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Thread tension control, Straight stitching, Zigzag stitching – Kenmore 17922 User Manual

Page 13: Bobbin thread tension, More tips on thread tension balance, Fabrics, Threads, Icontrolsi thread tension control

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iCONTROLSi

THREAD TENSION CONTROL

STRAIGHT STITCHING

The good looking appearance of your stitching
is largely determined by the balanced tension of
both top and bobbin threads. The tension is well
balanced when these two threads 'lock' in the
middle of layers of fabric you are sewing.

For most fabrics the top thread tension control

should be set in the white zone between 3 and 5.

If, when you start to sew, you find that the

stitching is irregular, you will need to adjust the
tension control.

Make any adjustments with presser foot 'down'.

1. If the threads are locking on the top surface

with the top thread lying flat, the top stitch is
too tight. Tension can be decreased by
turning the tension control to the left (lower

numbers).

2. If the reverse is happening with the threads

on the underside of the fabric, the tension is
too loose. This can be corrected by turning
the tension control to the right (higher
numbers).

ZIGZAG STITCHING

The top thread may appear on the bottom
depending on the thread, fabric, type of stitch
and sewing speed, but the bobbin thread must

never appear on the top of the fabric.

In the case of zigzag stitching, the wider the

zigzag setting, the more chance there is of
puckering. If this occurs decrease the top
tension slightly and/or reduce the zigzag width.

BOBBIN THREAD TENSION

The bobbin thread tension has been correctly
set at the factory, so you do not need to adjust
it.

STRAIGHT STITCHING

Under

side

Well balanced

Top stitch ^ Top stitch
too tight too loose

ZIGZAG STITCHING

MORE TIPS ON THREAD TENSION BALANCE

A perfect stitch is obtained when the tension
is well balanced, but the tension balance may
vary according to the type and size of needle,
thread and fabric. The fabric determines size of
thread and needle. The presser foot pressure
and the thread tension control should also be

adjusted properly.

FABRICS:

Heavy fabrics, stiff - Increase top thread

tension. Use larger size needle, heavier thread
and longer stitch length.

Heavy fabrics, soft - Decrease top thread

tension. Use longer stitch length.

Light, sheer fabrics - Decrease top thread

tension and presser foot pressure. Use shorter
stitch length. Sew slowly.

THREADS:

Polyester and silk - Decrease top thread tension.
Nylon - Increase top thread tension.

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