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Troubles and Corrective Measures
If sewing difficulties occur, make sure the instructions are correctly followed. If a problem still exists, the re-
minders below help to solve it.
Troubles
Stitches are
1. The needle is bent or the needle point
skipped.
is blunted.
2. The needle has not been attached to
the needle bar properly.
Needle thread
1. The machine head has been threaded
breaks.
incorrectly.
2. The needle thread tension is too high
or low.
3. The needle is bent or the needle point
is blunted.
4. The needle is not suited to the thread
used.
The bobbin
1. The bobbin thread tension is too high.
thread breaks.
2. The rubbing of the bobbin case spring
has produced a slot.
3. Scratches on the needle hole in the
throat plate.
The needle
1. The needle is bent or has been in-
breaks.
stalled improperly.
2. The needle hits the throat plate or the
presser foot.
Stitches are
1. The presser foot applies too much
puckered.
pressure to the material.
2. The tension of the needle thread is not
balanced with that of the bobbin thread.
3. When the combination of the needle
and the thread is improper.
4. The needle is too thick for the material.
Stitch perfor-
1. The tension of the needle thread is not
mance is bad.
balanced with that of the bobbin thread.
The rotation
1. Dust accumulates in the feed dog.
noise is too
heavy or too
2. The oil in the machine has run out due
high.
to a long period of usage.
3. The oil other than the exclusive sewing
machine oil is used.
4. Thread wastes accumulate in the hook.
32
Case
Corrective measures
• Replace the needle.
• Attach the needle properly to the needle
bar.
• Correct the threading.
• Properly adjust the thread tension.
• Replace the needle.
• Replace the needle by the one suited to
the thread used.
• Decrease the tension.
• Replace the bobbin case.
• Replace the throat plate.
• Replace or correctly attach the needle.
• Correctly position the needle, throat
plate, or presser foot.
• Decrease the pressure of the presser
foot.
• Balance the tension.
• Properly correct the combination of nee-
dle and the thread.
• Replace the needle by the one suited to
the material.
• Balance the tensions.
• Carry out maintenance of your sewing
machine.
• Carry out maintenance of your sewing
machine.
• Apply the proper sewing machine oil.
• Clean up the sewing machine.
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