Big bag sewing machine

The single needle lock stitch is achieved using a sewing machine equipped with a needle and a bobbin. The process begins when the needle pierces the fabric, carrying the upper thread down into the fabric layers. As the needle goes down, the bobbin, which is located underneath the fabric, rotates. The upper thread wraps around the bobbin thread, forming a stitch. When the needle pulls back up, the thread tightens, securing the stitch in place.

2. Features and Capabilities The price of double needle sewing machines can also vary based on the features they offer. Basic models might lack advanced functionalities such as automatic thread tension adjustment, programmable stitch patterns, and differential feed. Conversely, high-tech models that offer computerization, touchscreen interfaces, and a wide array of stitch options tend to be significantly more expensive. Features such as adjustable stitch width, multiple needle positions, and built-in thread cutters also add to the cost.

Next, pay attention to the machine's ease of use. Beginners may benefit from user-friendly features such as automatic threading, adjustable stitch lengths, and intuitive control panels. On the other hand, experienced sewists might look for advanced functionalities like programmable settings, speed controls, and a variety of presser feet, which can significantly expand their creative horizons.