Causes of common difficulties – SINGER W150 FL User Manual
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17. CAUSES OF COMMON DIFFICULTIES
BREAKING OF THE UPPER THREAD :
1. Incorrect threading.
2. Upper thread tension too high.
3. Faulty needle, or needle set in incorrectly.
4. Needle brushing against presser foot or other attochmenfs.
5. Needle eye too small for thread used.
6. Starting the machine suddenly or with a jerk.
7. Starting the machine with the take up lever at its highest point.
BREAKING OF THE LOWER THREAD :
1. Incorrect threoding of the bobbin case.
2. Lower thread tension too high.
3. Bobbin being wound too fully.
4. Rough edge of hole in throat plate caused by improper needle action.
BREAKING OF THE NEEDLE:
1. Pulling the fabric while machine-is running; thus causing the needle to strike
the throat plate.
2. Using bent needle.
1 . Using bent or blunt needles.
2. Needle inserted incorrectly.
3. Needle threaded improoerly.
4. Using wrong sized needle.
5. Pressure of presser toot insufficient, especially when sewing heavy material.
1. Presser foot resting evenly on material.
2. Feed dog not being high enough.
3. Too short stitches used.
4. Pulling the cloth while the machine is running.
5. Usina too fine a needle with too coarse a thread.
SOME USEFUL SEWING HINTS
NEEDLE AND THREAD SIZES
CAUSES OF COMMON DIFFICULTIES