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4
Cause:
Remedy:
4. Seam is not uniform
Tension out of adjustment.
Check upper and lower tensions.
Thread too thick, knotty or hard.
Use first-class thread only.
Bobbin thread wound unevenly.
During bobbin winding, do not hold
thread in hand, but pass it through the
bobbin tension stud.
Kinks appear on top and bottom of
Thread machine properly and check
material,
both tensions.
5. Machine feeds irregularly or not at all
Lint has accumulated between tooth
Remove needle plate and clean out
rows of feed dog.
lint.
Feed dog dropped. (Drop-feed control
Flick drop-feed control to the left.
is 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. Fundamental rules
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.
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