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
Case
Corrective measures
Page
Stitches are
skipped.
1. The needle is bent or the needle point
is blunted.
2. The needle has not been attached to
the needle bar properly.
• Replace the needle.
• Attach the needle properly to the needle
bar.
22
22
Needle thread
breaks.
1. The machine head has been threaded
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.
• Correct the threading.
• Properly adjust the thread tension.
• Replace the needle.
• Replace the needle by the one suited to
the thread used.
15-17
20
22
21
The bobbin
thread breaks.
1. The bobbin thread tension is too high.
2. The rubbing of the bobbin case spring
has produced a slot.
3. Scratches on the needle hole in the
throat plate.
• Decrease the tension.
• Replace the bobbin case.
• Replace the throat plate.
20
-
-
The needle
breaks.
1. The needle is bent or has been in-
stalled improperly.
2. The needle hits the throat plate or the
presser foot.
• Replace or correctly attach the needle.
• Correctly position the needle, throat
plate, or presser foot.
22
-
Stitches are
puckered.
1. The presser foot applies too much
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.
• 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.
10
20
21
21
Stitch perfor
-
mance is bad.
1. The tension of the needle thread is not
balanced with that of the bobbin thread.
• Balance the tensions.
20
The rotation
noise is too
heavy or too
high.
1. Dust accumulates in the feed dog.
2. The oil in the machine has run out due
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.
• 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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30
30
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