SINGER W7911 - Manual (Page 12)

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STITCH LENGTH CHART (APPROXIMATE)
Figures on indicator 0 1 2 3 4 5
Number of stitches per inch No Feeding 30 25 15 10 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. 12, 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. 13)
toward you. To decrease, away from you. 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. 14) on side of the bobbin case clockwise
to tighten, counterclockwise to loosen.
When the upper and under tensions are properly balanced,
a perfect stitch will be formed with both threads interlocking
in fabric (Fig. 15).
When the upper tension is too tight, the lower thread is
pulled up over the upper thread which is lying flat on the fabric
(Fig. 16). When the upper tension is too loose, the upper thread
forms loops over the lower thread lying flat on the fabric(Fig. 17).
Rg. 13