ā 14 ā
(1) Changing the stroke of thread take-up
spring
1
1) Loosen setscrew
2
.
2) As you turn tension post
3
clockw
ise (in direc-
t
ion
A
), the stroke of the thread take-up spr
ing
will be increased.
3) As you turn the knob counterclockwise (in direc-
t
ion
B
), the stroke w
ill be decreased.
(2) Changing the pressure of thread take-up
spring
1
1) Loosen setscrew
2
,
and remove tension post
3
.
2)
Loosen setscrew
4
.
3) As you turn tension post
3
clockw
ise (in direc-
t
ion
A
), the pressure w
ill be increased.
4) As you turn the tension post counterclockwise (in
direction
B
), the pressure will be decreased.
1
2
3
4
5
1
B
A
1) When sewing heavy-weight materials, move
thread guide
1
to the left (in direction
A
) to
increase the length of thread pulled out by the
thread take-up.
2) When sewing light-weight materials, move
thread guide
1
to the right (in direction
B
) to
decrease the length of thread pulled out by the
thread take-up.
3) Normally, thread guide
1
is positioned in a way
that marker line
C
is aligned with the center of
the screw.
1
C
BA
(1) Adjusting the needle thread tension
1) The length of thread remaining at the needle
tip after thread trimming is shortened by turn-
ing tension regulating nut No. 1
1
clockw
ise in
direction
A
.
2)
It is lengthened by turning the nut counterclock-
wise in direction
B
.
3) The needle thread tension is increased by turn-
ing tension regulating nut No. 2
2
clockw
ise in
direction
C
.
4)
It is decreased by turning the nut counterclock-
wise in direction
D
.
(2) Adjusting the bobbin thread tension
1) The bobbin thread tension is increased by turn-
ing tension regulating screw
3
clockw
ise in
direction
E
.
2)
It is decreased by turning the screw counter-
clockwise in direction
F
.
A
B
C
D
E
F
1
2
3
17. Thread tension
18. Thread take-up spring
19. Adjusting the thread take-up stroke
WARNING :
Be sure to turn the power OFF before the following work in order to prevent personal injury due to
unintentional starting of the sewing machine.
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