Brother International SB3150 Operation Manual - Page 135

After sewing

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Troubleshooting Symptom The stitch is not sewn correctly. Probable Cause Remedy The presser foot that is used is not appropriate Attach the presser foot that is appropriate for for the type of stitch that you wish to sew. the type of stitch that you wish to sew. The thread tension is incorrect. Adjust the tension of the upper thread. The thread is tangled, for example, in the bobbin case. Feed dogs are set in the down position. Remove the tangle thread. If the thread is tangled in the bobbin case, clean the race. Slide the feed dog position switch to the right . Reference B-32 B-41, A-6 A-8 B-2 ■ After sewing Symptom Probable Cause Remedy Reference Thread tension is incorrect. Upper threading is incorrect. Check the steps for threading the machine and rethread the machine. B-21 Bobbin is set incorrectly. Reset the bobbin. (If needle plate was removed, reinstall needle plate and tighten screws prior to installing bobbin case. Check to make sure needle enter through the center of needle plate opening.) B-18, A-2 Using improper needle or thread for the selected fabric. Check the "Fabric/Thread/Needle Combinations" chart. B-28 Presser foot holder is not attached correctly. Reattach the presser foot holder correctly. B-32 Thread tension is set incorrectly. Adjust the thread tension. B-41, A-6 Bobbin thread is incorrectly wound. Use a correctly wound bobbin. B-15 Needle is turned, bent or the point is dull. Replace the needle. B-29 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. B-15 Character or decorative patterns Pattern adjustment settings were set incorrectly. Revise the pattern adjustment settings. are misaligned. D-10 Pattern does not turn out. Wrong presser foot was used. Did not use a stabilizer material on thin fabrics or stretch fabrics. Thread tension is set incorrectly. Fabric was pulled, pushed or fed at an angle while it was being sewn. The thread is tangled, for example, in the bobbin case. Attach the correct presser foot. B-32 Attach a stabilizer material. S-4, D-3 Adjust the thread tension. B-41, A-6 Sew while guiding the fabric with your hands so that the fabric is fed in a straight line. B-36 Remove the tangle thread. If the thread is tangled in the bobbin case, clean the race. A-8 MAINTENANCE AND TROUBLESHOOTING A Appendix A-17

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Troubleshooting
Appendix
A-17
MAINTENANCE AND TROUBLESHOOTING
A
■
After sewing
The stitch is not
sewn correctly.
The presser foot that is used is not appropriate
for the type of stitch that you wish to sew.
Attach the presser foot that is appropriate for
the type of stitch that you wish to sew.
B-32
The thread tension is incorrect.
Adjust the tension of the upper thread.
B-41, A-6
The thread is tangled, for example, in the
bobbin case.
Remove the tangle thread. If the thread is
tangled in the bobbin case, clean the race.
A-8
Feed dogs are set in the down position.
Slide the feed dog position switch to the right
.
B-2
Symptom
Probable Cause
Remedy
Reference
Thread tension is
incorrect.
Upper threading is incorrect.
Check the steps for threading the machine and
rethread the machine.
B-21
Bobbin is set incorrectly.
Reset the bobbin. (If needle plate was removed,
reinstall needle plate and tighten screws prior to
installing bobbin case. Check to make sure
needle enter through the center of needle plate
opening.)
B-18, A-2
Using improper needle or thread for the
selected fabric.
Check the “Fabric/Thread/Needle
Combinations” chart.
B-28
Presser foot holder is not attached correctly.
Reattach the presser foot holder correctly.
B-32
Thread tension is set incorrectly.
Adjust the thread tension.
B-41, A-6
Bobbin thread is incorrectly wound.
Use a correctly wound bobbin.
B-15
Needle is turned, bent or the point is dull.
Replace the needle.
B-29
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.
B-15
Character or
decorative patterns
are misaligned.
Pattern adjustment settings were set incorrectly.
Revise the pattern adjustment settings.
D-10
Pattern does not
turn out.
Wrong presser foot was used.
Attach the correct presser foot.
B-32
Did not use a stabilizer material on thin fabrics
or stretch fabrics.
Attach a stabilizer material.
S-4, D-3
Thread tension is set incorrectly.
Adjust the thread tension.
B-41, A-6
Fabric was pulled, pushed or fed at an angle
while it was being sewn.
Sew while guiding the fabric with your hands so
that the fabric is fed in a straight line.
B-36
The thread is tangled, for example, in the
bobbin case.
Remove the tangle thread. If the thread is
tangled in the bobbin case, clean the race.
A-8
Symptom
Probable Cause
Remedy
Reference