Femi 784 XL Mode D'emploi Et Entretien page 12

4 USE
4.1 RUNNING IN THE BLADE
ATTENTION: If the correct running in procedure
is not performed, the blade's cutting precision
may be irreparably compromised.
To obtain the best performance, the bi-metal blades fi tted on
your saw ing machine must be run in for a short period. For
this reason the fi rst two or three cuts should be done where
possible on a solid piece D.40-50 mm, using a very slight
pressure on the blade, and gradually increasing pressure
in subsequent cuts. To gauge the correct pressure in normal
operating conditions defi ned by this manual (see cutting
table), consider for example that the fi rst cut on solid steel
(eg. C40) D.50 mm should be done in about 4 minutes.
After running-in, the same piece may easily be cut in about
2 minutes. If the running-in process is done correctly, the
fi nish and precision of the cut will be of better quality and
the blade will last longer.
4.2 WORKING (Fig. 7)
Turn the main switch to position 1: in doing the switch comes
on and machine is ready for operation.
ATTENTION: Before starting any cutting
operation, check that all the protections are
complete and in the correct position.
Once you have completed all the procedures and operations
described so far, you may start the working processes.
To perform the cut, move to the front of the machine and
grip the hand grip with your right hand.
ATTENTION: Keep your left hand away from the
cutting area and on no account try to reach it
when cutting is in process.
Using the index fi nger of your right hand, press the run
button A (Fig. 4) and gradually lower the machine body until
it comes lightly into contact with the part to be cut.
Now begin to apply gradual pressure on the part and
complete the cut.
ATTENTION: Always release button A between
one cutting operation and another, while you are
positioning the part. do not try to block it or alter
its functional characteristics in any way.
If the machine suddenly stops after numerous consecutive
cuts, do not be alarmed.
The heat protector device of the motor has been activated,
breaking the power supply when the temperature of the coils
reaches the threshold limit defi ned by the insulation class,
to prevent damage to the motor.
In this case, release the button A and wait for automatic reset
which usually takes place after a few minutes.
Your sawing machine is equipped with an electronic speed
governor which also includes a motor protection function
10
obtained by means of an amperometric limiter. In this way
can not absorb an amount of current greater than the
set one, expressed by the maximum value of absorption
(see 2.5).
If the limiter trips while the machine is in operation, slightly
decrease the cutting pressure in addition, this enables
to safeguard the blade life and performance and to obtain
always a sharp and clean cut.
4.3 REPLACING THE BLADE (Fig. 9)
CAUTION: When you perform this operation,
always wear protective gloves to avoid contact
with the teeth of the blade.
- check that the main switch is at position 0;
- slacken the handle Q and slide the blade guide P as far
as it will go, following the direction on the arrow (Fig.
8);
- remove the protective casing unscrewing the four
screws;
- slacken the blade tension, turning the handwheel B in
a anti-clockwise direction;
- using a 10 mm. spanner, slacken the exagonal nuts
R on the two blade guides on the outside of the blade
(Fig. 9);
- with the same spanner gently turn the head of the screws
on the same blade-guide in a anti-clockwise direction so
as to move the bearings far enogh away from the blade
to enable you to extract it easily from the guides;
- extract the blade fi rst from the guides and then from the
rubber coated pulleys;
- insert the new blade fi rst between the guides and then
onto the rubber coated pulleys, with the teeth facing as
showed in picture 9;
- put the blade under tension again as described in point
3.1 and reposi tion the two outer blade guides in slight
contact with the blade, turn ing the head of the screws
S in a clockwise direction;
- lock the two exagonal nuts R again;
- replace the protective casing, being careful to insert the
blade between the straps of the protection T;
- reposition the blade guides P in the correct position for
the next cut.
4.4 CUTTING CAPACITY (Fig. 10)
The table below specifi es the cutting capacity at 0 and 45
degrees which may be obtained in normal conditions of
use described in this manual and without placing any other
object between the jaws of the clamp.