SINGER 221K Featherweight - Manual (Page 21)

19
PRESSURE ADJUSTMENTS
V PRESSURE
y regulating
SCREW
i /1 I 'V
/ / f
/1/
To decrease pressure, turn thumb
screw up.
To increase pressure, turn thumb
screw down.
Pressure is the force the presser foot exerts on
the fabric.
Too light a pressure will cause irregular feed­
ing, which affects both quality of stitch and
evenness of seams.
Too heavy a pressure not only affects stitch and
seam quality, but will mar smooth surfaces and
pile fabrics.
Surface finish, as well as weight and texture of
the fabric, must be considered when determining
the amount of pressure needed.