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14
①
④
Small
15
①
16
Weaken
①
②
17
0.02～0.05mm
②
⑤
③
②
Big
Strengthen
②
③
1 mm
①
2 .1 m m
④
③
16. Adjusting the thread take-up spring (Fig.14)
1.Changing the swing range of the thread take-up
spring
a.Loosen the set screw ②, move the stopper ③
leftward and rightward, then adjust the thread take-up
spring ①.
b.Move the stopper rightward to increase the swing
range of the thread take-up spring; on the contrary, to
reduce the swing range of the thread take-up spring.
2.Changing the tension of the thread take-up spring
Loosen the nut ④, turn the spring shaft ⑤
counter-clockwise to increase the tension; turn it
clockwise to reduce the tension.
17. Presser foot lifter (Fig.15)
1.Stop the presser foot when it is lifted, lift the
lifting bar ① in the direction of the arrow. When
the presser foot is lifted by 9mm, then stop it.
2.When lowering the presser foot, put down the
lifting bar ① to make the presser foot back to its
original place.
18. Adjusting the pressure of the presser foot (Fig.16)
Turn the adjusting screw ① rightward to increase the
pressure; turn it leftward to reduce the pressure. After
adjustment, tighten the set nut ②.
19. Relationship between needle and rotating hook (Fig.17)
1. Adjust the stitch length dial to 0.
2. Turn the balance wheel to lift the needle bar from
its lowest position by 2.1mm. loosen the screw ①,
adjust the distance between up end of the eye of
needle ② and rotating hook point ③ to 1mm, then
tighten it.
3. Turn the balance wheel to lift the needle bar from
its lowest position by 2.1mm. Loosen the two set
screws ④, turn the rotating hook, align the rotating
hook point ③ with the center of the needle ②,
then tighten the two screws ④.
4. Loosen the two set screws ④, move the rotating
hook leftward and rightward. Align the rotating hook
point ③ and the center of the needle ②, and adjust the
clearance between rotating hook point and needle to
0.02-0.05mm, then tighten the screw.
6
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