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Faults and how to remedy them
Cause:
1. Machine skips stitches
Needle not inserted correctly.
Wrong needle used.
Needle bent or blunt.
Machine threaded improperly.
Needle too thin for thread used.
2. Needle thread breaks
For any of the above reasons.
Thread tension too strong.
Poor-quality or knotty thread used, or
thread that has become too dry by
excessive storage.
3. Needle breaks
Needle not pushed up as far as it
will go.
Needle bent.
Needle too thin or too thick.
Needle bent and strikes needle plate
because work is pushed or pulled.
Bobbin case improperly inserted.
4. Seam is not uniform
Tension out of adjustment.
Thread too thick, knotty or hard.
Bobbin thread wound unevenly.
Kinks appear on top and bottom of
material.
Remedy:
Push needle up as far as it will go, its
flat shank side facing toward the back.
Insert system 130/705 H needle.
Insert new needle.
Check threading.
Use thicker needle.
See par. 1 above.
Regulate thread tensions.
Use only good quality thread.
Insert new needle and push it up as far
as it will go.
Insert new needie.
See Needle Chart.
Let machine feed the work alone.
Only guide the material lightly.
When inserting the bobbin case, push it
in as far as it will go.
Check upper and lower tensions.
Use first-class thread only.
During bobbin winding, do not hold
thread in hand, but pass it through the
bobbin tension stud.
Thread machine properly and check
both tensions.
Cause:
Remedy:
5. Machine feeds irregularly or not at all
Lint has accumulated between tooth
rows of feed dog.
Feed dog dropped. (Drop-feed control is
Flick drop-feed control to the left.
at right.)
6. Machine runs with difficulty
Thread ends in hook raceway.
Remove thread ends and put a drop of
oil into hook raceway.
7. Important notes:
Never run a threaded machine unless there is a piece of fabric under the sewing
foot. If you have to leave the machine, even for a short while, be sure to switch off
the master switch. This is particularly important when children are around.
Remove needle plate and clean out lint.
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