SINGER M100A - Manual (Page 15)

THE IMPROVED FAMILY SINGER.
thread. To regulate tlie upper tension, turn the ^mall thumb-screw in
front of the tension discs, over toward you to increase the tension, and
from you to diminish it. A loose tension is best for sewing cotton or
linen fabrics, to prevent fullness after the goods have been washed.
If there are loops or a straight Uiread on the under side of the fabric,
as in Fig, 14,
F ig . 14.
it shows that the upper or needle tension is too loose.
If loops or a straight thread appear on the upper side of the goods, as
in Fig. 15,
F ig . 10.
it ^ows that the upper tension is too tight, and it should be diminished
sufficiently to bnng the lock m the centre of the fabric, as in Fig. 16,
F ig . 10 .
To Alter the Length of Stitch.
^ On the right side of the operator, and at the front of the arm, there
is a thumb-screw working in a slot. Loosen this, and move it downwards
to lengthen, or upwards to shorten the stitch. When you get the length
of stitch you require, tighten the thumb-screw.
To Change the Pressure on Material.
Turn the large thumb-screw on the top of the head of the machine,
to the rig^ht to increase, and to the left to diminish the foot-bar pressure;
When properly set, this need never be changed for any ordinary work.