| PROBLEM |
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| PROBABLE | CAUSE |
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| CORRECTION |
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| Incorrect | s}ze | needle. |
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| Choose |
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| size | needle | for | thread | and | fabric, |
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| improper | threading. |
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| Rethread | machine, |
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| Loose | upper | thread | tension. |
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| Tighten |
| upper |
| thread | tension. |
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Irregular | Stitches | Pulling | fabric. |
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| Do | not |
| pull | fabric; | guide | it gently. |
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| Loose | presser | foot, |
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| Reset | presser | foot. |
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| Unevenly | wound | bobbin. |
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| Rewind |
| bobbin. |
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| Nicks | or burrs | at | hole of | needle plate, | Replace | needle | plate, | or polish |
| off | burrs | completely. |
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| Pultin£ | fabric_ |
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| Do | not |
| pull | fabric; | guide | it gently, |
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Breaking | Needle | incorrect | size | needle. |
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| Choose |
| correct |
| size | needle | for | thread | and | fabric. |
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Incorrect | setting | of | needle. |
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| Reset | needle, |
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| Loose | presser | foot. |
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| Reset | presser | foot, |
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| Upper | and | lower | threads | not | drawn | back | When | startmg |
| a seam | be sure | to | draw | both | threads | under | and | |||||||||||
Bunching | of Thread | under | presser | foot | before | starting | seam. | back of | presser | foot |
| about | 4" | and | hold | until a few | stitches | are | ||||||||||||
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| formed. |
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| incorrect | thread | tension. |
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| Reset | thread |
| tension, |
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| Using | two | different | sizes | or | kinds | of | thread, | Upper | thread |
| and bobbin | thread | should | be same s_ze and | kind. | |||||||||||||
Puckering |
| Bent | or blunt | needle, |
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| Insert | new | needle. |
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| Loose | presser | foot. |
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| Reset | presser | foot, |
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| Fabric | too |
| sheer | or | too soft. |
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| Use | underlay |
| of t_ssue paper. |
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