Thread-Tensioning Spring - Duerkopp Adler 550-16-23 Service Instructions Manual

8.2 Thread-tensioning spring

1
2
Regulation and inspection
The thread-tensioning spring 1 must keep the needle thread under
tension at least until the needle tip has penetrated the fabric.
Caution: danger of injury
Turn off the main switch.
The thread-tensioning spring may only be adjusted with the machine
switched off.
Adjusting the thread path
–
Undo screw 4.
–
Twist the sleeve 3.
The thread-tensioning spring 1 must pre-tension the needle thread
at least until the needle tip has penetrated the fabric.
–
Retighten screw 4.
Adjusting the spring tension
–
Undo screw 5.
–
Adjust the tension by twisting the tensioning bolt 2.
The tension of the thread-tensioning spring must be between 20
and 50 cN (1 cN = 1 g) depending on the fabric and yarn.
–
Retighten screw 5.
3
4
5
3
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