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Problem
1. The machine is not correctly
threaded.
2. The bobbin case is not
Loose
threaded correctly.
stitches
3. Needle/fabric/thread
combination is wrong.
4. The thread tension is wrong.
1. The needle is too thick for the
fabric.
Seam gather
2. The stitch length is wrong.
or pucker
3. The thread tension is too tight. 3. Loosen the thread tension.
1. The needle thread tension is
too tight.
2. The needle thread is not
threaded correctly.
Seam
3. The needle is too heavy for the
puckering
fabric being sewn.
4. The stitch length is too long for
the fabric.
5. Sewing on thin fabric.
1. The presser foot is not suited
for the stitch.
stitches are
distorted
2. The needle thread tension is
too tight.
1. Thread is caught in the hook.
Thread has
2. The feed dogs are packed with
jammed
lint.
1. Fluff or oil have collected on
the hook or needle bar.
2. The needle is damaged.
The machine
3. Thread is caught in the hook.
is noisy
4. The feed dogs are packed with
lint.
1. Poor quality thread.
2. The bobbin case is threaded
Uneven
uncorrect.
stitches,
uneven feed
3. Fabric has been pulled on.
Cause
84
Correction
1. Check the threading and
rethread.
2. Thread the bobbin case as
illustrated.
3. The needle size must suit the
fabric and thread.
4. Correct the thread tension.
1. Select a correct needle size.
2. Adjust the stitch length.
1. Loosen the thread tension.
2. Rethread the machine.
3. Choose a needle to suit the
thread and fabric.
4. Adjust the stitch length shorter.
5. Sew with a stabilizer material
under the fabric.
1. Select the correct foot.
2. Loosen the thread tension.
Remove the upper thread and
bobbin case, turn the handwheel
backwards and forwards and
remove the thread remnants.
1. Clean the hook and feed dog.
2. Insert a new needle.
Remove the upper thread and
bobbin case, turn the handwheel
backwards and forwards and
remove the thread remands.
1. Select a better quality thread.
2. Remove the bobbin case and
the thread and reinsert them
correctly.
3. Do not pull on the fabric while
sewing, let it be taken up by
the machine.
Reference
10
7
15
21
15
27
21
21
10
15
27
46
-
21
81
81
14
81
15
7
-
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