Bernina Artista 640 User Manual page 33

Thread Tension
Basic tension settings apply automatically when a stitch or program is selected.
The tension is factory set for the best possible sewing results using a 100 weight,
2 ply polyester thread (100/2). "Metrosene" 100/2 (Arova-Mettler, Switzerland)
thread is used for the bobbin as well as the upper thread.
The tension may vary when using other types of thread such as embroidery thread,
and it may be necessary to adjust the tension to suit the fabric and stitch type.
Altering the Tension
• touch symbol
Altering the Tension
• the perfect stitch formation is
shown in the middle of the
touch- screen (stitch formation
in the fabric) the basic value is
indicated by the blue bar on
the scale
• turn stitch length or stitch
width knob to the left or right
= the thread tension is
loosened or tightened
• the tension alteration is
indicated on the left side of
the tension scale
• tighten upper thread tension
(= the upper thread is
tightened which pulls the
lower thread to the right side
of the fabric
Save and close
• touch «OK»
• the alteration is saved, the
screen display changes
Back to Basic Settings
• touch «Reset» to return
tensions to the basic settings
• touch «OK» symbol to confirm
No adjustments
• touch «ESC»
• the existing thread tension is
not changed
Functions
• loosen upper thread tension (=
the upper thread is loosened
which pulls the upper thread
more to the wrong side of the
fabric
• the tension alteration affects
only the selected stitch and
will be deleted with «CLR»
and does not remain saved
when turning the sewing
computer off «0»
• the alteration is indicated on
the scale and on the multi-
function button on the screen
• the basic value stays visible (in
black) when a change is made
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