21 BA_310D-R_3100D-R_A16-3_180117_en
4.5.2 Thread tensioning – reel thread (Fig. 11)
The leaf spring (2) regulates the bobbin thread tension. By turning the flat-head
screw with catch (1), the leaf spring must be adjusted in such a way that when
the bobbin is inserted, and the thread is correctly pulled under the leaf spring
and the bobbin case is released, the latter, together with the bobbin drops
slowly down. A slight pull on the thread might be necessary.
Fig. 11
4.6 Adjusting the stitch length (Fig. 8 and Fig. 12)
CAUTION! Danger of Injury!
Switch off the machine and ensure it is switched off by
pressing the pedal for switching the motor.
Otherwise there is a danger of injury through crushing and
needle stitches.
The stitch length can be adjusted after lifting the cover (1) (Fig. 8).
First release grub screw (1) (Fig. 12), then turn cheese-head screw (2) (Fig. 12)
to the left, the stitch length becomes larger, or to the right, the stitch length
becomes smaller.
After adjusting the required stitch lengths, retighten the grub screw (1) (Fig. 12).
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