SunStar SWF/B Series User Manual page 31

3) Take-Up Spring
Proper position of the take-up spring
Connect between the take-up spring and the take-up
spring stopper.
Take-up
spring
① Difference in the length of the upper thread pulled by the take-up lever and pulled by the hook creates tension or
looping. When the tension is too weak, the take-up spring handles the leftover length of the upper thread. Increase
the tension or the stroke of the spring to form tight stitches on the embroidery.
② How to adjust the take-up spring
ⓐ Tension of the take-up spring affects the thread tension.
Turn the adjusting stud clockwise to increase the tension
and counter clockwise to decrease.
ⓑ If you want to operating capacity of the take-up spring,
move the take-up spring stopper to the right or left as
shown in [Fig.5-12].
Improper position of the take-up spring
Take-up spring unable to connect with the stopper (due
to dust or foreign material in the stopper.)
Take-up spring
stopper
[Fig. 5-12]
Thread
tension
adjusting
stud
[Fig. 5-13]