No.
8.
*~
m
~u~~~
;re
l~~
Problem
The
fabric
is puckering
9.
~fm1'~
Improper
stitch
10.
*iffi~t±H~~t3L
There is needle hole on
the
fabric
tn~&~~
Exam and Adjustment
4
.J.It~JB1J:;t:;*;::~:;t/j\
0
The presser foot pressure is too strong
or
too weak
©
ii~HJa.J
g
It~
IUJ
o
Adjust the presser foot pressure properly.
5.
~*'1~jJ{~~
0
The sewing speed is too fast.
©~f~guJ~jJ{
o
Decelerate the sewing speed.
l.JR~*H*IB1'-~
0
The thread thickness is different.
©B(Ff.U~~~~~~
0
Change to use the better thread.
2.
~JRHif'F1'.IEm"
o
The thread gripper
is
abnormal.
©~ll*~~Hw~m
I
ff~~~~~~~
o
Clean the thread waste on the thread gripper
to
I
make the thread crossing smoothly.
3.j§~H~[l1'.IElii
o
J
~he
locating of thread crossing is incorrect.
©~~fi~'~fi~&k~fi~~~1Jo
Adjust the tension of needle thread, looper thread
and up
looper thread.
4.j§~~1'J~Gm
o
The thread crossing hole
is
not smooth.
©fflfi'J>it~~7JI~WJJI6j§~~
o
Use emerypaper or file to polish the thread crossing
~
h
_
ol
~
e
~
·
~~~~~----------
----------~
1.m~t~t~w~~ie=E
o
The needle tip is blunt.
©~t~Ul!~t
o
Replace the needle.
l
2.
~-m~tt~
I
m~t:;tm
o
The needle which compares with fabric is too thick.
©~m
~*lllm~t
o
Replace with the fine needle.
1
3.~t~k~~t;R.:;t'J'~em
o
The needle hole on the needle plate is
too
small
or
worn out.
©~~tt-&~f~lllm
o
Rounding and smooth the needle plate hole.
-42-
From the library of: Superior Sewing Machine & Supply LLC
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