4
Cause: | Remedy: |
4. Seam is not uniform |
|
Tension out of adjustment. | Check upper and lower tensions. |
Thread too thick, knotty or hard. | Use |
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. | Flick |
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.
