DeWalt DWS778 Manuel de service télécharger pdf (Page 14)

ENGLISH

Cutting Non-Ferrous Metals

When cutting non-ferrous metals, the machine is only to be used to

perform vertical straight and mitre cross-cuts in the mitre saw mode.

We recommend that bevel and compound mitre cuts should not be

performed in non-ferrous metals. The machine is not to be used for

cutting ferrous metals.

• Always use a material clamp when cutting non-ferrous metals.

Make sure that the workpiece is clamped securely.

• Only apply saw blades that are qualified for cutting non-ferrous

metals.

• When using lubricants, only apply wax or separation spray. Do not

use emulsions or similar fluids.

The smoothness of any cut depends on a number of variables, i.e., the

material being cut. When smoothest cuts are desired for moulding 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 creep while

cutting; clamp it securely in place. Always let the blade

come to a full stop before raising the arm. If small fibres 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.

Clamping the Workpiece (ﬁ g. 23–25)

WARNING: Always use a material clamp.

For best results use the material clamp (ff) made for use with your saw.

Always use a material clamp when cutting non-ferrous metals. Make

sure that the workpiece is clamped securely.

TO INSTALL CLAMP

1. Insert it into the hole behind the fence. The clamp (ff) should be

facing toward the back of the mitre saw. Ensure the groove on

the clamp rod is fully inserted into the base of the mitre saw. If the

groove is visible, the clamp will not be secure.

2. Rotate the clamp 180º toward the front of the mitre saw.

3. Loosen the knob to adjust the clamp up or down, then use the fine

adjust knob to firmly clamp the workpiece.

NOTE: Place the clamp on the right 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 OR GUARDS.

Compound Mitre (ﬁ g. 21, 22)

This cut is a combination of a mitre and a bevel cut. This is the type

of cut used to make frames or boxes with slanting sides like the one

shown in Figure 21.

WARNING: If the cutting angle varies from cut to cut,

check that the bevel clamp handle and the mitre clamping

knob are securely tightened. These must be tightened after

making any changes in bevel or mitre.

• The chart shown below will assist you in selecting the proper bevel

and mitre settings for common compound mitre cuts.

• To use the chart, select the desired angle “A” (fig. 22) of your

project and locate that angle on the appropriate arc in the chart.

From that point follow the chart straight down to find the correct

bevel angle and straight across to find the correct mitre angle.

0 5 10 15 20 25 30 35 40 45

SET THIS BEVEL ANGLE ON SAW

SET THIS MITER ANGLE ON SAW

ANGLE OF SIDE OF BOX (ANGLE"A")

SQUARE BOX

6 SIDED BOX

8 SIDED BOX

1. Set your saw to the prescribed angles and make a few trial cuts.

2. Practice fitting the cut pieces together.

Example: To make a four-sided box with 25° exterior angles

(angle “A”) (fig. 22), use the upper right arc. Find 25° on the arc

scale. Follow the horizontal intersecting line to either side to get

the mitre angle setting on the saw (23°). Likewise follow the vertical

intersecting line to the top or bottom to get the bevel angle setting

on the saw (40°). Always try cuts on a few scrap pieces of wood

to verify the settings on the saw.

WARNING: Never exceed the compound mitre limits of

45° bevel with 45° left or right mitre.

Dust Extraction (ﬁ g. 1, 3, 4)

WARNING: Whenever possible, connect a dust extraction

device designed in accordance with the relevant regulations

regarding dust emission.

Connect a dust collection device designed in accordance with the

relevant regulations. The air velocity of externally connected systems

shall be 20 m/s +/- 2 m/s. Velocity to be measured in the connection

tube at the point of connection, with the tool connected but not

running.

NOTE: The DWV9000 twist-lock quick connector (ii) is recommended

as an optional accessory to connect to the dust extraction device.

Transporting (ﬁ g. 1, 2)

WARNING: In order to conveniently carry the mitre saw,

the base is provided with two hand indentations (dd). Never

use guards to lift or transport the mitre saw.

1. To transport the saw, set the bevel and mitre positions to 0°.

2. Press the lower guard lock-up release lever (b) (fig.1).

3. Press the saw head down and push in the lock-down button (w)

(fig.2).

4. Bring the saw head to rest position and tighten the traverse lock (s).

MAINTENANCE

Your DEWALT power tool has been designed to operate over a long

period of time with a minimum of maintenance. Continuous satisfactory

operation depends upon proper tool care and regular cleaning.

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.

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DeWalt DWS778 Manuel de service Page 14

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