– 28 –
3-13. Adjusting the thread take-up spring and the thread take-up stroke
(1) Adjusting the stroke of thread take-up spring ❶
1) Loosen setscrew ❷.
2) Turn tension post ❸ clockwise (in direction A), the stroke of the thread take-up spring will be increased,
and turn the post ❸ counterclockwise (in direction B), the stroke will be decreased.
(2) Adjusting the pressure of thread take-up spring ❶
1) Loosen setscrew ❷, and remove thread tension (asm.) ❺.
2) Loosen tension post setscrew ❹.
3) Turn tension post ❸ clockwise (in direction A), the pressure will be increased, and turn the post ❸ coun-
terclockwise (in direction B), the pressure will be decreased.
* Standard state of the thread take-up spring ❶
The engraved marker line ❻ on the machine arm is almost aligned with the top of thread take-up spring. (It is
necessary to adjust in accordance with materials and processes.)
(3) Adjusting the thread take-up stroke
1) When sewing heavy-weight materials, move thread guide ❽ to the left (in direction C) to increase the
length of thread pulled out by the thread take-up.
2) When sewing light-weight materials, move thread guide ❽ to the right (in direction D) to decrease the
length of thread pulled out by the thread take-up.
* Standard state of the thread guide
• DDL-9000C-FMS : Marker line ❾ on the thread guide aligns with the center of the setscrew.
• DDL-9000C-FSH : Marker line ❾ on the thread guide aligns with the center of the marker line on the ma-
chine arm.
To check how the thread take-up spring works, draw out the needle thread in direction F after
having adjusted the thread take-up spring pressure to check whether the thread take-up spring
exerts force to the thread up to the last moment (state G) just before the thread comes out
from E. If the spring fails to exert force to the spring until the last moment (state H), decrease
the thread take-up spring pressure. In addition, the stroke of the thread take-up spring is
excessively small, the spring does not work properly. For the general fabrics, a stroke of 10 to
13 mm is proper.
D
C
❾
❽
"DDL-9000C-FMS" "DDL-9000C-FSH"
❾
❽
❺
❶
❹
A
B
❻
❶
❸
❷
A
B
❻
❶
❸
❷
G
H
F
E
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