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Adjusting the needle thread tension
3. Move the thread regulator
4. Tighten the regulator screw (2).
14.2 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.
Correct 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.
Figure 50: Setting the thread tensioning spring
Setting steps
1. Loosen the screw (4).
2. Setting the spring travel
Service manual H867 Version 00.0 - 08/2013
• To reduce the tension: push to the left
• To increase the tension: push to the right
WARNING
Risk of injury by the needle point and moving parts
Switch off the sewing machine before checking and setting the
thread tensioning spring.
(1) - Stop collar
(2) - Spring
Turn the stop collar (1):
• Longer spring travel: Turn the collar to the left
• Shorter spring travel: Turn the collar to the right
(3) - Tension disc
(4) - Screw
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