Duerkopp Adler 195 Kullanım Talimatları Kılavuzu - Sayfa 14
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3.4 Setting the Thread Tensions
16
The thread tension of the needle thread must be
higher than that of the bobbin thread. The control
knob for the bobbin thread tension thus has a
spring of thinner wire.
Too high thread tensions cause a puckering of the
material.
Too low bobbin thread tensions can cause faulty
stitches.
For setting a greater thread quantity in the seam
see Section 3.5.
Furthermore, one can work with or without
pneumatic tension opening during the stroke of the
sewing foot.
The tension opening is necessary when the sewing
material with thread is to be pulled forward under
the sewing foot. Here the arm cover must be
removed and the coupling plug inserted into the
preattached coupling socket.
Attention!
When sewing corners with sewing foot stroke a
loose stitch results. Thus, pneumatic tension
opening should only be used when there is no
sewing foot stroke during the course of the seam.