48
20. Adjustment of needle thread tension
Requirement:
Within the adjusting range from 3 to 5, the interlacing of the needle thread and the bobbin thread
(cotton thread 50/2 or synthetic fiber thread 100/3) must take place approximately in the middle of the fabric
in straight and zigzag stitch setting (fig. 45 and fig. 48).
Check:
• Set the needle thread tension at „5“.
• Set stitch pattern „03“ for zigzag and the stitch width at „6.0“.
• Set the stitch length at „2.0“.
• Place a piece of fabric under the zigzag foot and sew.
• Select stitch pattern „01“ for straight stitch and set the stitch length at „2.5“.
• Sew with straight stitch.
Adjustment:
• First turn milled nut 74 fully to the left (fig. 49).
• Set zigzag stitch „03“, stitch width „6.0“, and stitch length „2.0“.
• Sew with zigzag stitch.
• At the same time turn the milled nut gradually in clockwise direction, until the knot is formed in the
center of the fabric (fig. 45).
Cross-check:
• Sew with straight stitch and zigzag stitch as described under „Check“.
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