tight.
• Secure the workpiece.
• Although this saw will cut wood and many nonferrous
materials,these operating instructions refer to the cutting of wood
only. The sameguide-lines apply to the other materials. Do not cut
ferrous (iron and steel) materials or masonry with this saw! Do not
use any abrasive discs!
• Make sure to use the kerf plate. Do not operate the machine if the
kerf slot is wider than 10 mm.
13 • Placing the workpiece on a piece of wood will increase the
capacities to 300 mm.
40 on the mitre scale 15
16
42 and move the scale/mitre arm assembly left
42 .
19 (Fig. L).
on the table and up against the blade
and turn the vertical position
19
43 in or out until the blade is at 90° to the
44 does not indicate zero on the bevel scale
45 that secure the scale and move the scale
46 is located in the left position.
19 and move the saw head to the left.
47 in or out as necessary
indicates 45°.
EnGLIsh
are
and blade 8 .
(Fig. M).
8
20 ,
33