DURKOPP ADLER 969 Classic, Service Instructions Manual

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Setting the thread system
Service Instructions 969 - 06.0 - 03/2019 69
12 Setting the thread system
12.1 Setting the thread tension spring
The thread tension spring tensions the needle thread before the needle
penetrates the material, so that the needle thread cannot slip under the
needle and be pierced by it.
Important
If the 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 (initial position: horizontal)
• thick material: long spring travel (initial position: vertically downward)
Standard setting
The initial position of the thread tension spring is horizontal.
When at its initial position, the spring is turned by
90° .
Fig. 52: Setting the thread tension spring
CAUTION
Risk of injury from moving parts!
Crushing possible.
Switch off the machine before you set the thread
system.
(1) - Screw
(2) - Thread tension spring
(3) - Body
(4) - Sleeve
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