Hitachi C 12LSH Technical Data And Service Manual page 67

Item
Phenomenon
2 Rough cut surface
Parallelism = 0.02/54
A
Fig. 89
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
--- 63 ---
Factory
Inspection, repair or adjustment
standard
• Same as Item 1- b .
0.2/ φ 295
(Dummy disc)
Slide load should
• Apply machine oil to the slide
be within 3 kgf.
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.
0.02/54 • Repair impact marks or
(Fig. 89)
scratches at Washer (A) [287]
or Washer (B) [285].
• Replace them if necessary.
------ • See paragraph 8-7 "(4) Slide
Cutting". Do not apply
unnecessary force for
successful slide cutting.
0.15/100
• Same as Item 1- a .
(Fig. 84)
------
• 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 .