No.
m~
m~EHJ~~
Problem
Exam
and
Adjustment
4.
liT~
6.~~t
'~jt
'jt~
'!t~~
'~~JL~~~~~
Thread
broken
=E~9.X~~U1J!!Ji~
0
The needle, looper, needle plate, presser foot
tongue and thread crossing hole is blunt
or
scratching.
©
~~E9.X~WM~M&E·9.X~~-~~o
Use oilstone or fine emerypaper to polish or
replace the parts.
?.*it~~m~ffi~~~m~~~
o
Sewing the heavy material cause the thread
winding.
©
~g•s~•·•m~~~gft&~-~~-
0
Decelerate the sewing rotational speed and
applying silicon
oil to lower the friction temperature
between needle and thread.
5.
IIJT~t
1.
mjtt:rsJmt~1'~
o
Needle
broken
Choose the wrong needle.
©affi~::f~~ftJLErSJm~~·~fflm-~ErSJ~fto
Use
thick
needle within the range that there will be
no pinhole occurred on the fabric.
2
.~~~~1'~
0
Improper assembling
of
the presser foot.
©~R~@E~ffl~ft~~~~~mft~~~o
During assembly, make sure the needle can insert
to the central point
of
the presser foot.
3.~~~-f§]g[I&::f!~
0
The assembling height
of
feed dog is wrong.
©~~~~frSlf§J~
•
~~~~~t~o.a-1
mm,
!&]~
f~H~@=~~~1J
o
Adjust the feed dog height to make the feed teeth
in
0.
8-1
mm higher that the needle plate and keep
the appropriate presser foot pressure.
4
.
fi~1'~
0
Bad threading o
©~~~S~~~~m~~~-
·~MW~
o
If there is any connecting part
of
the thread,
it
needs to be dealt first. Then, threading.
5.
~~t~•::f'IE~
o
Improper needle installing.
©~-~~IE~~-~~
·~B~R
o
Install the needle correctly
by
following the
instruction book.
6.
m
~t
!taB
9.X
~t
~
ltfi
R
~
=E
9.X
jt
JL
fRl
ti
a:
o
The needle is bent, the needle
tip
broken, or the
needle hole is blocked.
©~~-~t
0
Replace the needle.
-39-
From the library of: Superior Sewing Machine & Supply LLC
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