Regulating The Speed; Adjusting The Upper Thread Tension - Bernina 570 QE User Manual

Difficult-to-work-with fabrics are:
• Velvet, normally sewn with the grain.
• Toweling.
• Jersey, especially when sewing it crosswise to knit.
• Fake fur or coated fake fur.
• Fleece-types of fabrics.
• Batted fabrics.
• Stripes and checks.
• Curtain fabrics with pattern repeats.
«Sticky» fabrics are:
• Imitation leather, coated fabrics (optimally with optional accessory Zigzag Foot with Non-Stick
Sole #52D).

5.3 Regulating the Speed

The sewing speed can be adjusted infinitely variable with the slide.
> Move the slide to the left to reduce the sewing speed.
> Move the slide to the right to increase the sewing speed.

5.4 Adjusting the Upper Thread Tension

The default setting of the upper thread tension is set automatically as soon as a stitch pattern or an
embroidery design is selected.
The upper thread tension is set optimally at the BERNINA factory and the machine has been tested.
Metrosene/Seralon thread size 100/2 (Mettler, Switzerland) is used for the upper and bobbin thread.
When using different types of sewing or embroidery threads, the upper thread tension may vary. Therefore it
may be necessary to adjust the upper thread tension according to the sewing or embroidering project as well
as the desired stitch pattern or the embroidery design individually.
The higher the upper thread tension is set, the tighter the upper thread is tensioned, and the bobbin thread
is pulled deeper into the fabric. When the upper thread tension is low, the upper thread is less tightened,
and the bobbin thread is pulled up less into the fabric.
Alterations of the upper thread tension affect the currently selected stitch pattern and all embroidery
designs. Permanent alterations of the upper thread tension for the sewing mode (see page 55) and for the
embroidering mode (see page 51) can be made in the Setup Program.
Prerequisite:
• The upper thread tension has been altered in the Setup Program.
> Tap «Upper Thread Tension».
> Adjust the upper thread tension.
> Tap the yellow-outlined icon on the right side to reset the alterations to the default setting.
> Tap the yellow-outlined icon on the left side to reset the alteration to default setting in the Setup
Program.
Creative Sewing
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