SINGER W102 - Manual (Page 19)

The stitch length regulator adjusts the stitch length
from very long (about 6 stitches per inch for
very heavy material) to very short (about 30
stitches per inch for very sheer material).
Normal seaming or stitching requires a setting of
12 to 14 stitches per inch (#3).
REGULATING THE STITCH LENGTH
The stitch length regulator, when raised above the center of the stitch
length panel, reverses the direction of the material and causes it to
move back to you.
Reversing the movement of the material is excellent for reinforcing
a seam by double, triple or quadruple seaming. .. excellent for back-
tacking the start or the end of a seam. Simply flick the lever up for
4 or 5 stitches and then bring it down again and the seam is securely
locked. (Fig. 18)
For basting, use the longest stitch by pressing the stitch length lever
all the way down and set the tension indicator to loose. (,The
expert will use a slightly heavier bobbin thread). The threads
can be easily pulled out after the permanent seam has been sewn.
NOTE : Do not neglect to return all settings to normal when basting
has been completed.
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