Setting The Underthread Tension - DURKOPP ADLER 381 Operating Instructions Manual

6.7 Setting the Underthread Tension

1
–
Take out the bobbin case with bobbin.
–
To lift the bobbin case reach under the nose 3.
–
Set tension spring 2 by turning the adjustment screw 1.
–
Insert the bobbin case with bobbin into the hook again.
Note:
The spring 4 is to be found under the bobbin in the hook.
When thread trimming the underthread automatically it prevents a "running-on" of the
bobbin.
2 3
Caution Risk of Injury !
Turn the main switch off.
Set the underthread tension only with the sewing machine
turned off.
ATTENTION !
The spring 4 must always be in the bobbin case in the
position shown in the sketch.
The spring 4 should not be lost during cleaning work.
4
15