Troubleshooting
36
Problem Possible cause Solution
The thread
breaks.
The upper/bobbin thread is incor-
rectly threaded.
Re-thread the threads.
The upper/bobbin thread is
snagged.
Re-thread the threads.
The upper thread tension is too
high.
Relax the tension using the
upper thread tensioner
11
.
The spool of thread and/or
bobbin
3
was positioned
incorrectly.
Re-position the bobbin and/
or spool of thread.
The needle
2
is bent or blunt.
Change the needle.
The needle size/denier/fabric com-
bination is incorrect.
Change the needle and/or
the thread.
An incorrect bobbin was used. Only use the bobbins
supplied.
There is a loop
in the seam.
The thread tension is incorrect. Adjust the upper thread
tension.
The presser foot
21
is not pressed
down.
Press the presser foot le-
ver
28
down to lower the
presser foot.
Stitches are
skipped.
The needle was incorrectly
inserted.
Re-insert the needle.
An unsuitable or defective needle
is used.
Use another needle.
The needle size/denier/fabric com-
bination is incorrect.
Change the needle and/or
the thread.
There are fibres or lint underneath
the needle plate
23
.
Clean the needle plate with
a fine brush.
The thread guidance is incorrect. Re-thread the threads.
The presser foot is not pressed
down.
Lower the presser foot by low-
ering the presser foot lever.
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