Martelli Bella Longarm Series, Руководство пользователя

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Correcting Common Issues
Stitch Quality is Poor Corrective Measure
Tension is Poor Corrective Measure
• Tension is not balanced
• Bobbin case is damaged, corroded, dirty,
etcetera
• Moving the fabric or depressing the foot
pedal inconsistently
• Lint caught under the tension spring in the
bobbin case
• Poorly wound bobbin
• Adjust the tension of the needle thread
after ensuring the bobbin tension is adjusted
correctly
• Since thread slides over the surface of the
bobbin case at a high speed, make sure the
case is free of any lint or foreign matter that
could impede thread passage through the
machine.
• The speed setting should be adjusted to a
value that will allow you to sew comfortably
and confidently with the foot pedal fully
depressed. Discover a method of holding
the fabric that is most comfortable
• With some threads, lint and other material
can build up under the tension leaf spring
and begin to lift the spring. This reduces
the spring’s ability to compress against the
thread. By inserting a needle under the
spring and clearing out the lint, the bobbing
tension will return to the previously set
tension.
• If the bobbin is wound too tight or too
loose it can lead to poor and inconsistent
tension. Make sure when the bobbin is
wound that the thread tension is not so tight
that the wound bobbin thread feels hard and
causes the bobbin sides to bulge. It should
also not be so loose that the thread is spongy,
which can cause the thread to tangle as it is
wound.
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