Hitachi C 12LSH Technical Data And Service Manual page 76

Item
Phenomenon
2 Rough cut surface
Parallelism = 0.02/54
A
Fig. 82
Cause (s)
a Large deflection of
saw blade.
(Causes rough cut
surface.)
b Poor movement of
slide pipe section
prevents smooth
cutting.
c Excessive clearance at
the slide pipe section.
d Surface parallelism of
washers (A) or washer
(B) are inaccurate due
to surface defects
such as impact marks
and scratches.
e Improper slide cutting
technique.
f Inaccurate squareness
between turn table
and saw blade,
causing saw blade to
cut at an improper
angle and make
cutting marks.
g Excessively fast
cutting speed.
h Improper clamping of
workpiece.
i Turn table is not fixed
with side handle.
Loose fitting of
j
swiveling portion of
hinge and gear case,
or sluggish movement.
k Cutting operation
becomes sluggish
because workpiece is
warped or bent.
l Excessive vibration
Factory
standard
0.2/ φ 295
(Dummy disc)
Slide load should
be within 3 kgf.
------
0.02/54
(Fig. 82)
------
0.15/100
(Fig. 77)
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Inspection, repair or adjustment
• Same as Item 1- b .
• Apply machine oil to the slide
pipe section.
• Check the slide pipe section for
any scratches or the like.
Repair as necessary.
• Readjust the Bushing [143].
• Replace Slide Pipe (A) [149],
Slide Pipe (B) [166] or Ball
Bushing [144] as necessary.
• Repair impact marks or
scratches at Washer (A) [287]
or Washer (B) [285B].
• Replace them if necessary.
• See paragraph 8-7 "(4) Slide
Cutting." Do not apply
unnecessary force for
successful slide cutting.
• Same as Item 1- a .
• Reduce cutting speed.
• Properly clamp workpiece with
Vise Ass'y [37].
• During cutting, fix the Turn
Table [26] in position with Side
Handle [92] without fail.
• Same as Item 1- h .
• Correct warp or bend with
planer.
• Recheck items a , c , d and
i .