Setting needle thread tension
Service Manual 867 Version 02.0 - 04/2015 59
2. Loosen the screw (2).
3. Move the thread regulator
• To reduce tension: Push to the left
• To increase tension: Push to the right
4. Tighten the screw (2).
13.2 Setting the thread tensioning spring
The thread tensioning spring holds the needle thread under tension from
the upper position of the thread lever up to the point when the needle eye
plunges into the material being sewn.
Proper setting
Basic setting: The thread tensioning spring does not contact the stop
until the needle eye has plunged into the material being sewn.
The setting for the thread tensioning spring has to vary according to the
material being sewn and required sewing result.
Fig. 47: Setting the thread tensioning spring
Setting steps
1. Loosen the screw (4).
2. Setting the spring travel: Turn the stop collar (1):
• Longer spring travel: Turn to the left:
• Shorter spring travel: Turn to the right:
WARNING
Risk of injury
Risk of crushing injuries and stab wounds from mov-
ing and sharp parts.
Switch off the sewing machine before checking and
setting the thread tensioning spring.
2
3
4
1
(1) - Stop collar
(2) - Spring
(3) - Tensioning spring
(4) - Screw
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