SunStar HC Series User Manual page 26

3) Take-Up Spring
The take-up spring
stopper touches the spring
Take-up
spring
① Take-up Spring Functions
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 Take-up Spring Adjustment
ⓐ Tension of the take-up spring affects the
thread tension. You can increase the
spring tension by turning the thread
adjusting stud clockwise as shown in the
figure. You can decrease the tension by
turning the stud counterclockwise.
ⓑ To adjust the stroke of the take-up
spring:
To adjust the stroke of the spring during
embroidery work, move the take-up
spring stopper to right or left as shown in
[Fig.4-8].
Correct
Take-up
spring
stopper
The take-up spring stopper does not touch the spring
(when the spring tension is weak or when the stopper is
mis-located)
Wrong
[Fig.4-7]
Thread
tension
adjusting
stud
[Fig.4-8]