SunStar SC 7900-Series, Руководство пользователя

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4) THREAD TENSION ADJUSTMENT
Adjust differently the thread tension by the thread, fabric, stitch
width and other sewing conditions.
The thread tension is adjusted by rotating nuts( ~ ). When
rotating clockwise, the tension is stronger. When rotating
counterclockwise, the tension is weaker. (Refer to the Figure 28)
~ : needle thread
: upper thread
: looper thread
(1) Presser foot lifting adjustment
Set the distance between the presser bar lifting lever
and the presser bar linking bracket
to 1mm when the
presser foot is near the needle plate(Refer to the 6, 7
VERTICAL ADJUSTMENT OF PRESSER FOOT).
This is the standard.
Adjustment order
a. Remove the rubber cap , ,
b. Undo the screw
in the presser bar lifting lever link(large
size) .
c. Adjust the distance by moving the presser bar lifting lever
link(small size) to left or right, then fix it by tightening
the screw .
5) PRESSER FOOT ADJUSTMENT