Adjusting the thread system
Service instructions 967 - 00.0 - 12/2014
67
13 Adjusting the thread system
13.1 Setting the thread tensioning spring
The thread tensioning spring (2) tensions the needle thread before the
needle penetrates into the material, so that the thread cannot get under
the needle and be impaled by it.
If the overall thickness of the material is very thin or very thick, the setting
of the spring travel must be adjusted to suit.
Thin material: normal spring travel (basic position: horizontal)
Thick material: long spring travel (basic position: vertically downwards)
Standard setting
• The home position of the thread tensioning spring (2) is horizontal.
• On the home position the spring is turned through 90°.
Figure 47: Setting the thread tensioning spring
Setting steps
1. Loosen the screw (1).
2. Turn the body (3).
3. Turn the sleeve (4) anticlockwise.
4. Restrain the sleeve (4) and body (3) against turning, and tighten the
screw (1).
WARNING
Risk of injury
Switch the machine off before checking or adjusting the thread
system on the machine.
(1) - Screw
(2) - Thread tensioning spring
(3) - Body
(4) - Sleeve
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