1
Thread tension
The basic setting
is indicated when the red line on the tension adjustment wheel is in line with
the marking 1
the thread tension needn't be altered when sewing standard fabric
for special fabric, the tension can be adjusted by turning the tension
adjustment wheel to suit the material
Perfect Stitch Formation
The interlooping of the threads is in the material.
Upper thread tension too tight
The lower thread is pulled more up, i.e. to the right side of the material.
⦁
to reduce the upper thread tension = turn tension adjustment wheel to 3-1
Upper thread tension too loose
The upper thread is pulled more down, i.e. to the wrong side of the material.
⦁
to increase the upper thread tension = turn tension adjustment wheel
to 5-10
The upper thread tension is set optimally at the BERNINA factory
and the sewing computer has been tested. Metrosene-/Seralon thread
size 100/2 (Company Mettler, Switzerland) are used for upper and lower
thread.
In case of using other types of sewing or embroidery threads, the optimal
tension may vary. Therefore it may be necessary to adjust the tension to suit
the fabric and the desired stitch pattern.
For example:
Tension Needle
Metallic thread approx. 3 90
Monofilament thread approx. 2-4 80
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