Adjusting the thread system
Service Instructions 967 - 02.0 - 12/2015
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 slip under
the needle and be pierced by it.
If the overall thickness of the material is very thin or very thick, the setting
of the spring travel must be adjusted accordingly.
Thin material: normal spring travel (basic position: horizontal)
Thick material: long spring travel (basic positio
n: vertically downwards)
Standard setting
• The home position of the thread tensioning spring (2) is horizontal.
• When at its home position, the spring is turned by 90°.
Fig. 48: Setting the thread tensioning spring
Setting steps
1. Loosen the screw (1).
2
. Turn the body (3).
3. Turn the sleeve (4) counterclockwise.
4. Restrain sleeve (4) and body (3) against turning, and tighten the screw (1).
WARNING
Risk of injury!
Crushing injuries from moving parts.
Switch the machine off before checking and
a
djusting the thread system on the machine.
(1) - Screw
(2) - Thread tensioning spring
(3) - Body
(4) - Sleeve
①
②
③
④
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