Brother 888-E30 Operation Manual page 66

Symptom
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 needle is not appropriate for the
thread you are using.
The upper thread tension is too tight.
The thread is tangled, for example, in
the race.
The needle is bent or blunt.
The upper thread
The needle is incorrectly installed.
breaks.
The area around the hole in the
needle plate is scratched.
There is a notch (a) on
the left side of the
opening in the needle
plate. This is not a
scratch.
The area around the hole in the
presser foot is scratched.
The bobbin case is scratched, or has a
burr on it.
You have not used a bobbin that has
been designed for this machine.
You have not wound the bobbin
thread properly.
The bobbin is scratched or does not
turn smoothly.
The lower thread
is tangled or The thread is tangled.
breaks.
You have not used a bobbin that has
been designed for this machine.
Bobbin is set incorrectly.
You have not threaded the upper thread
properly or fitted the bobbin properly.
The spool or spool cap is incorrectly
installed.
You have not used the right
The fabric is
combination of fabric, thread and
wrinkled.
needle.
The needle is bent or blunt.
If thin fabrics are being sewn, the
stitch is too long or the fabric is not
being fed correctly.
Possible cause
a
How to put it right
Correct the upper threading. Use the
spool cap that best fits the size of the
spool being used.
Remove any knots or tangles.
Choose a needle that is appropriate for
the type of stitch.
Loosen the upper thread tension.
Remove the tangle thread. If the
thread is tangled in the race, clean the
race.
Replace the needle.
Correctly install the needle.
Replace the needle plate.
Contact your retailer or the nearest
authorised service center.
Replace the presser foot.
Contact your retailer or the nearest
authorised service center.
Replace the bobbin case.
Contact your retailer or the nearest
authorised service center.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
Wind the bobbin thread properly.
Replace the bobbin.
Remove the tangled thread and clean
the race.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
Reset the bobbin thread correctly.
Thread the upper thread and wind the
bobbin thread properly.
Correctly install the spool or spool
cap.
Choose a thread and needle that are
appropriate for the type of fabric.
Replace the needle.
Sew with the stabilizer material under
the fabric.
Reference
page 15
–
page 19
page 26
page 57, 59
page 20
page 20
4
–
–
–
page 10
page 10
–
page 57, 59
page 10
page 13, 14
page 13, 14, 15
page 15
page 19
page 20
page 28
65