Operation Manual

67
4
■ 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 13, 59
The thread
tension is
incorrect.
You have not threaded the upper
thread properly.
Correct the upper threading. page 15
You have not wound the bobbin
thread properly.
Wind the bobbin thread properly. page 10
The bobbin thread is incorrectly
installed.
Correctly install the bobbin thread. page 13
You have not threaded the right com-
bination of thread and needle for the
fabric you are using.
Choose a thread and needle that are
appropriate for the type of fabric.
page 19
You have not attached the presser-foot
holder properly.
Attach the presser-foot holder
properly.
page 23
The thread tension is incorrect. Adjust the tension of the upper thread. page 26, 59
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 10
Bobbin is set incorrectly. Reset the bobbin thread correctly. page 13, 14
The thread is
tangled on the
wrong side of the
fabric.
You have not threaded the upper
thread properly.
Correct the upper threading. page 15, 59
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 50
The thread tension is incorrect. Adjust the tension of the upper thread. page 26, 59
The thread is tangled, for example, in
the race.
Remove the tangle thread. If the
thread is tangled in the race, clean the
race.
page 57, 59
The stitch adjustment level is
incorrect.
Adjust the stitch. page 49