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Small
Large
Weak
Strong
12. Adjusting the thread take-up spring
(Fig. 12)
1.Changing the travel of the thread take-up spring:
a.Loosen the set screw
leftward and rightward, then adjust the thread
take-up spring
.
b.Move the stopper ③ rightward to increase the
movement of the take-up spring and left to
decrease it.
2.Changing the tension of the thread take-up
spring:
Loosen the nut
, turn the spring shaft
counter-clockwise to increase the tension; turn
it clockwise to reduce the tension.
13. Presser foot lifter (Fig.13)
1.Stopping the presser foot when it is lifted:
Lift the lifting bar
in the direction of the arrow.
When the presser foot is lifted by 9mm, stop it.
2.When lowering the presser foot, put down the
to make the presser foot go back to its
lifting bar
original place.
14. Adjusting the pressure of the presser
foot(Fig. 14)
Turn the adjusting screw
the pressure; turn it leftward to reduce the
pressure. After adjustment, tighten the set nut
.
15. Relationship between needle and
rotating hook(Fig. 15)
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
, adjust the distance between up end of
the eye of needle
and rotating hook point
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
, turn the rotating hook, align
the rotating hook point
needle
, then tighten the two screws
4. Loosen the two set screws
rotating hook leftward and rightward. Align the
rotating hook point
needle
, and adjust the clearance between
rotating hook point and needle to 0.02-0.05mm,
then tighten the screw.
, move the stopper
rightward to increase
with the center of the
.
, move the
and the center of the
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