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17. UPPER TENSION DIAL
STANDARD
1.
The clearance between two discs should
when presser foot i s lowered and tension dial is set at
2.
Spnng i s touched with spring holder and the top of thread
release plate begins to depress on the tension disc
presser foot is lowered and tension dial rs set at
ADJUSTMENT
1.
Set upper tension dial at
2.
Lower the presser foot lever.
3.
Loosen two screws.
4.
Adjust the position of thread tension bracket to meet wrth
1.
above standard
5.
Tighten the screws.
6.
Set upper tension dial at
7.
Loosen a hexagon socket
8.
Adjust the position of spring holder to meet with above
standard
2.
9.
Tighten the
screw.
be 0 - 0.3
B.
when
8.
0.
8.
screw.
mm
0.
-47-
Screw
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