Silvercrest SON 90 A1 - Manual (Page 140)

Flatlock decorative seams
To produce flatlock seams, set up the thread tensions for a 3-thread overlock
stitch. Sew a seam and then pull the fabric apart to smooth the seam.
The flatlock seam can be used as a decorative assembly seam or as pure
ornamental stitching (Fig. 87, dark thread).
Tips:
• Pay attention to proper tension, so that the workpiece can be pulled
well apart after sewing.
• Use a decorative thread as the upper looper thread, since this is the
most important thread and will be clearly visible.
1. Remove the right or the left needle (Fig. 88).
2. Set up the recommended tension settings for a 3-thread overlock seam
(Fig. 89).
3. Then readjust the upper thread tensions (green or blue) so that they are
much looser.
4. Now also release the thread tension of the upper looper (red) somewhat.
5. Then adjust the thread tension of the lower looper (yellow) considerably
tighter.
Flatlock seam as assembly seam
• Place the two fabrics to be sewn inside out to each other, so as to create
a decorative seam on the front side.
• Sew the seam and while doing this cut away the excess fabric (Fig. 90).
Figure 91 shows you the stitch pattern for this stitch.
• The upper thread (needle thread) (green or blue) then has a V-shaped
pattern on the inside of the fabric.
• The lower looper thread runs as a straight line along the fabric edge.
• Pull the fabric apart on both sides of the seam, so that the stitches lie
flat.
needle thread
Top
Underside
upper looper thread
Fig. 87
Fig. 88
Fig. 89
Fig. 90
Fig. 91
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lower looper thread
IB_64780_SON 90 A1_LB5 09.03.2011 16:22 Uhr Seite 138