Needle Thread Tension - DURKOPP ADLER 827 Service Instructions Manual

12 Needle thread tension

Adjusting the thread tensioning spring
The thread tensioning spring holds the needle thread under tension from
the top dead center of the thread lever up to the point when the needle eye
plunges into the sewing material.
Fig. 37: Adjusting the thread tensioning spring
(1) - Stop collar
(2) - Spring
Proper setting
Initial position: The thread tensioning spring does not contact the stop
until the needle eye has plunged into the sewing material.
Important
The adjustment for the thread tensioning spring must be varied according
to the sewing material and the required sewing result.
To adjust the thread tensioning spring:
1. Loosen the screw (4).
2. Turn the stop collar (1) to set the spring travel:
3. Turn the tension disk (3) to set the spring tension:
Important
Do not twist the stop collar (1) when doing so.
4. Tighten the screw (4).
54
①
②
• Longer spring travel: turn counterclockwise
• Shorter spring travel: turn clockwise
• Greater spring tension: turn counterclockwise
• Lower spring tension: turn clockwise
Needle thread tension
④
③
(3) - Tension disk
(4) - Screw
Service Instructions 827/827-M - 01.0 - 05/2019