Operation Manual

Operating Instructions 650-10 - 02.0 - 10/2015 23
Fig. 5: Threading the needle thread, high stretchability
4.4 Setting the needle thread tension
Proper setting
Set the main tension (4) as low as possible.
The thread interlacing should be exactly in the middle of the sewing
material, i. e. identical needle thread and hook thread tension.
With thin sewing material, excessive thread tension can lead to
undesired gathering and thread breakage.
Fig. 6: Interlacing
(1) - Identical needle thread and hook thread tension
(2) - Hook thread tension higher than needle thread tension
(3) - Needle thread tension higher than hook thread tension
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