Kenmore 17921 - Manual (Page 16)

CONTROLS
STRAIGHT STITCHING
The good looking appearance of your straight
stitching is, mainly determined by the
balanced tension of the top thread and
bobbin thread. The tension is well balanced
when the two threads lock in the middle of
the layers of fabric when straight stitching.
You can achieve balanced tension by
regulating the Top Thread Tension Control.
If the upper thread appears to be too tight,
dial left (lower numbers) to decrease tension.
If the upper thread is too loose, dial right
(higher numbers) to increase tension.
For most fabrics the tension control shuld be
set in the white zone between 3 and 5.
ZIGZAG STITCHING
Always practice stitching on two layers of the
fabric you will be using.
Make sure that you are using the right size
and type of needle for the fabric. See chart
page 19.
Choose a thread of good quality and type for
your fabric. See chart page 19.
Remember — the wider the zigzag setting,
the more chance for puckering. Reduce the
top tension, if puckering occurs.
The top thread will be visible on the bottom
to varying degrees depending on the thread,
fabric, type of stitch being used and speed of
sewing.
The bobbin thread should never be visible on
the top of the fabric.
THREAD TENSION CONTROL
STRAIGHT STITCH
JUST RIGHT
TOP STITCH
TOO TIGHT
-JLJL-Jci
Decrease tension
TOP STITCH
TOO LOOSE
Increase tension
BOBBIN TENSION
The bobbin tension has been correctly set at
the factory, so you do not need to adjust it.
13