No.
m~
I
m~JSH1~~
Prob
l
em
Exam
and
Ad
j
ustment
2.
£t~ftillS~~~~
o
,
8.~jt7f'~Bf±:EifHljtfi5J~~
·
~,5X~jt~Fi5J:E
The
skipping
stitch
of
needle
thread
il~~~~jt
0
The
looper can't hook the right needle thread loop
1 and cause the right stit
ch
of looper thread skipped.
©
±:~~~jf**l!t;;t'J'
•
iftDD~~~-
o
Because the needle thread loop
is
too small which
increase the thread take-up amount.
9.
~
jf
1'
fftl
B
f±
~
iA
~
jf
Fi5J
**
Ii
· ~
.5X
~
jt
~
Fi5J
~
iA
~m~t*t
o
The
looper can't hook the left needle thread loop
and cause the left stitch of looper thread skipped.
©
±:~~~jt~ltt;;tl\:
'
~g)-~~~
-
0
Because the needle thread loop
is
too big which
decrease the thread take-up amount.
1 o.
~
*t~
;n
~
tt
q:t
rdl
w
~
il
~ *t
~
~~t
. ~ *t
~
Fi5J
q:t
jt~W~*t**~~~
t
o
The
looper can't hook the middle and left straight
needle thread loop
wh
i
ch
cause the middle and
left stitch of looper thread skipped.
©
~~-~~~tiW~fifi5J~~g~.~~fi~~
j;;:Jj\~=
0
Accordi
ng
to the standard to adjust the looper
thread connection between needle and looper and
make proper
needle thread loop size.
11.~*tmtm~ttq:trdlfi:Eil~*t~~
•
~*t~fi5Jq:t
jt
~Hf@
:E
jt
**
~~
jt
o
The
looper can't hook the middle and right straight
needle thread loop and cause the middle and
right stitch skipped.
©
m~M~~a~~~~**H·~~~~Fi5J~~M
~
•
~rc~~~~-iifJ~~
o
Check
if
the
thread
pass
through
the
thread
gripper
and the
synchronization
relationship
of
thread
controlling
cam
. If
there
is
any
problem,
adjust
it
according
to
the
standard.
12
.
~~tW~*tlic~1'=
o
The
looper
and
needle
didn
't
cooperate
well.
l
©
m~~t~~M
.
m*t~~~t2fMlfi5J~~
o
Check
the
needle
lever
height
and
the
synchronization
between
needle
and
looper.
13.!fijtW~jt
J=lftC.
~1'=
o
The
needle
and
the
needle
guard
plate
didn't
cooperate
well.
-37-
From the library of: Superior Sewing Machine & Supply LLC
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