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Durkopp Adler 251-140040 Manual

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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.
15. THREAD TENSION
16. THREAD TAKE-UP SPRING
17. ADJUSTING THE THREAD
TAKE-UP STROKE
1) When sewing heavy-weight materials, move thread
guide to the left (in direction ) to increase the
length of thread pulled out by the thread take-up.
2) When sewing light-weight materials, move thread
guide to the right (in direction ) to decrease the
length of thread pulled out by the thread take-up.
3) Normally, thread guide is positioned in a way that
marker line is aligned with the center of the screw.
1A
1B
1
C
1) Loosen set screw .
2) As you turn tension post clockwise (in direction
), the stroke of the thread take-up spring will be
increased.
3) As you turn the knob counterclockwise (in direction
), the stroke will be decreased.
1) Loosen setscrew , and remove tension post .
2) Loosen setscrew .
3) As you turn tension post clockwise (in direction
), the pressure will be increased.
4) As you turn the tension post counterclockwise
(in direction ), the pressure will be decreased.
(2) Changing the pressure of thread take-up
spring
2
3
A
B
25
4
3
A
3
B
1
(1) Changing the stroke of thread take-up
spring 1
1) As you turn thread tension nut clockwise (in direction
), the needle thread tension will be increased.
2) As you turn nut counterclockwise (in direction ),
the needle thread tension will be decreased.
1) As you turn tension adjust screw clockwise (in
direction ), the bobbin thread tension will be increased.
2) As you turn screw counterclockwise (in direction ),
the bobbin thread tension will be decreased.
(2) Adjusting the bobbin thread tension
1
A
1B
2
C
2D
(1) Adjusting the needle thread tension
… 13 …


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