Operation Manual

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Learn your Interlude
Thread Tension
Use the recommended thread tension
setting given on the InfoDisplay.
You can adjust the top thread tension
for special fabrics and/or techniques. To
adjust, turn the numbered tension dial
(a). The higher the number the higher
the tension. Normally top thread tension
is set to around 4.
When sewing buttonholes and decorative
stitches set thread tension to around 3.
When topstitching with a coarse thread in
thick fabric, increase the tension to 7-9.
Correct and incorrect thread tension
To understand the correct thread
tension, sew a few sample zigzag
stitches at different settings.
1 Begin with a tension that is too
loose, i.e. set at the lowest number.
The bobbin thread will lie straight
and the top thread will be drawn to
the underside of the fabric.
2 If you set the tension at the highest
number, the top thread might break
and the seam may pucker and/or
thread breaks.
3 The correct thread tension is set
when the threads interlock in the
middle of both fabric layers or, in
the case of decorative stitches, on
the underside.
Make a few tests on a scrap piece of the
fabric you are going to sew and check
the tension.