Mode d’emploi Makita 5740NB Scie circulaire

Mode d’emploi

4

2. Check lower guard for proper closing before

each use. Do not operate saw if lower guard

does not move freely and close instantly. Never

clamp or tie the lower guard into the open posi-

tion. If saw is accidentally dropped, lower guard may

be bent. Raise the lower guard with the Retracting

Lever and make sure it moves freely and does not

touch the blade or any other part, in all angles and

depths of cut.

To check lower guard, open lower guard by hand,

then release and watch guard closure. Also check to

see that Retracting Lever does not touch tool hous-

ing. Leaving blade exposed is VERY DANGEROUS

and can lead to serious personal injury.

3. Check the operation and condition of the lower

guard spring. If the guard and the spring are not

operating properly, they must be serviced before

use. Lower guard may operate sluggishly due to

damaged parts, gummy deposits, or a buildup of

debris.

4. Lower guard should be retracted manually only

for special cuts such as “Pocket Cuts” and

“Compound Cuts.” Raise lower guard by Retract-

ing Lever. As soon as blade enters the material,

lower guard must be released. For all other saw-

ing, the lower guard should operate automatically.

5. Always observe that the lower guard is covering

the blade before placing saw down on bench or

floor. An unprotected, coasting blade will cause the

saw to walk backwards, cutting whatever is in its

path. Be aware of the time it takes for the blade to

stop after switch is released.

6. NEVER hold piece being cut in your hands or

across your leg. It is important to support the work

properly to minimize body exposure, blade binding,

or loss of control.

7. Hold tool by insulated gripping surfaces when

performing an operation where the cutting tool

may contact hidden wiring or its own cord. Con-

tact with a “live” wire will also make exposed metal

parts of the tool “live” and shock the operator.

8. When ripping always use a rip fence or straight

edge guide. This improves the accuracy of cut and

reduces the chance for blade binding.

9. Always use blades with correct size and shape

(diamond vs. round) arbor holes. Blades that do

not match the mounting hardware of the saw will run

eccentrically, causing loss of control.

10. Never use damaged or incorrect blade washers

or bolts. The blade washers and bolt were specially

designed for your saw, for optimum performance and

safety of operation.

11. Causes and Operator Prevention of Kickback:

Kickback is a sudden reaction to a pinched, bound

or misaligned saw blade, causing an uncontrolled

saw to lift up and out of the workpiece toward the

operator.

When the blade is pinched or bound tightly by the

kerf closing down, the blade stalls and the motor

reaction drives the unit rapidly back toward the oper-

ator.

If the blade becomes twisted or misaligned in the

cut, the teeth at the back edge of the blade can dig

into the top surface of the wood causing the blade to

climb out of the kerf and jump back toward operator.

Kickback is the result of tool misuse and/or incorrect

operating procedures or conditions and can be

avoided by taking proper precautions as given

below:

Maintain a firm grip with both hands on the saw

and position your body and arm to allow you to

resist KICKBACK forces. KICKBACK forces can be

controlled by the operator, if proper precautions are

taken.

When blade is binding, or when interrupting a

cut for any reason, release the trigger and hold

the saw motionless in the material until the blade

comes to a complete stop. Never attempt to

remove the saw from the work or pull the saw

backward while the blade is in motion or KICK-

BACK may occur. Investigate and take corrective

actions to eliminate the cause of blade binding.

When restarting a saw in the workpiece, center

the saw blade in the kerf and check that saw

teeth are not engaged into the material. If saw

blade is binding, it may walk up or KICKBACK from

the workpiece as the saw is restarted.

Support large panels to minimize the risk of

blade pinching and KICKBACK. Large panels tend

to sag under their own weight. Supports must be

placed under the panel on both sides, near the line

of cut and near the edge of the panel as shown in

Fig. 1.

To minimize the risk of blade pinching and kickback.

When cutting operation requires the resting of the

saw on the workpiece, the saw should be rested on

the larger portion and the smaller piece cut off.

Fig. 1 To avoid kickback, do support board or panel near

the cut.

Évaluation

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