Thread Pull - Duerkopp Adler 506 Service Instructions Manual

7. Thread Pull

1
For a secure sewing on at the seam beginning a certain quantity of
drawn-forward needle thread is required.
The drawing-forward occurs after completion of the seam with the
clamps still lowered.
Function sequence
–
The needle thread tension opens.
–
The burner lowers.
–
The thread pull 1 pulls the required thread quantity forward.
–
The thread pull 1 moves back into its base position.
–
The needle thread tension closes again.
–
The thread deflector pulls the drawn-forward needle thread into the
burning position.
–
The thread is burned off.
–
A new sewing sequence can be started.
Setting
The thread pull 1 must be set so that, depending on the material to be
worked, a secure seam beginning is assured.
ATTENTION !
If the drawn-forward thread quantity is too small the thread is too taut
during burning. The thread end doesn't "melt together".
2
To correct:
–
Set the drawn-forward thread quantity by turning the stopper
screw 2.
The stopper screw 2 limits the stroke of the cylinder 3.
3
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