Medion LIFE SM60 Manual De Instrucciones página 220

220
9. Sett ings
9.1. Sett ing the thread tension
If the thread tears while you are sewing, the thread tension is too high.
If small loops are formed when you are sewing, the thread tension is too
low.
In both cases, you need to set the thread tension.
The tensions of the upper thread and bobbin thread must be in the correct
proportion to each other.
9.2. Adjusting the upper thread tension
An upper thread tension of – is suitable for most sewing work.
The tension is created by the discs through which the thread is guided. The
pressure on these discs is controlled by the upper thread tension regula-
tor ().
The higher the number, the higher the tension.
The upper thread tension is not activated until the presser foot is lowered.
There are a number of reasons why you might need to adjust the tension.
For example, different tensions are required for different fabrics.
The tension required depends on the strength and thickness of the fabric,
the number of layers of fabric you want to sew and the type of stitch you
choose.
Please make sure that the tensions of the upper thread and bobbin thread
match, as otherwise the fabric may gather.
We recommend that you carry out a test on a scrap of fabric before starting
work.
9.3. Adjusting the bobbin thread tension
The tension of the bobbin thread is regulated by the spring on the bobbin
case.
Turn the spring screw clockwise to increase the thread tension.
Turn the spring screw anti-clockwise to reduce the thread tension.