Thread Tension; Adjusting The Needle Thread Tension - DURKOPP ADLER 581 Operating Instructions Manual

Operation
Operating Instructions 581 - 02.0 - 05/2019
4.8

Thread tension

The thread tensions depend on the type and quality of the thread
as well as on the sewing material. The buttonhole looks best when
sewn with the lowest possible thread tension.
Overly tight thread tensions can result in undesired ruffing and
thread breaking with thin sewing material.
4.8.1

Adjusting the needle thread tension

The needle thread tension must generally be set tighter than
the hook thread tension. The thread tension is electronically
regulated. It comprises the main tension for the sewing process
and a remaining residual tension (cutting tension) for tightening
the needle thread during the cutting operation under the throat
plate.
Regulate the residual tension (cutting tension) to suit the elasticity
of the needle thread used, so that the thread end hanging from
the needle is sufficiently long to ensure that the thread is sewn on
safely.
To adjust the needle thread tension:
1. Set the main tension for the sewing process using the control
panel ( p. 69).
2. Set the residual tension (cutting tension) using the control
panel.
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