3.
Not line
Possible reasons: the bottom line run out7 threading mistakes, needle wear the wrong
or didn't reach the position, needle bending deformation, cloth js not suitable {too thjck] too
thin, too soft or too hard), needle is not sta`ndard.
Solution: replace the bobbin of the bottom line, replace the original 90/14 # machine
needle,install needle correctly and tighten thimble screw , replace the right fabrics,
replace sewing thread of the original factory .threading this needle in the right direction,
the needle must be through from left to right direction.
4 . B re a k
Possible reasons: line is too tight, the line button is too tight, fabric is not appropriate
(too thick and too hard), sewing thread is not suitable, without turning the handwheel
before booting, threading is not correct, needle is not standard, the bottom line after the
bobbin stu'ck wire, broken needle bobbin sets have burrs, hook plate have burr, pinhole
have burr or partial needle, needle is not in place, the thread clamp, threading spring or
receive pole threading have burr.
Solution: relax the line button, replace the bobbin, replace the standard 90/14 #
machine needle of the original factory ,installed needle correctly and tighten thimble screw ,
replace the right fabric, replace the sewing threadthe of original factory, thread in the
right direction again, must go through the needle from left to right direction ,reduce burr
with fine sandpaper to make it smoothly. operating the machine Correctly.
5.Badline thebottom line ,
Possible reasons: the bobbin of line is stucked, the bobbin of the bottom was stucked,
line is too tight or too loose, needle is bending deformation, threading position is wrong or
inappropriate , cloth is not inapprocpriate (too soft and thin).
Solution: install cover line core then pull back, make the bobbin of the line operating
f[exiablly, coordinate face line elastic adjustment knob, make the bottom line even,
replace needlf and thread again, change the sijitable fabric,.
6.Firing pin, needle breakagepossible reasons: loose presser foot, needle loose ,stitching
line button too close, boot when needle is enter into fabric,needle not lab, pull when they
leave.Stay without turning the handwheel, shuttle back and forth after the core set of shift
and tie line or lines did not handle but turn the handwheel or boot.Needle is not installed ,
needle is loose.
Solution: replace and correct to install machine needle and tighten the thimble Screw,
relaxed line button, replace comfortable fabric, adjust the bobbin cover location, operate
the machine corectly.
7.Can't turn the handwheel
Possible reasons: it doesnot handle aftertje line or lines, line i§ bad orjammed, line
button too close, needle bending deformation, displacement, the bobbin presser.
Solution: replace and install machine needle correctly , tighten the thimble screw,
threaden and relaxed line right button again, adjust the bobbin set position, set the bobbin
positlon be reference (A-C) -
ThebobbinsetNormalposition Thebobbinsetshiftposition Thebobbinsetshiftposition
