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APPENDIX — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
The lower thread is
tangled or breaks.
A bobbin designed specifically for
this machine is not used.
Incorrect bobbins will not work
properly. Only use a bobbin
designed specifically for this
machine.
page 22
The thread is
tangled on the
wrong side of the
fabric.
The upper thread was not
threaded correctly.
Correct the upper threading. page 32
The thread tension
is incorrect.
The upper thread was not
threaded correctly.
Correct the upper threading.
Make sure that the thread is hanged
on the thread guide spring which is
on the left side of the thread guide
cover.
page 32,
page 33
The bobbin thread is incorrectly
installed.
Correctly install the bobbin thread. page 27
The combination of fabric, thread
and needle is not correct.
Select a thread and needle that are
appropriate for the type of fabric
being sewn.
page 39
The presser foot holder is
incorrectly installed.
Correctly install the presser foot
holder.
page 45
The thread tension is incorrect.
Adjust the tension of the upper
thread.
page 59
A bobbin designed specifically for
this machine is not used.
Incorrect bobbins will not work
properly. Only use a bobbin
designed specifically for this
machine.
page 22
The upper thread is
too tight.
The bobbin thread is incorrectly
installed.
Correctly install the bobbin thread. page 27
The fabric is
wrinkled.
The upper thread was not
threaded correctly, or the bobbin
is incorrectly installed.
Correctly thread the upper thread and
correctly install the bobbin thread.
page 22,
page 31
The spool is incorrectly installed. Correctly install the spool. page 31
The combination of fabric, thread
and needle is not correct.
Select a thread and needle that are
appropriate for the type of fabric
being sewn.
page 39
The needle is bent or blunt. Replace the needle. page 41
If thin fabrics are being sewn, the
stitch is too coarse.
Shorten the stitch length or sew with
stabilizer material under the fabric.
page 59,
page 66
The thread tension is incorrect.
Adjust the tension of the upper
thread.
page 59
Stitches are
skipped.
The upper thread was not
threaded correctly.
Correct the upper threading. page 32
The combination of fabric, thread
and needle is not correct.
Select a thread and needle that are
appropriate for the type of fabric
being sewn.
page 39
The needle is bent or blunt. Replace the needle. page 41
Symptom Probable Cause Remedy Reference