Beldray BEL0050 - Page 22

THE SCIENCE
BEHIND CLEAN
BEL0050 Sewing Machine
23
The upper thread breaks. You have not threaded the
upper thread properly, (eg;
you have not fitted the spool
properly or the thread has
come out of the guide above
the needle).
There are knots or tangles in
the thread.
The upper thread tension is
too tight.
The thread is tangled.
The needle is bent or blunt.
You have not inserted the
needle properly.
Correct the upper threading.
Remove any knots or tangles.
Loosen the upper thread
tension.
Remove the tangled thread.
If the thread is tangled in the
bobbin case, clean the bobbin
case.
Replace the needle.
Insert the needle properly.
The lower thread is tangled
or breaks.
You have not wound the
bobbin thread properly.
The bobbin is scratched or
does not turn smoothly.
The thread is tangled.
Bobbin is set incorrectly.
Wind the bobbin properly.
Replace the bobbin.
Remove the tangled thread
and clean the bobbin case.
Reset the bobbin thread
correctly.
The thread tension is
incorrect.
You have not threaded the
upper thread correctly.
You have not wound the
bobbin thread correctly.
The thread tension is
incorrect.
Bobbin is set incorrectly.
Reset the bobbin thread
correctly.
Wind the bobbin thread
properly.
Adjust the tension of the
upper thread.
Reset the bobbin thread
correctly.