1-56
S100
Revised 10/2005
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1.
Basic position of the lever
of the upper
thread draw off is adjusted after loosing of
the arresting screw .
2.
Measure of the upper thread draw off is
adjusted by means of stop screw
on
the rod controlled by the cutting lever
movement, which is manually shifted to the
lower position. To protect the thread falls
out of the needle, the thread can only be
loosen after its clamping by the pin .
R e m e m b e r :
Inadequate thread draw off causes stitches
missing in the beginning of the next button hole
sewing. Excessive thread draw off causes
extension of the thread end in the beginning of the
cycle.
3.
If the spring, which control the return of
the lever for the upper thread draw off,
do not prove the lift the lever to the upper
position, is necessary to loosen the
clamping screw
and turn the sprung
stud
for increase of the pressure of the
returnable spring.
4.
For attainment the same length of the
trimmed thread ends, use the nuts of the
constant thrust
for setting-up of the
cutting tension for needed value 50 - 70 kg.
When the tension is excessive, the last stitch
unravels. Excessive loosen nut causes that
the spring of the thread tension is not
functional.
Note :
The regulating nut is for the operator
use, the constant trust nut is adjusted by the
manufacturer, so that it is not necessary to adjust it
further.
5.
By turning the regulating nut clockwise
the thread tension will increase.
6.
By turning the regulation nut counter
clockwise, the thread tension will decrease.
Draw the nut to sew hard materials (jeans), and loosen the nut to sew soft materials.
Using the nut on the race, is possible to affect the thread tension.
The soft tension on the needle bar is partially affecting loop tightening on the looper.
D - MACHINE ADJUSTMENT
2 6 . T H R E A D D R AW O F F M E C H A N I S M