- -tn_
n.
:hll-~1';.£r:~-m.~m-+•~-~-~;;'*{~
~w
c~mzs)
I
The
position
of
the
tbread-am?unt
adjusting
plate
~
11C~'f
I
~~
IJPJ
1117--"'P'J
M...EI..
13:
1
of
the
thread
take-up
lever
(F
ig.28)
0028
Fig.28
tt-fft£/!fij;,.:.\01",
~o
(
002
8),1Jr~.
Jfl1j~~ff~itiAI'TH.!it§
ttW~.~#~-W~M.
00~~~~*0
~*
·
~fft£&~~~.~~~-oo~~~~~m.
a~
«Rm•&~amM.
~re~•~~-~~-~4
o
The
th
read-amount
adjusting plate will retain the bobbin
at
thread when the needle bar is the bottom dead centre; in such a way
the loop
of
the needle thread is to become bigger when the needle
thread is hooked.
In
addition to the foregoing there is afunction
of
the tight pulling
of
the needle thread loop. The t!U'ead-amount adju-
sting plate usually reduces to the lowest point when
a thread fin
er
than normal is used.
Note
that take-up thr
ea
d tension lever
is
another name for thre-
ad-amount adjusting plate.
~
-t1i.
t=f:tliiJ
~~:#;J(f!l29)
I Frame thread eyelet (Fig.29)
0029
Fig.29
1ft
fal
~~¥!1EI'.J{
l'
tJ'f-tl!**~'Jll;j~tf-:EW.ftt~~.
-
M:reBIJ.fft
m:
1'F:Y9
~lft(0029)
fill
~#80-
#
50
tt
~
#
30-
#
20
1-tJf~#80-
#
50
1{.;-f~#30-#20
~~=t
J
al~~~~'Jlt2-3
1ft
i
hT'il'~~~Jlt3
-
4
1ft
l
ill.'i)<~iiJ~
J
.
rlt
1-2
rp
IBJ.'i)<
~iiJ~Jll2-
3
The improper-positioning
of
the frame thread eyelet my be the cause
of
occurrence
of
skipping stitch.
The following locations are generally regarded as criteria (refer to Fig29)
Cotton
thread#
8Q---
#
5Q
Graduation marked on the frame thread eyelet
2-3
Cotton thread#8Q-#
5Q
Thread
of
chemical fibre #
80-
#50
Thread
of
chemical fibre #
80-
#50
Graduation marked on the frame thread eyelet 3-4
Graduation marked on the
fr
a
me
thread eyelet 1-2
Graduation marked on the frame thread eyelet 2-3
-
-t
,\,
t
l·:fit'f.J~~(f!l30)
I Replacement
of
throat plate (Fig.30)
0030
Fig.30
#~liill'f!
Stitich length
lft-tt-~~tJ
La'.J
tUJi:±l
/:f>"FiftJ!i'.~:YiJl/
4" (6. 4mm)o (0030)
&~~
.
~
l
al~r:!lB!'~II'IJM!fiJ!~:
1.
tt-:'.IE
2.
tt.ffin~
3.
# 4,
ili~Hf
s.
~i;IJ:fll#tr
6,
Off
:iti
fi
ft
Vf
t
~
'_fll
:tJ
~tj-1:£
l/
8
II
-1/2
II
tf-
fi
~
Ji!.~
Z
I*J
ljj):@}ij o
tt-fi m !Jt*
Hot
,
r¥f-
1:~
~
f45'~:ili
!fi
V~H!MiHli
;fo
8 ~
iT£
o
The sandard size
of
the throat plate
in
parts book, which is
stipulated by the manufactory, is
1/4", equivalent to 6.4mm. (Fig.30)
The replacement of the fo
ll
owing components is ususlly needed
at the time when changing the gauge
of
double-row thread stitch.
-11-
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