Hitachi Koki C 12RSH2 Mode D'emploi page 37

○ Be absolutely sure to remove the cut material from the
top of the turntable, and then proceed to the next step.
○ Continued cutting operation can result in overload of the
motor. Touch the motor and if it's hot, stop your cutting
operation once and rest for 10 minutes or so, and then
restart your cutting operation.
9. Cutting narrow workpieces (Press cutting) (Fig. 19)
Slide the hinge down to holder (A), then tighten the
slide securing knob (Fig. 2). Lower the handle to cut
the workpiece. Using the power tool this way will permit
cutting of workpieces of up to 107 mm square.
10. Cutting large workpieces (Fig. 20, 21)
There may be case when a complete cutting cannot be
done depending on the height of workpiece. In this case,
mount an auxiliary board with the 6 mm fl at head screws
and the 6 mm nuts using the 7 mm holes on the fence
surface (two holes on each side). (Fig. 20)
Refer to "SPECIFICATIONS" for the thickness of the
auxiliary board.
NOTE
When cutting a workpiece exceeding 107 mm in height
in right-angle cutting or 70 mm in left bevel angle cutting
or 45 mm in right bevel angle cutting, adjust the lower
limit position so that the base of the motor head will not
come in contact with the workpiece.
To adjust the lower limit position of the saw blade, follow the
procedure (1) shown in Fig. 21.
(1) Lower the motor head, and turn the 8 mm depth
adjustment bolt and make adjustments so that there can
be a clearance of 2 mm to 3 mm between the lower limit
position of the motor head and the top of the workpiece
at the saw blade's lower limit position where the head of
the 8 mm depth adjustment bolt contacts the hinge.
11. Cutting wide workpieces (Slide cutting) (Fig. 22)
(1) Workpieces up to 107 mm high and 312 mm wide:
Loosen the slide securing knob (A) (Fig. 2), grip the
handle and slide the saw blade forward.
Then press down on the handle and slide the saw blade
back to cut the workpiece. This facilitates cutting of
workpieces of up to 107 mm in height and 312 mm in
width.
(2) Workpieces up to 120 mm high and 260 mm wide:
Workpieces of up to 120 mm in height and up to 260 mm
in width can be cut in the same manner as described in
paragraph 15-(1) above.
CAUTION
○ When cutting a workpiece of 120 mm height, adjust
the lower limit position of the motor head so that the
gap between the lower edge of the motor head and the
workpiece will be 2 to 3 mm at the lower limit position.
○ If the handle is pressed down with excessive or lateral
force, the saw blade may vibrate during the cutting
operation and cause unwanted cutting marks on the
workpiece, thus reducing the quality of the cut.
Accordingly, press the handle down gently and carefully.
○ In slide cutting, gently push the handle back (rearwards)
in a single, smooth operation. Stopping the handle
movement during the cut will cause unwanted cutting
marks on the workpiece.
WARNING
○ For slide cutting, follow the procedures.
Forward slide cutting (toward the operator) is very
dangerous because the saw blade could kick upward
from the workpiece. Therefore, always slide the handle
away from the operator.
○ Always return the carriage to the full rear position after
each crosscut operation in order to reduce the risk of
injury.
○ Never put your hand on the side handle during the
cutting operation because the saw blade comes close to
the side handle when the motor head is lowered.
12. Miter cutting procedures
(1) Loosen the side handle and pull up the lever for angle
stoppers. Then, adjust the turntable until the indicator
aligns with desired setting on the miter scale (Fig. 23).
(2) Re-tighten the side handle to secure the turntable in the
desired position.
(3) The miter scale indicates both the cutting angle on the
angle scale and the gradient on the grade scale.
(4) The gradient, which is the ratio of the height to the base
of the triangular section to be removed, may be used
for setting the miter scale instead of the cutting angle, if
desired.
Therefore, to cut a workpiece at a grade of 2/10, set the
indicator to position.
NOTE
○ Positive stops are provided at the right and left of the 0°
center setting, at 15°, 22.5°, 30° and 45° settings.
Check that the miter scale and the tip of the indicator are
properly aligned.
○ Operation of the saw with the miter scale and indicator
out of alignment, or with the side handle not properly
tightened, will result in poor cutting precision.
13. Bevel cutting procedures (Fig. 24)
(1) Loosen the clamp lever and bevel the saw blade to the
left or to the right. When tilting the motor head to the right
pull the set pin (A) towards the rear.
The clamp lever adopts a latchet system. When
contacting the work bench and the main body, pull
the clamp lever in the direction of the arrow mark as
illustrated in Fig. 24, and change the direction of the
clamp lever.
(2) Adjust the bevel angle to the desired setting while
watching the bevel angle scale and indicator, then
secure the clamp lever.
WARNING
When the workpiece is secured on the left or right side
of the blade, the short cut-off portion will come to rest
on the right or left side of the saw blade. Always turn the
power off and let the saw blade stop completely before
raising the handle from the workpiece.
If the handle is raised while the saw blade is still rotating,
the cut-off piece may become jammed against the saw
blade causing fragments to scatter about dangerously.
When stopping the bevel cutting operation halfway, start
cutting after pulling back the motor head to the initial
position.
Starting from halfway, without pulling back, causes the
lower guard to be caught in the cutting groove of the
workpiece and to contact the saw blade.
CAUTION
When cutting a workpiece of 75 mm height in the left 45°
bevel cutting position or a workpiece of 50 mm height in
the right 45° bevel cutting position, adjust the lower limit
position of the motor head so that the gap between the
lower edge of the motor head and the workpiece will be 2
to 3 mm at the lower limit position (refer to "11. Checking
the saw blade lower limit position" on page 35).
14. Compound cutting procedures
Compound cutting can be performed by following the
instructions in 12 and 13 above. For maximum dimensions
for compound cutting, refer to "SPECIFICATIONS" table.
CAUTION
Always secure the workpiece with the right or left
hand and cut it by sliding the round portion of the saw
backwards with the left hand.
It is very dangerous to rotate the turntable to the left
during compound cutting because the saw blade may
come into contact with the hand that is securing the
workpiece.
In case of compound cutting (angle + bevel) by left
bevel, slide the sub-fence (B) outward, and engage in
the cutting operation.
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