Operation Manual

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(1) Adjusting the needle thread tension
1) As you turn thread tension nut
1
clockwise (in
direction
A
), the needle thread tension will be in-
creased.
2) As you turn nut
1
counterclockwise (in direction
B
), the needle thread tension will be decreased.
(2) Adjusting the bobbin thread tension
1) As you turn tension adjust screw
2
clockwise (in
direction
C
), the bobbin thread tension will be in-
creased.
2) As you turn screw
2
counterclockwise (in direc-
tion
D
), the bobbin thread tension will be de-
creased.
2
C D
1
A
B
15. THREAD TENSION
16. THREAD TAKE-UP SPRING
(1) Changing the stroke of thread take-
up spring
1
1) Loosen setscrew
2
.
2) As you turn tension post
3
clockwise (in direction
A
), the stroke of the thread take-up spring will be
increased.
3) As you turn the knob counterclockwise (in direc-
tion
B
), the stroke will 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
clockwise (in direction
A
), the pressure will 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
17. ADJUSTING THE THREAD TAKE-UP STROKE
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.