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Machine head
8. Tighten the setscrew (1).
9. Remove the arresting pin (3).
10. Switch the machine off and on again.
11. Check that the needle bar is at top dead center.
4.7 Setting the needle thread tension
4.7.1 Setting the thread regulator
The thread regulator determines the tension applied to guide the needle
thread around the hook. The required tension depends on the thickness of
the material to be sewn, thread strength, and stitch length.
Proper setting
The loop of the needle thread slides at low tension over the thickest point
of the hook, without forming loops or snagging.
Fig. 33: Setting the thread regulator
Setting steps
1. Press and turn the hand crank and monitor the progress of the needle
2. Loosen the screw (2).
3. Move the thread regulator
4. Tighten the screw (2).
Service Instructions 911-211 - 00.0 - 02/2015
WARNING
Risk of injury!
Risk of crushing injuries and stab wounds from
sharp and moving parts.
Switch off the machine before checking and setting
the thread regulator.
①
②
thread around the hook.
• Slide to the left = more thread
• Slide to the right = less thread
(1) - Thread regulator
(2) - Screw
1 2 3 4
39
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