Table of Contents
Advertisement
— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Symptom
The upper thread
breaks.
Bobbin thread
does not wind
neatly on the
bobbin.
The lower thread is
tangled or breaks.
Probable Cause
The upper thread was not
threaded correctly (for example,
the spool is not installed correctly,
the spool cap is too big for the
spool being used, or the thread
has come out of the needle bar
thread guide.)
There are knots or tangles in the
thread.
The selected needle is not
appropriate for the thread being
used.
The upper thread tension is too
tight.
The thread is tangled, for example,
in the bobbin case.
The needle is bent or blunt.
The needle is incorrectly installed. Correctly install the needle.
The area around the hole in the
presser foot is scratched, or has a
burr on it.
The bobbin case is scratched, or
has a burr on it.
A bobbin designed specifically for
this machine is not used.
The thread is not passed through
the bobbin-winding thread guide
correctly.
Bobbin spins slowly.
The thread that was pulled out
was not wound onto the bobbin
correctly.
The bobbin thread is incorrectly
installed.
The bobbin is scratched or does
not rotate smoothly, or has a burr
on it.
The thread is tangled.
A bobbin designed specifically for
this machine is not used.
Remedy
Correct the upper threading.
Use the spool cap that best fits the
size of the spool being used.
Remove any knots or tangles.
Select a needle that is appropriate for
the type of thread being used.
Loosen the upper thread tension.
Remove the tangled thread. If the
thread is tangled in the bobbin case,
clean the race.
Replace the needle.
Replace the presser foot.
Contact your authorized retailer.
Replace the bobbin case.
Contact your authorized retailer.
Incorrect bobbins will not work
properly. Only use a bobbin
designed specifically for this
machine.
Correctly pass the thread through the
bobbin-winding thread guide.
Move the sewing speed controller to
the right (so that the speed will be
fast).
Wind the thread that was pulled off
around the bobbin five or six times
clockwise.
Correctly install the bobbin thread.
Replace the bobbin.
Remove the tangled thread and clean
the race.
Incorrect bobbins will not work
properly. Only use a bobbin
designed specifically for this
machine.
Reference
page 29
-
page 37
page 58
page 170
page 39
-
-
page 20
page 22
page 23
page 23
page 25
-
page 170
page 20
Troubleshooting 173
5
Advertisement
Table of Contents
