Operation Manual

6.4 Adjusting the thread tension

6.4.1 Adjusting the hook thread tension

Caution! Risk of injury!

Tur n off t he main switch.

The hook thread tension may only be adjusted with the machine

switched off.

–

Adjust the hook thread tension via the screw 1. Increase the

tension by tightening the screw.

–

Measure the thread tension with a dynamometer. Thread the

thread according to the picture a nd pull in the arrow direction 2.

This tension is adjusted in the factory in dependence on the

selected sewing equipment according to the table below, and it is

suitable for the usual sewing operations.

For sewing thin soft materials, it is necessary to reduce the

tension. If the seam is to be tightened strongly, it is necessary to

increase the tension and reduce the sewing speed at the same

time.

Hook thread tension mean value

Sewing category Used needle size Thread tension in

grams

light 70 - 80 50

medium 90 - 110 65