Duerkopp Adler 274 Operating Instructions Manual - Page 13
Browse online or download pdf Operating Instructions Manual for Sewing Machine Duerkopp Adler 274. Duerkopp Adler 274 18 pages. Preface and general safety notes
Also for Duerkopp Adler 274: Fitting Instructions (2 pages)
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3.3 Replacing the Bobbin and Setting the Looper Thread Tension
- Risk of Injury -
Turn the main switch off!
Removing the Bobbin
Lift up lid 3 and remove the upper part of the bobbin case
with the bobbin.
3
4
Inserting the Bobbin
The insertion of a new, filled bobbin can be seen in the
following illustration.
The thread is pulled in the slit a under the leaf spring b up
to the hole c. When the thread is pulled off the bobbin
must turn in the direction of the arrow.
Important Note!
In order that the bobbin brake spring 5 can move freely
the area behind it is to be cleaned at regular work
intervals of sewing dust. Raise the spring, e.g. with a
needle, and blow out.
6
5
6
7
Setting the Looper Thread Tension
With a recommended looper thread tension of e.g. 30g,
15g should be achieved through the brake spring 5 and
15g through the tension spring 7.
As the base position of the tension spring 7 the following
applies:
Allow the bobbin case to slowly lower through its own
weight. See sketch.
The brake spring 5 blocks the run-on of the bobbin during
thread trimming.
Set its braking effect sensitively.
15