© ANITA
MP02700EN_200408
GZ-5527 series
13
Correct interlacing of threads in the
center of the material
Increase of the needle thread tension
(or reduce the hook needle tension)
Reduce the needle thread tension (or
increase the hook thread tension)
B. Hook thread tension adjustment
The hook thread tension depends on the adjustment of springs
①
and
②.
Tension spring
①
adjustment
Remove the bobbin case
③
from the machine and insert a full-wound bobbin
④
. Do a complete
threading according to picture
Ⓑ
. Regulate the spring
①
pressure with a screw
⑤
so that the
thread tension is in balance with the case and bobbin weight - when hung down on the thread end
⑥
, the case is dropping slowly with its own weight.
Adjustment of the spring
②
breaking the bobbin during thread trimming
Bobbin braking should be as small as possible because it causes difference of tensions of full and
empty bobbin and subsequently of thread interlacing in the stitch (defective look of the seam).
Regulate the bobbin braking with a screw
⑦
and watch the bobbin unwinding after the thread
trimming: remove the case
③
from the machine, grip it so that the bobbin cannot turn and pull out
the thread end
⑧
. At a correct adjustment, approx. 10 mm of thread will be pulled out of the case.
A
B
C
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