Operation Manual

How to adjust thread tension

When the needle thread is too

strong:

The bobbin thread will be pulled to the front side of the

fabric. Turn the thread tension adjustment dial towards

"-1" to "-3".

When the needle thread is too

low:

The needle thread will be pulled to the wrong side of

fabric. Turn the thread tension adjustment dial towards

"+1" to "+3".

In case a correct tension setting is not obtained, check

thread paths for both needle and bobbin threads.

Needle thread

Bobbin thread

Fabric (right side)

Needle thread

Bobbin thread

Needle thread

Fabric (right side)

Well-balanced thread tension

Straight stitch: Needle and bobbin threads interlace

with each other at the middle of the

fabric thickness. (

)

Zigzag stitch: Needle thread is pulled a little bit to the

wrong side of the fabric.

If the machine is set to “Auto”, it is suitable for most

fabrics. However, adjustment may be necessary ac-

cording to fabrics and sewing applications.

If the tension is not correctly set, it will cause im-

balanced stitch formation, puckering, and/or thread

breakage.

Weaker tension

Stronger tension

Thread tension

adjustment dial

Fabric (wrong side)