Sewing problem: It is 3 types. They are: 
1.       Problems to stitch formation
2.       Seam puckering problem
3.       Fabric damage

Problems to stitch formation: They are given below:
1.       Slipped stitch:
2.       Staggered stitch: It happened for Incorrect adjustment of needle and thread size. Due to wrong needle point. Due to defected motion if fabrics not controlled properly in the feed mechanism of feed dog.
3.      Unbalanced stitch: It happened incorrect tension of sewing thread. Due to Incorrect adjustment of needle thread path. Due to Snagging of needle with bobbin case and positioning finger. Used incorrect thread path or if sewing threads are not lubricated.
4.       Variable stitch density
5.       Frequent thread breakage

Fabric damage problem: They are given below:
1.       Mechanical damage
2.       Fabric damage due to needle heating


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