Femi NG 120, Instructions For Use And Maintenance Manual

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EN
10
Slacken the knobs Q and slide the blades guide P so as
to move it closer to or further from the part to be cut, as
shown in the fi gure.
ATTENTION: if this adjustment is not done, the
part of the blade not used in the cutting process
will be exposed and this will create an extra risk
of contact, besides altering the quality of the
cut.
3.6 BEARINGS BLADE GUIDE (Fig.9)
The blade-guide on the outside of the sawing machine are
eccentric and adjustable so as to simplify blade replacement
and to keep it guided as its best.
They must always touch the blade slightly, so that they
rotate when the blade passes, but must not be completly
locked.
In order to approach or remove the eccentric blade-guide,
gently turn the head of the screws
R using a 10 mm.
wrenches key.
4 USE
4.1 RUNNING IN THE BLADE
ATTENTION: if the correct running in procedure
is not performed, the bladès cutting precision
may be irreparably compromised.
To obtain the best performance, the bi-metal blades fi tted
on your sawing 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 Ø 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 defined by this manual (see cutting table),
consider for example that the fi rst cut on solid steel (eg.
C40) Ø 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 D to position 1 : in doing the switch
comes on and the 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 handgrip 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.
Use your right-hand thumb to press the side release button
B (Fig. 7) : as such you will disable the safety system that
prevents any unintentional starts. Then use your right-
hand forefi nger to press start button A and lower the body
gradually until the blade lightly touches the work piece 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 obtained by means of an amperometric limiter.
In this way it 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 D (Fig. 7) is at position 0 ;
- slacken the handles Q and slide the blades 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;
- 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 (Fig. 9) ;
- put the blade under tension again as described in point
3.1.
- replace the protective casing;
- reposition the blade guides
P in the correct position for
the next cut.
ATTENTION: This machine has been developed
for working with the blade rotating clockwise
(Fig. 9).
It is absolutely necessary to check that the blade
is produced according to this rotation mode.