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12.2 Setting 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.
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 setting for the thread tensioning spring must be varied according to
the sewing material and the required sewing result.
Fig. 41: Setting the thread tensioning spring
To set the thread tensioning spring:
1. Loosen the screw (4).
2. Setting the spring travel: Turn the stop collar (1):
3. Setting the spring tension: Turn the tension disk (3):
Important
Do not twist the stop collar in doing so.
4. Tighten the screw (4).
60
(1) - Stop collar
(2) - Spring
• Longer spring travel: turn counterclockwise
• Shorter spring travel: turn clockwise
• Greater spring tension: turn counterclockwise
• Lower spring tension: turn clockwise
Setting the needle thread tension
(3) - Tension disk
(4) - Screw
Service Instructions 667 - 00.0 - 04/2016
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