Setting The Needle Thread Tension; Opening The Needle Thread Tension - DURKOPP ADLER 381 Operating Instructions Manual

6.2 Setting the Needle Thread Tension

Main tension 3
The main tension 3 is to be set as low as possible.
The interlacing of the threads should lie in the middle of the material (see Illus. a ).
Too high thread tensions can lead to unwanted bunching in thin material and thread
breakage.
–
Set the main tension 3 so that a uniform stitch pattern is achieved.
Supplimentary tension 2
The switchable supplimentary tension 2 serves for the quick change of the needle
thread tension, e.g. at seam thickenings.
–
Set the supplimentary tension 2 lower than the main tension 3.
–
Turn the supplimentary tension 2 on or off with lever 1.
0 = Supplimentary tension 2 is turned off.
1 = Supplimentary tension 2 is turned on.

6.3 Opening the Needle Thread Tension

Automatic
The needle thread tension is automatically opened during thread trimming.
Note
The timing of the thread tension opening can be set with the parameters F-191 and
F-192 (technician level).
Manual
The main and supplimentary tensions can be opened by hand through pressure on A.
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