Three-needle five-thread sewing machine (three-needle five-thread sewing machine) is mainly used for knitting clothes, and its main function is to sew two kinds of fabrics. There is also a four-needle six-thread sewing machine, which is generally tight. And the processing cost is relatively high.

Flat sewing machine is also commonly used to sew decorative stitches. There are many changes in the stitch patterns sewn by flat sewing machine, such as three-needle and four-thread flat sewing (No.407 stitch) can be changed into two-needle and three-thread flat sewing (No.406 stitch), and can also be changed from two-needle and three-thread flat sewing to two-needle and four-thread flat sewing or three-needle and five-thread flat sewing (No.602 stitch or No.605 stitch). ?

Extended data:

Three-needle five-thread flat sewing machine;

Preliminary judgment on the causes of needle jumping failure of flat sewing machine: check whether the needle is intact, such as bending, blunt needle tip, correct installation, etc. Check whether the case line is correct, especially whether the line is on the line blocking board, and it is easy to jump without it; Check the quality of wire, and whether to add silicone oil for lubrication.

After a preliminary inspection of the needle jumping fault of the flat sewing machine, if the above points are eliminated, it is necessary to check the relationship between the needle and the bending needle.

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