Duerkopp Adler 251-140042 Manual - Página 13

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Duerkopp Adler 251-140042 Manual

18. THREAD TENSION

19. THREAD TAKE-UP SPRING

20. ADJUSTING THE THREAD
TAKE-UP STROKE
WARNING:
To avoid possible personal injury due to abrupt start of the machine, turn off the power to the machine
and check to be sure that the motor has totally stopped rotating in prior.
(1) Adjusting the needle thread tension
1) As you turn thread tension No.1 nut
(in direction
A
), the thread remaining on the needle
after thread trimming will be shorter.
2) As you turn nut
1
the thread length will be longer.
3)As you turn thread tension No.2 nut
(in direction
C
), the needle thread tension will de
increased.
4)As you turn nut
2
the needle thread tension will de decreased.
(2) Adjusting the bobbin thread tension
1) As you turn tension adjust screw
direction
E
), the bobbin thread tension will be
increased.
2) As you turn screw
F
), the bobbin thread tension will be decreased.
(1) Changing the stroke of thread take-up
spring
1
1) Loosen set screw
2) As you turn tension post
A
), the stroke of the thread take-up spring will be
increased.
3) As you turn the knob counterclockwise (in direction
B
), the stroke will be decreased.
(2) Changing the pressure of thread take-up
spring
1
1) Loosen setscrew
2) Loosen setscrew
3) As you turn tension post
A
), the pressure will be increased.
4) As you turn the tension post
(in direction
B
), the pressure will be decreased.
1) When sewing heavy-weight materials, move thread
guide
1
to the left (in direction
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
length of thread pulled out by the thread take-up.
3) Normally, thread guide
marker line
C
is aligned with the center of the screw.
-8-
1
clockwise
counterclockwise (in direction
2
clockwise
counterclockwise(in direction
3
clockwise (in
3
counterclockwise (in direction
2
.
3
clockwise (in direction
2
, and remove tension post
4
.
3
clockwise (in direction
3
counterclockwise
A
) to increase the
B
) to decrease the
1
is positioned in a way that
B
),
D
),
5
.