Brother International Innov-is 80 Operation Manual - Page 141

The thread tension, is incorrect., The fabric is, wrinkled., Stitches are, skipped.

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Page 141 highlights

Symptom Probable Cause Remedy Reference The upper thread was not threaded correctly. Correct the upper threading. page 28 The bobbin thread is incorrectly installed. Correctly install the bobbin thread. page 26 The thread tension is incorrect. The combination of fabric, thread and needle is not correct. Select a thread and needle that are appropriate for the type of fabric being sewn. The presser foot holder is incorrectly Correctly install the presser foot installed. holder. page 38 page 43 The thread tension is incorrect. Adjust the tension of the upper thread. page 57 A bobbin designed specifically for this machine is not used. Incorrect bobbins will not work properly. Only use a bobbin designed specifically for this machine. page 22 The upper thread was not threaded Correctly thread the upper thread correctly, or the bobbin is incorrectly and correctly install the bobbin installed. thread. page 26, page 28 4 The spool is incorrectly installed. Correctly install the spool. page 28 The fabric is wrinkled. The combination of fabric, thread and needle is not correct. The needle is bent or blunt. Select a thread and needle that are appropriate for the type of fabric being sewn. Replace the needle. page 38 page 39 If thin fabrics are being sewn, the stitch is too long. Shorten the stitch length or sew with stabilizer material under the fabric. page 59 The thread tension is incorrect. Adjust the tension of the upper thread. page 57 The upper thread was not threaded correctly. Correct the upper threading. page 28 Stitches are skipped. The combination of fabric, thread and needle is not correct. The needle is bent or blunt. Select a thread and needle that are appropriate for the type of fabric being sewn. Replace the needle. page 38 page 39 The needle is incorrectly installed. Correctly install the needle. page 39 Dust has accumulated under the Remove the needle plate cover needle plate or in the bobbin case. and clean the race. page 126 Troubleshooting 139

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Troubleshooting
139
4
—— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
The thread tension
is incorrect.
The upper thread was not threaded
correctly.
Correct the upper threading.
page 28
The bobbin thread is incorrectly
installed.
Correctly install the bobbin
thread.
page 26
The combination of fabric, thread
and needle is not correct.
Select a thread and needle that
are appropriate for the type of
fabric being sewn.
page 38
The presser foot holder is incorrectly
installed.
Correctly install the presser foot
holder.
page 43
The thread tension is incorrect.
Adjust the tension of the upper
thread.
page 57
A bobbin designed specifically for
this machine is not used.
Incorrect bobbins will not work
properly. Only use a bobbin
designed specifically for this
machine.
page 22
The fabric is
wrinkled.
The upper thread was not threaded
correctly, or the bobbin is incorrectly
installed.
Correctly thread the upper thread
and correctly install the bobbin
thread.
page 26,
page 28
The spool is incorrectly installed.
Correctly install the spool.
page 28
The combination of fabric, thread
and needle is not correct.
Select a thread and needle that
are appropriate for the type of
fabric being sewn.
page 38
The needle is bent or blunt.
Replace the needle.
page 39
If thin fabrics are being sewn, the
stitch is too long.
Shorten the stitch length or sew
with stabilizer material under the
fabric.
page 59
The thread tension is incorrect.
Adjust the tension of the upper
thread.
page 57
Stitches are
skipped.
The upper thread was not threaded
correctly.
Correct the upper threading.
page 28
The combination of fabric, thread
and needle is not correct.
Select a thread and needle that
are appropriate for the type of
fabric being sewn.
page 38
The needle is bent or blunt.
Replace the needle.
page 39
The needle is incorrectly installed.
Correctly install the needle.
page 39
Dust has accumulated under the
needle plate or in the bobbin case.
Remove the needle plate cover
and clean the race.
page 126
Symptom
Probable Cause
Remedy
Reference