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If you notice any of the problems listed below, refer to the Remedy column for instructions on how to solve the
problem.
If this cannot solve the problem, or if the problem you are experiencing is not listed below, contact our dealer
nearest you or a qualified technician to carry out the necessary adjustment.
Phenomena
Possible cause
Remedy
Needle thread is
lax
①
is too lax
Needle thread pressure
②
much
The thread is get too
③
guide press to tight lead
needle thread go down
Lower looper thread
Fasten needle thread tension screw
Adjust needle thread bar make thread get little
Turn lax to lower looper thread guide screw or adjust
lower looper thread take-up lever
Thread too tight
①
Needle take-up thread
not enough
②
Thread tension disc too
tight
③
Thread get too much
from lower looper
Move out upper needle a litter make thread gave more
Loosen thread tension nut
Tight lower looper thread tension nut
Too tight or lax
of upper looper
①
Upper looper not fixed in
the right place
Adjust upper and lower looper make thread get
②
Upper looper tension
disc too tight or lax
Tighten or loosen thread tension nut
Upper looper
thread too tight
or lax
①
Upper needle bar not
fixed in the right place
②
Lower looper thread
tension disc too tight to lax
Adjust upper looper make thread gave properly
Loosen or tighten thread tension disc
Chain thread
looper too tight
①
Chain thread tension
disc fixed too inner make
the thread get not enough
②
Chain thread guide plate
not fixed in the right place
Chain thread looper fixed 7-8cm
Adjust the place in the right place
Upper looper
thread make
stitch skipped
①
Looper and needle not
fixed in the right place
②
Long distance between
needle and upper looper
Adjust them to a right place
The distance should be adjusted to 0.05mm between needle
and upper looper
Lower looper
make stitch
skipped
①
Needle not straight or
rough
②
Hole of needle not in the
right orientation
③
Lower looper not peak
enough
④
Thread guide not fixed in
the right place
Change the needle
Adjust the needle make the groove point to the operator
Make it peak or change it
Thread guide plate fixed to a right place make the distance
between plate and needle no more than 0.0.1mm
11
使 用 说明 书
Operation
Instruction
Содержание MO5101
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