MINOR TROUBLES AND THEIR CAUSES

TANGLED THREAD AT THE BEGINNING :---

1. Bobbin too full .

2. Bobbin set in wrong direction .

3. Under thread not drawn up .

4. Both threads not pulled back under the presser foot .

5. Machine not properly oiled and cleaned .

SKIPPED STITCHES :---

1. Needle bent .

2 .Needle set with long groove turned to wrong side .

3. Needle inserted too high or too low in the needle bar .

4 .Needle threaded from the wrong side .

5. Needle too small .

6 . Excess oil on shuttle .

UPPER THREAD BREAKING :---

1. Poor thread .

2 .Machine in correctely threaded .

3 .Needle set on wrong side .

4 .Needle too fine for thread .

5 . Needle threaded from the wrong side .

6 .Upper tension too tight .

7 .Sharp edge on needle plate hole or suhttle .

8. Thread take -up spring broken .