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14 Adjusting the needle thread tension
14.1 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.
Lower thread tension for
• thin material
• low thread strengths
Greater thread tension for
• thick material
• high thread strengths
Correct setting
The loop of the needle thread slides at low tension over the thickest point
of the hook, without forming loops or snagging.
Cover
• Throat plate slide
Figure 49: Setting the thread regulator
Setting steps
1. Turn the handwheel and observe the cycle of the needle thread around
2. Loosen the regulator screw (2).
62
WARNING
Risk of injury by the needle point and moving parts
Switch off the sewing machine before checking and setting the
thread regulator.
(
Section 4.4.5 Opening and closing the throat plate slide, page 13)
the hook.
Adjusting the needle thread tension
(1) - Thread regulator
(2) - Regulator screw
1 2 3 4
Service manual H867 Version 00.0 - 08/2013
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