SINGER W8931 - Manual (Page 13)

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^ SETTING THE STITCH LENGTH
Tie length of the stitch is regulated by the dial, shown in
Fig. 14. Near 0 is the shortest stitch and 5 is the longest, but
the dial may be set at any spot between the markings for a
variety of lengths. Turn the dial to the right to lengthen and
to the left to shorten the stitch. The number of stitch length
you choose is indicated by the triangular pointer.
STITCH LENGTH CHART (APPROXIMATE)
Figures on indicator 0 1 2 3 4 5
Number of stitches per inch No Feeding 30 25 15isl0 7
SEWING IN REVERSE
When you wish to sew backward to tie the threads at the
beginning or end of a seam, press in the button R, Fig. 13,
as far as it will go. The machine will sew backward as long as
the button is held in.
ADJUSTING THE TENSIONS
Always adjust the upper tension with the presser foot down,
as the tension is automatically released when it is raised. To
increase the tension on the upper thread, turn dial (Fig. 15)
to the right, or clockwise. To decrease, turn to the left. The
higher the number on the dial the tighter the tension. Before
adjusting lower tension be sure that the machine is threaded
properly.
When necessary to change the bobbin tension, turn small
screw (Fig. 16) on side of the bobbin case clockwise to tighten,
counterclockwise to loosen.
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Fig. 15