Adjusting (Fig. 4-5-6-7-8) - Hitachi C 12YA Handling Instructions Manual

Pay careful attention to the ideograms printed on the box
as they provide all necessary information for palletization
and stacking of boxes.
Tying the load down with ropes or safety belts is
recommended during transportation to stop the load from
sliding or falling.
2.4 POSITION/WORK STATION (Fig. 2-3)
Place the machine on a work bench or on a suffi ciently fl at
base/pedestal to ensure the best possible stability.
Should you wish to fix the machine in place, use the
special holes located on the base. These are available as
an optional.
Bearing in mind ergonomic criteria, the ideal height of the
bench or of the base should be such that the base surface
or the upper work surface is between 90 and 95 cm. from
the ground (see fi g. 2).
Always ensure that there is at least 80 cm. of manoeuvring
space in all directions around the machine in order
to perform all necessary cleaning, maintenance and
adjustment operations safely with a suffi cient amount of
space available (see fi g. 3).
CAUTION: Ensure the machine is placed in a
suitable position both in terms of environmental
conditions and lighting.
Always bear in mind that general environmental
conditions are of fundamental importance to
prevent accidents.
2.5 ELECTRICAL CONNECTIONS
Check that the electrical system to which the machine is
connected is earthed in compliance with current safety
regulations and that the current socket is in perfect
condition.
The electrical system must be fi tted with a magnetothermal
protective device to safeguard all conductors from short
circuits and overload.
The selection of this device should be in line with the
following electrical specifi cations of the machine stated
on the motor.
NOTE: Your mitre-saw's electrical system is
equipped with an undervoltage relay which
automatically opens the circuit when the voltage
falls below a minimum pre-established limit and
which prevents the self-reset of machine functions
when voltage returns to normal levels.
If the machine stops involutarily, do not be
allarmed. Make sure that there has not been a
voltage failure in the electrical system.
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ADJUSTING (Fig. 4-5-6-7-8)

WARINING: All the adjustment procedures
illustrated below must be performed when the
machine's engine is off.
3.1 ADJUSTMENT OF CUTTING ANGLE-HEAD
ROTATION (Fig. 4)
This mitre-saw can cut both to the left and to the right.
The pre-set positions are: 15° - 22°30' - 30° and 45°.
To position the machine as above, loosen knob 20, release
the machine head by pushing the lever 21 downwards and
rotate the rotary support by using the handgrip 1.
The head stops automatically each time the pointer 22
is aligned with the corresponding position etched on the
graduated scale of the rotating plate.
For all intermediate positions, once the index is in alignment
with the position on the plate, block the rotating bearing by
means of the knob 20.
CAUTION:Do not remove the Movable upper
safety guard in use.
Also, do not use with the state opened and leave
it opened.
3.2 ADJUSTMENT OF CUTTING ANGLE - HEAD
ANGLE (Fig. 5)
The machine head can be tilted to a maximum of 45° to the
left. Release the knob 24 (on the rear part of the machine)
and tilt the head until it comes to rest on the stopper at an
angle of 45° (already calibrated during testing). Retighten
the knob 24 to securely block the head in place. For all
other intermediate positions, align index 25 on the rear of
the head with the corresponding position marked on the
graduated scale 23 of the swivel joint (Fig. 16).
WARNING: During double angle cutting (rotation
plus head tilting) hold the work piece securely to
the machine using the right hand and guide the
lowering of the head with the left hand (Fig. 16).
3.3 ADJUSTMENT/INSTALLATION OF STOPPER
(STANDARD ACCESSORY) (Fig. 6)
To cut work pieces of the same length, use the stopper in
order to avoid repeating the same measuring procedure
more than once.
Screw the bar 26 into the hole in the base and block it with
the dowel 27: loosen the handwheel 28 and position the
clamp 29 at the appropriate distance from the blade; then
tighten the handwheel 28.
3.4 ADJUSTMENT HEIGHT OF UPPER WORK
SURFACE (Fig. 7)
JUST FOR CIRCULAR SAW
WARNING: When working on the upper surface, it
is absolutely necessary to install the lower safety
guard supplied 117 (Fig.. 15).
To install the safety guard with the head uplifted, place it
on the angular bearings 30 of the base. Then lower the
head and block the body in this position by means of the
block pin 19.
To adjust the height of the upper work surface to obtain
desired cutting widths, follow the instructions below:
– loosen the two handwheels 32;
– move the bearing bracket 17 toward the blade;
– lower or lift the work surface using knob 53.
– tighten the handwheels 32;
3.5 ADJUSTMENT OF BEARING BRACKET (Fig. 8)
JUST FOR CIRCULAR SAW
For cutting planks of the required size, it is possible to adjust
the distance of the support square 17 from the blade. Loosen
the knob 37 and slide the square 17, until the set measurement
has been reached (this can be read on the graduated index 38
found on the worktop). Finally retighten the knob 37 bearing
in mind that the position indicated by the square on the index
corresponds to the actual distance from the cutting surface
of the blade.
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