What is overlock?

Sewing beginners usually do not fully understand the purpose and importance of the devices used by professionals. Some may seem unnecessary, others may seem easily replaceable. Quite often, this opinion extends to such a necessary device for the work of craftswomen and needlewomen as an overlock. Let's find out what it is and why.

Overlock: concept, functions and application

This name refers to a type of sewing equipment designed for processing slices woven materials. The device, depending on the type, can be industrial or household. They differ among themselves in productivity and complexity of technology. An overlocker can simultaneously overcast and trim the edge of the fabric, protecting it from fraying and snagging.

Interesting! Some varieties can sew down individual parts, thereby forming a stitch in the form of a chain stitch.

The main functions of overlockers include processing the edges of the material, trimming excess threads, and stitching together parts of garments.Additionally, they are able to give the seams an attractive and neat appearance.

The use of overlock is universal. These multifunctional devices can be used for decorating and directly creating wardrobe and interior items. The seams made with its help are reliable and very elastic.

Types of overlockers

These sewing devices are distinguished by the following parameters:

1. Number of threads. To form a seam, from 2 to 10 pieces can be used.
2. Refill method. Performed automatically or manually.
3. Knives. On professional devices they are usually supplemented with top and bottom drives. Standard ones use one - the bottom one.
4. Thread tension. The adjustment is made manually or automatically.
5. Stitch size. Can be selected independently or adjusted mechanically.
6. Switching type. Modern devices have a touch screen.

Overlockers also differ in the types of stitching. Everyone has different presser foot pressure.

Design and principle of operation

To understand how an overlocker works, you must first become familiar with its constituent elements. All products of this type must contain:

• built-in knives;
• a flywheel that raises and lowers the needles;
• loopers that form the stitch;
• needles;
• presser foot;
• telescopic stand;
• thread tension regulators.

Some models may contain other components and elements that facilitate use.

The principle of operation can be explained using the example of creating a seam of three threads, which is formed as follows:

• a needle and thread pierces the fabric;
• at the moment it reaches the bottom point, it begins a return movement;
• a loop is formed above the eye of the needle;
• hooks move along their own constant route;
• the needle secures the stitches and overcasts the edges.

The more threads there are, the more complex the process of creating a chain of stitches becomes.

Choosing an overlocker for yourself for home use, it is important to pay attention to its functionality, threading system, and the presence of a differential. You also need to think about the products that will be manufactured using the device. It is important to choose everything so that the density of the material matches the punching ability of the overlock needles.