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104
1 Upper thread guide pretension knob
2 Tighter
3 Looser
■ Correct Thread Tension
The pattern can be seen from the wrong side of the
fabric. If the thread tension is not set correctly, the
pattern will not finish well. The fabric may pucker or
the thread may break.
1 Right side
2 Wrong side
Follow the operations described below to adjust
thread tension according to the situation.
■ Upper thread is too tight
The tension of the upper thread is too tight, resulting
in the bobbin thread being visible from the right side
of the fabric.
1 Right side
2 Wrong side
Turn the knob in the direction of the arrow to
decrease the tension of the upper thread.
1 Red line
If the red line is visible, the thread tension cannot be
decreased any further. Increase the tension of the
bobbin thread. For details, refer to page 102.
■ Upper thread is too loose
The tension of the upper thread is too loose,
resulting in a loose upper thread, loose thread locks
or loops appearing on the right side of the fabric.
1 Right side
2 Wrong side
Turn the knob in the direction of the arrow to
increase the tension of the bobbin thread.
Note
• If the thread tension setting is made
extremely weak, the machine may stop
during sewing. This is not the sign of a
malfunction. Increase the thread tension
slightly, and begin sewing again.
• If necessary, refer to page 213 for
reassembling the tension unit.
Note
• If you decrease the thread tension further
than the red line, the tension knob may be
disassembled.
• If necessary, refer to page 213 for
reassembling the tension unit.
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