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9
The thread regulator determines the needle thread quantity to be guided
around the hook. The required thread quantity depends on the thickness
of the material to be sewn, thread strength, and stitch length.
Larger thread quantity for
• thick material
• high thread strengths
• large stitch lengths
Lower thread quantity for
• thin material
• low thread strengths
• small stitch lengths
Checking the correct setting
1. Open the hook flap ( S. 17) and observe the thread running around
The needle thread loop runs without surplus and without jumping
Faults caused by an incorrect setting
• Poor sewing results
Fig. 24: Adjusting the thread regulator
(1) - Thread regulator
Adjusting steps
1. Turn the handwheel and observe the run of the thread around the hook.
2. Loosen the fastening screw (2).
3. Move the thread regulator (1):
4. Tighten the fastening screw (2).
32
Adjusting the thread regulator
the hook:
around the largest hook diameter.
• Larger thread quantity: Turn the regulator counterclockwise
• Lower thread quantity: Turn the regulator clockwise
Adjusting the thread regulator
(2) - Fastening screw
Service Instructions 512-211-01/532-211-01 - 01.0 - 10/2017
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