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APPENDIX — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Symptom
▲
The thread tension is incorrect.
The fabric is
wrinkled.
You have not threaded the upper thread
properly.
You have not used the right combination of
fabric, thread and needle.
Stitches are
skipped.
The needle is bent or blunt.
The needle is incorrectly installed.
Dust has accumulated under the needle
plate or in the bobbin case.
The needle has not been raised to the
The needle
correct position.
threader can
not be used.
You have not inserted the needle properly.
The presser foot that you are using is not
correct for the type of stitch.
The stitch is
The thread tension is incorrect.
not sewn
correctly.
The thread is tangled.
The stitch is too fine.
The feed dogs are lowered.
You have not used the right combination of
The fabric
fabric, thread and needle.
does not feed.
The thread is tangled, for example, in the
race.
The presser foot you are using is not
appropriate for the type of stitch that you
want to sew.
A high-
pitched sound
is produced
Dust has accumulated in the feed dogs or
while sewing.
in the bobbin case.
A rattling
noise is
produced.
47
Possible cause
How to put it right
Adjust the tension of the upper thread.
Correct the upper threading.
Choose a thread and needle that are
appropriate for the type of fabric.
Replace the needle.
Correctly install the needle.
Remove the needle plate and clean the
plate and the bobbin case.
Raise the needle by turning the
handwheel toward you
(counterclockwise) so that the mark on
the wheel points up.
Insert the needle properly.
Attach the presser foot that is correct
for the type of stitch that you want to
sew.
Adjust the tension of the upper thread.
Remove the tangled thread. If the
thread is tangled in the bobbin case,
clean the bobbin case.
Lengthen the stitch length.
Slide the feed dog position switch to
.
Choose a thread and needle that are
appropriate for the type of fabric.
Remove the tangle thread. If the thread
is tangled in the race, clean the race.
Attach the presser foot that is correct
for the type of stitch that you want to
sew.
Clean the bobbin case.
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