Brother SQ9185 - Manual (Page 109)

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The upper thread
breaks.
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.)
Correct the upper threading. Use the
spool cap that best fits the size of the
spool being used.
page 25
There are knots or tangles in the
thread.
Remove any knots or tangles. –
The needle is not appropriate for the
thread you are using.
Choose a needle that is appropriate
for the type of stitch.
page 31
The upper thread tension is too tight. Loosen the upper thread tension. page 43
The thread is tangled, for example, in
the race.
Remove the tangle thread. If the
thread is tangled in the race, clean the
race.
page 91, 95
The needle is bent or blunt. Replace the needle. page 32
The needle is incorrectly installed. Correctly install the needle. page 32
The area around the hole in the
needle plate is scratched.
Replace the needle plate.
Contact your retailer or the nearest
authorised service center.
–
The area around the hole in the
presser foot is scratched.
Replace the presser foot.
Contact your retailer or the nearest
authorised service center.
–
The bobbin case is scratched, or has a
burr on it.
Replace the bobbin case.
Contact your retailer or the nearest
authorised service center.
–
You have not used a bobbin that has
been designed for this machine.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
page 17
The lower thread
is tangled or
breaks.
You have not wound the bobbin
thread properly.
Wind the bobbin thread properly. page 17
The bobbin is scratched or does not
turn smoothly.
Replace the bobbin. –
The thread is tangled.
Remove the tangled thread and clean
the race.
page 91, 95
You have not used a bobbin that has
been designed for this machine.
Incorrect bobbins will not work
properly. Only use a bobbin that has
been designed for this machine.
page 17
Bobbin is set incorrectly. Reset the bobbin thread correctly. page 22, 23
The fabric is
wrinkled.
You have not threaded the upper thread
properly or fitted the bobbin properly.
Thread the upper thread and wind the
bobbin thread properly.
page 22, 23, 25
The spool or spool cap is incorrectly
installed.
Correctly install the spool or spool
cap.
page 26
You have not used the right
combination of fabric, thread and
needle.
Choose a thread and needle that are
appropriate for the type of fabric.
page 31
The needle is bent or blunt. Replace the needle. page 32
If thin fabrics are being sewn, the
stitch is too long or the fabric is not
being fed correctly.
Sew with the stabilizer material under
the fabric.
page 46
If thin fabrics are being sewn, the
stitch is too coarse.
Shorten the stitch length, or sew with
stabilizer material under the fabric.
page 40, 46
Symptom Possible cause How to put it right Reference