Operation
26 Operating Instructions 745-35-10 S/745-35-10 A - 03.0 - 04/2017
5. Remove the bobbin case upper section (1) together with the empty
bobbin.
6. Remove the empty bobbin from the bobbin case upper section (1).
Fig. 14: Replacing the bobbin thread reels (2)
7. Insert the full bobbin into the bobbin case upper section (1).
8. Pull the thread through the slot (3) under the thread tensioning
spring (4).
9. Pull the thread approx. 4 cm out of the bobbin case upper section (1).
The bobbin must rotate in the direction of the arrow when pulling out
the thread (against the rotational direction of the hook).
10. Insert the bobbin case upper section (1) with the full bobbin into the
bobbin case bottom section.
11. Close the bobbin case retainer (2).
12. Replace the fabric sliding plate.
13. Switch on the main switch.
14. Start a new sewing process.
4.9 Thread tension
Together with the bobbin thread tension, the needle thread tension influ-
ences the seam pattern.
The needle thread tension is defined by the pre-tensioner, the main ten-
sioner and the additional tensioner.
Proper setting
If the tension of needle thread and bobbin thread is identical, the thread
interlacing lies in the middle of the sewing material.
Set the needle thread tension so that the desired seam pattern is achieved
with the lowest possible tension.
(3) - Slot (4) - Thread tensioning spring
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