1 - Basic knowledge about the overlock machine

(2) Configuration and function of the throat plates for the 2-needle overlock machine The throat plate for the overlock machine is as illustrated in Fig.5.

1) Needle slot •

The structure of the needle slot is as illustrated in Fig. 6.

2) Feed dog groove • The feed dog for the 2-needle 4 thread overlock machine comes in three different types. ▪ feed dog with 2 rows of teeth ▪ feed dog with 3 rows of teeth ▪ feed dog with 4 rows of teeth

(3) Configuration and function of the throat plates for the 2-needle 5 thread safety-stitch machine The throat plate for the safety stitch machine is as illustrated in Fig.7.

1) The right side of the main feed dog teeth feeds thread to form double chain stitches (This part is important for producing chain-off thread stitches.)

2) Needle slot for double chain stitches The slot in the rear side of the throat plate has two roles. The first role is to tense the needle thread with a lower thread tension application. The second one is to prevent stitch skipping when producing safety stitch.

Basic Knowledge About the Overlock Machine | © 2018 Superior Sewing Machine & Supply LLC