Publicidad
Trouble
shooting
guide
Problem
Upper thread
breaks
Cause
1,The
machine
is
not threaded
correctly
2. The thread tension is too tight
3. The thread is too thick for the needle
4. The needle is not inserted correctly
5,The
thread is round wound
the
spool holder pin
6. The needle is damaged
Lower thread
breaks
1.The bobbin case is not inserted
correctly
2. The bobbin case is threaded wrongly
3.The lower thread tension is too fight
Skipped stitches
1. The needle is not inserted correctly
2. The needle is damaged
3.The wrong size needle has been
used
4. The foot is not attached correctly
Needle breaks
1. The needle is damaged
2.The needle is not correctly inserted
3. Wrong needle size for the fabric
4. The wrong foot is attached
Loose stitches
Seams gather
or pucker
Uneven stitches,
uneven feed
1.The
machine
is
not
correctly
threaded
2.The bobbin case is not correctly
threaded
3. Needle/fabric/thread
combination is
wrong
4. Thread tension wrong
1. The needle is too thick for the fabric
2. The stitch length is wrongly adjusted
3. The thread tension is too fight
1. Poor quality thread
2.The
bobbin
case
is
wrongly
threaded
3. Fabric has been pulled
The machine is
noisy
The machine
jams
1. The machine must be lubricated
2. Fluff or oil have collected on the hook
or needle bar
3. Poor quality oil has been used
4. The needle is damaged
Thread is caught in the hook
Correction
1. Rethread the machine
2. Reduce the thread tension (lower number)
3. Select a larger needle
4. Remove and reinsert the needle (flat side
towards the back)
5. Remove the reel and wind thread onto reel
6. Replace the needle
1. Remove and reinsert the bobbin case and
pull on the thread. The thread should pull
easily
2. Check both bobbin and bobbin case
3. Loosen lower thread tension as described
1.Remove
and reinsert needle (flat side
towards the back)
2. Insert a new needle
3.Choose a needle to suit the thread and
fabric
4. Check and attach correctly
1. Insert a new needle
2. Insert the needle correctly (flat side towards
the back)
3.Choose a needle to suit the thread and
fabric
4. Select the correct foot
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.Select a better quality thread
2. Remove bobbin case and retread and
insert correctly
3. Do not pull on the fabric while sewing, let it
be taken up by the machine
1. Lubricate as described
2.Clean the hook and feed dog as described
3.Only use good quality sewing machine oil
4. Replace the needle
Remove the upper thread and bobbin case,
turn the handwheel backwards and forwards
by hand and remove the thread remands.
Lubricate as described
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