Dürkopp Adler 755 B Operating Instructions Manual page 32

2. Adjust the main tension of the needle threads using thread tension (11)
Information
The additional thread tensions (9) and (12) are used to ensure seam
securement at seam beginning and seam end.
The additional thread tension is activated in addition to the main tension
at seam beginning and seam end.
Setting at the control panel OP7000 under Program parameters >
Sewing head parameters > Additional thread tension
( p. 147).
Important
Together with the hook thread tension, the needle thread tension
influences the final seam pattern.
Always adjust needle thread tension and hook thread tension together.
Proper setting
If the tension of needle thread and hook thread is identical, the thread
interlace lies in the middle of the sewing material.
Adjust the needle thread tension so that the desired seam pattern is
achieved with the lowest possible tension.
Fig. 17: Thread tension
(1) - Identical needle thread and hook thread tension
(2) - Hook thread tension higher than needle thread tension
(3) - Needle thread tension higher than hook thread tension
30
(right needle thread) and thread tension (10) (left needle thread).
• Increase the needle thread tension: Turn clockwise
• Reduce the needle thread tension: Turn counterclockwise
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Operating Instructions 755 B, 756 B/F - 00.0 - 02/2021
Operation