Hitachi C 10FM, Technical Data And Service Manual

Page: 23 / 32

--- 21 ---
g Excessive
misalignment of the
base and the table
causes the saw blade
to cut into the
workpiece at an angle.
h Loose fitting of
swiveling portion of
the upper arm and the
support or sluggish
movement. As a
result, components
may be deformed
because of unstable
upper arm or because
the operator must
apply excessive
pressure during
operation.
i Excessively fast
cutting speed causes
deflection of the saw
blade and inaccurate
cutting.
j Excessive cutting
force (pressure) is
required because of
dull saw blade.
k The workpiece moves
during cutting because
it is bent or deformed.
a Large deflection of the
saw blade. (It causes
rough cut surface.)
b Each surface
parallelism of the
arbor collar is
inaccurate due to
surface defects (such
as impact marks and
scratches).
c Inaccurate
squareness between
the table and the saw
blade, causing the
saw blade to cut at an
improper angle and
make cutting marks.
1
(Continued) 0.45 (0.018")
0.1 (0.004")
(Fig. 21)
------
------
------
------
0.38/220
(0.015"/8-21/32")
(Dummy disc)
0.025/54
(0.001"/2-1/8")
(Fig. 22)
0.4/100
(1/64"/3-15/16")
(Fig. 17)
• Replace the Base [59] and/or
Table [64] if deformed.
• Check the fitting surfaces of the
Upper Arm [86], Support [39]
and the Shaft [36] for any
foreign substance (such as
cutting dust), and remove it as
necessary.
• Reduce cutting speed.
Appropriately 10 seconds for a
square wood workpiece of
60 mm (2-3/8").
• Sharpen the TCT Saw Blade
[701] again.
• Correct bend, flex or other
deformation by planing and try
cutting.
• Same as the Item 1- b .
• Repair impact marks or
scratches at the Arbor Collar
[52] or replace it if necessary.
• Same as the Item 1- a .
Fig. 21
2 Rough cut surface
Parallelism A = 0.025/54
(0.001/2-1/8")
--
+
Fig. 22
Arbor collar Arbor collar
Item
Phenomenon
Cause (s)
Factory
standard
Inspection • Repair •
Adjustment
Base
Table