Duerkopp Adler 550-16-26 Instrukcja obsługi - Strona 6
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4.2 Setting the Needle Thread Tension
4.3 Releasing the Needle Thread Tension
Pre-tension
With open main tension 3 a slight residual tension on the needle thread
is necessary. The residual tension is created by pre-tension 1.
The pre-tension 1 influences the length of the cut needle thread end at
the same time (starting thread for the next seam).
–
Base position:
Turn the knurled nut 1, until its face is flush with bolt 2.
–
Shorter starting thread:
Turn knurled nut 1 clockwise.
Main tension
The main tension 3 is to be set as low as possible.
The interlacing of the threads should lie in the middle of the material.
Too high thread tensions can lead to undesired puckering and thread
breakage in thin material.
–
Set the main tension 3 so that a uniform stitch formation is
achieved.
Increase tension
Decrease tension
ATTENTION !
The main tension can be opened through the control.
(e.g. for sewing Polsters)
Supplementary tension
The supplementary tension 4 can be switched on for thicker gathering
(programmable).
–
Set the supplementary tension 4 lower than the main tension 3.
Automatic
The needle thread tension is automatically opened during thread
trimming and lifting of the sewing foot.
= Turn the knurled nut clockwise
= Turn the knurled nut -
counterclockwise
1
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