+
!\..,.
~ft*H~f)Lft(J9~~(0023)
I The timing
of
looper in reference to needle (Fig.23)
0023
Fig.23
mtta•~~at.~ttm~am.•~oo~m~~¥-J•nm
fi
1"1
tviffil~(-tln
0023)0
The looper shall be moved backward to the lowest position
while the needle is at the bottom dead centre; loosen the screw on
the gear and make timing adjustment
of
the looper in relation to the
needle (refer to Fig 23.)
+11,.
~ftB9-t.Jn:E:C0024)
I Thread-guiding amount
of
the looper (Fig.24)
1,
~tti¥-Jtt~~~J:ititrttti¥-J!=f•l)fll:JiB>t,
~tttt~~*JLtf":fLJ:ltffiii¥-J~E~tT-<lfi:J!:2mm,
!ltB>tttffr~IJ~~ottff
r~t~rliffiloox.J1f
0
ctmrB24)
2,
~tti¥-JJ§miH'.J3.5mmo
3,
fJLtt:fL~o~tt:fLI¥-JfBX>f*
~
-tln(rB24)PJf~
o
(li:1i~tt
PI
LV,
Jt~ljiffil~)
1)
The standard value
of
the vertical distance
of
the point
of
the looper away from the upper end
of
the eye
of
the
needle is 2mm, then the graduation mark on the lower part
of
the needle bar shall be in line with the lower end
of
the
needle bar bushing, lower.(refer to Fig.24)
2) The value
of
the stroke moved backward by the looper is about 3.5mm.
3) The relation between the eye
of
the needle and the eye
of
the looper is indicated Fig.24.
(Note that the left Ioper and the right one can be sepatately adjusted.)
0024
Fig.24
2mm
~]
,_[
=
+,.
~ftf;n;f;)Lftfii)(J9(ii]~t
I The clearance
of
looper and needle
**•~~m.mtt~~ttoo@m~
-
~oog,
~m~m~ffimtt.mtt~~@m~~**~o~*oog
t/J\
7.
mtt~¥-Jimtloo
Ei~tttt~~~~*B!LTitttirmtJJlf%
0
After adjusting the needle guard, the clearance
of
a given value between the needle and the looper shall be kept
unchanged; the needle shall not touch at the point
of
the looper when it
is
pressed down softly.
If
the clearance
is
narrower
that usuaL the side
of
the needle and the point
of
the looper are apt to incur breakage due to the impact
of
the needle side
against the looper point.
-9-
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