typical GC0303D - Adjusting Thread Tension Spring

-9-
16
2
5
6
7
3
1
0.3 ~ 0.6N
0.1
0.2
0.4
0.6
0.8
(N)
4
1
5 ~ 8mm
3
5
3
18. Adjusting the thread tension spring
(Fig. 16)
Scale
★The standard position of the thread tension
spring ① is 5-8mm above the upper surface of
the thread guide ③ when the presser foot ② is
lowered.
1.Lower the presser foot ②;
2.Loosen the screw ④;
3.Turn the thread tension bracket ⑤ to adjust
the spring position;
4.Tighten the screw ④.
★The standard tension of the spring is 0.3-0.6N.
5.Push the needle thread with your finger until it
is slightly higher than the thread tension bracket
⑤ and so that the upper thread is not pulled out;
6.Pull the needle thread down until the spring ①
is at the same height with the upper surface of
thread guide ③, and then measure the tension
of the spring.
7.Insert a screwdriver into the slot of the thread
tension stud ⑥, and turn the stud to adjust the
tension of the spring ①.
Note:
If using a tension gauge ⑦ to measure the
tension, take the reading from the scale on the
side of the red line.