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Problem
Needle
7. The upper thread tension is
too tight.
breaks
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
Seam
fabric.
gather or
2. The stitch length is wrong.
pucker
3. The thread tension is too tight.
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. If you are sewing on thin fabric.
1. The correct presser foot is not
Patterns
used.
are
2. The needle thread tension is
distorted
too tight.
1. Thread is caught in the hook.
The
2. The feed dogs are packed with
machine
lint.
jams
1. Fluff or oil have collected on
the hook or needle bar.
2. The needle is damaged.
The
3. Slight humming sound coming
machine
from internal motor.
is noisy
4. Thread is caught in the hook.
5. The feed dogs are packed with
lint.
Cause
76
Correction
7. Loosen the upper thread
tension.
1. Check the threading.
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 finer needle.
2. Readjust the stitch length.
3. Loosen the thread tension.
1. Loosen the thread tension.
2. Rethread the machine.
3. Choose a needle to suit the
thread and fabric.
4. Make the stitch length
shorter.
5. Sew with a stabiliser
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. Replace the needle.
3. Normal.
Remove the upper thread
and bobbin case, turn the
handwheel backwards and
forwards and remove the
thread remands.
Reference
23
14
13
19
23
19
31
23
23
14
19
31
38
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23
74
74
18
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74
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