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No.
!~~
m~J.SH)ij]~
Problem
Exam and Adjustment
8.
*lffi~JI~
4.
~~~J.J
:A::*:§.JG::tJJ\
0
The fabric is puckering
The presser foot pressure is too strong or too weak
©~~~~~~~J.Jo
Adjust the presser foot pressure properly.
s.
~~~M~,t~
o
The sewing speed is too fast.
©~f~m~~M
0
Decelerate the sewing speed.
9.
*lm1'm
1.
~B'SJ*.El*IB1'-~
o
Improper stitch
The thread thickness is different.
©auf.!
~ ~:r
B' S J
~ ~
0
Change to use the better thread.
2.
~~~Ifl1=1'IEm"
o
The thread gripper is abnormal.
©~ll*~~~~~m
•
@~~stZJII~
0
Clean the thread waste on the thread gripper to
make the thread crossing smoothly.
3.~~~~fi11'IE~
o
The locating of thread crossing is incorrect.
©~~fi~'~fi~&k~fi~B'SJ~J.Jo
Adjust the tension of needle thread, looper thread
and up looper thread.
4.~~~1'Jl6)~
0
The thread crossing hole is not smooth.
©fflWP~lt§.JG~JJI~~Jlt~~~
o
Use emerypaper or file to polish the thread crossing
hole.
10.
~
ffi
~ l:±:l!~ ~t ~
I.m~t~t~Wf!H9.JG~=E
0
There is needle hole on the fabric
The needle tip is blunt.
©~~m~t
0
Replace the needle.
2.
oo~ffi~tt~. m~t::t:m
0
The needle which compares with fabric is too thick.
©~m~*mm~t
o
Replace with the fine needle.
3.~tif&k~~t~:A'J'9.JGIH~
o
The needle hole on the needle plate is too small or
worn out.
©ffi~t~.&~f~~)~
0
Rounding and smooth the needle plate hole.
-42-
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