Bobbin-thread tension – SINGER 9100 User Manual
Page 18
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Bobbin-Thread Tension
To Increase
Bobbin-Thread Tension
Bobbin thread tension is controlled by a screw
located on the bobbin case. You will seldom
need to adjust it since it is usually possible to
obtain the correct balance by adjusting needle-
thread-tension alone
Should
It
become necessary to adjust bobbin-
thread tension, use the small screwdriver that
comes with your machine. A very slight turn will
produce a noticeable change in bobbin-thread
tension.
• To increase tension, turn screw clockwise.
• To decrease tension, turn screw counter
clockwise.
Balanced Upper and Lower Tensions
A perfectly locked stitch results
with
upper
and
lower
tensions
balanced so that needle and bobbin
threads
are
drawn
equally
into
fabric.
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