Adjust Needle Thread Tension; Open Needle Thread Tension - Duerkopp Adler 510 Operating Instructions Manual

7.2 Adjust needle thread tension

7.3 Open needle thread tension

10
3
Pretension 3
With open main tension 2 a minor residual stress of the needle thread
is required. The residual stress is produced by the pretension 3.
At the same time the pretension 3 influences the length of the cut
needle thread end (initial thread for the next seam).
–
Short initial thread:
Turn knurled nut 1 in clockwise direction.
–
Long initial thread:
Turn knurled nut 1 counter-clockwise.
Main tension 2
The main tension 2 has to be adjusted as low as possible.
The interlacing of threads should lie in the middle of the fabric.
In case of thin fabrics too high thread tensions can lead to undesirable
ruffling and thread breakage.
–
Adjust main tension 2 in such a way that an even stitch pattern is
achieved.
Increase tension
Reduce tension
Automatic
The needle thread tension is automatically opened when trimming the
thread and when lifting the fabric clamping feet.
2 1
= Turn knurled nut in clockwise
direction
= Turn knurled nut counter-clockwise