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APPENDIX ——————————————————————————————————————————————————————————————————————————————————————————————————————————
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■ After sewing
Symptom Possible cause How to put it right Reference
The upper
thread has
tightened up.
The bobbin thread is incorrectly
installed.
Correctly install the bobbin thread. page 19, 81
The thread
tension is
incorrect.
You have not threaded the upper
thread properly.
Correct the upper threading. page 22
You have not wound the bobbin
thread properly.
Wind the bobbin thread properly. page 14
The bobbin thread is incorrectly
installed.
Correctly install the bobbin thread. page 19
You have not threaded the right
combination of thread and needle
for the fabric you are using.
Choose a thread and needle that are
appropriate for the type of fabric.
page 28
You have not attached the presser-
foot holder properly.
Attach the presser-foot holder
properly.
page 34
The thread tension is incorrect.
Adjust the tension of the upper
thread.
page 41, 85
You have not used a bobbin that has
been designed for this machine.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
page 14
Bobbin is set incorrectly. Reset the bobbin thread correctly. page 19, 20
The thread is
tangled on the
wrong side of
the fabric.
You have not threaded the upper
thread properly.
Correct the upper threading. page 22, 82
The stitch is not
sewn correctly.
The presser foot you are using is not
appropriate for the type of stitch that
you want to sew.
Attach the presser foot that is correct
for the type of stitch that you want to
sew.
page 73
The thread tension is incorrect.
Adjust the tension of the upper
thread.
page 41, 85
The thread is tangled, for example,
in the bobbin case.
Remove the tangle thread. If the
thread is tangled in the bobbin case,
clean the bobbin case.
page 78, 82