Needle thread tension
54 Service Instructions 827/827-M - 01.0 - 05/2019
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
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:
• Longer spring travel: turn counterclockwise
• Shorter spring travel: turn clockwise
3. Turn the tension disk (3) to set the spring tension:
• Greater spring tension: turn counterclockwise
• Lower spring tension: turn clockwise
Important
Do not twist the stop collar (1) when doing so.
4. Tighten the screw (4).
(1) - Stop collar
(2) - Spring
(3) - Tension disk
(4) - Screw
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