Automatic overlock: working principle, function, types

Automatic overlock and rasposhivalnye machines - are instruments for overcasting edges of the fabric and the seam by seam. It differs from the standard type of sewing machine thread feeding, the use not two, but three or more reels.

Due to this possible overcast stretch fabrics like jersey. Overlock seams and rasposhivalnye used for areas, which account for the increased load as the pockets, fly, inner thigh area, shoulders.

The difference between the devices - in functional tasks.

The principle of automatic overlock

Sewing machines for textiles are divided into three types:

• overlock;
• Rasposhivalnaya machine;
• Koverlok.

Overlock - a device for sewing, with the help of which you are trimming and turning of the edges. Suitable for elastic and inelastic fabrics. In modern industry - the only means to work with knits.

The machine simultaneously cuts off the extra millimeters of tissue, making the hem flat and overcast the edge lines. Ability to work 3, 4 and 5 strands one seam. The machine performs 3 different types of lines.

With the help of overlock you can not do multi-line flat seams, which is also called rasposhivalnymi. To do this, create a separate device.

Rasposhivalnaya machine - a kind of machine for sewing stretch fabrics joint to joint. It is used for sewing of complex products and sectors, which account for a large load during wear.

The machine can not sweep off the matter, in its functional task is to connect the two parts of the future product. Basis durable seam - compound 3, 4 or 5 lines.

Koverlok - a device that combines the functions and rasposhivalnoy overlock machines. This is possible thanks to the fact that the basis of units is a common principle of operation is based on the details "looper".

Looper replaces the bobbin (part for the bottom feeders in the standard sewing machine with two coils), capturing the thread from the spool. This allows to create the desired loop length and diameter in a certain direction, connecting joints fabric or edge processing.

In devices of this type, two looper: for a few lines.

Design features

Overlock is a housing with a control unit and a narrow operating panel equipped with the needle and the blade. Automatic thread pitch - a useful feature, it reduces the cost of the absence of the device, but inhibits the sewing.

Rasposhivalnaya machine can not process the product the edge in its design does not include the blade. If you need a versatile device for use with elastic fabric, then pay attention to the combination of two types - koverlok.

All three devices operate automatically, it is enough to set the operating mode, set the type of joint and the number of active coils. cloth supply system regulates the speed of processing. Pre refuel coil.

Note the model with digital control that allows you to fully automate the process. Manual tuning devices requires professional skills and knowledge of the mechanism. Debugging devices is possible only at the service center.

Weight apparatuses from 5 to 12 kg, depending on the number of functions. The size of operation panel and coils. Apparatus for professional tailoring weigh from 8 kg.

Rasposhivalnaya machine is equipped with a wide planar working surface, a diameter of 10 inches or more. Professional equipment spaced along the perimeter to work with different types of joints, technical and decorative. The same panel and fitted koverlok.

The design incorporated a mechanism for automatic regulation and tissue supply cords have models with manual control, wherein the harder to create a smooth line. Automation makes it possible to sew the fabric and process with minimal error at hand.

Devices support additional features when connected accessories. Weight nozzles is not included in the total (5-12 kg).

Function automatic overlock

The difference between the devices - in functional tasks. At the core of the work is a single principle, but are devices for different purposes. Consider the details:

Overlock for:

• grinding the edges of the product strands;
• trimming the hem using a blade;
• treatment of the joints;
• working with other knitted and elastic fabrics.

Overlock creates lines that extend on either side that can handle jersey. Indispensable device for sewing shirts, jumpers, underwear.

Rasposhivalnaya machine is designed for:

• grinding of individual components of the product;
• creating obmetochnogo flat seam (processing neck gum on T);
• strengthen the product areas with increased load (pockets, fly);
• shaped seams decorative nature.

Functional features of any of the devices - the number of threads in the work. Overlock and rasposhivalnoy car found devices with 3 or more cords in the work.

There is a separate type for edging and joining parts on two lines - fletlok (2 or 3 coils that create "pseudo surround seam").

Line from 3 cords: mid-priced vehicles. It creates a base seam, suitable for standard processing of knitwear.

The first stitch of the needle creates a second - looper between a third loops are stitched thread. Line is designed to hold the edge of matter, which crumbles.

Stitching threads of 4: created by the second upper needle. It allows you to simultaneously process the edge of matter and sew together parts. Functionally switched to 3-line operation.

Overlock can grind two parts in a flat surface, the task is feasible and koverloku rasposhivalnoy car. Line of cord 5: there are three needles upper and two lower loopers. Feature is present in all three types of devices.

The chain line that runs machines with 3,4 and 5 strands that look like a pigtail. Do not be dissolved in case of interruption of one cords. Stitching is stretched with cloth, and maintain the shape of the weld and edge.

Standard unit performs 5-20 kinds of sewing operations. Prefer automatic devices with the maximum number of functions, if their price range - above average.

Pay attention to the automatic filling of the lower looper. Own procedure takes 5 to 10 minutes for each new change of cords.

Types avtomatichski overlokov

Overlock for the buttonhole and fabric edge design, rasposhivalnaya machine - for a flat mating parts and koverlok combines both functions. Between themselves, they differ in the number of tasks, and the operating coil of process automation.

Pay attention to when choosing such features:

• Automation thread supply, tension control and feed matter;
• foot lifting height - from 5 to 14 mm;
• waste tray: build tank for collecting cuttings;
• width and stitch length;
• speed of execution of tasks;
• step foot;
• built-in blade for cutting threads and excess fabric;
• Blades feature off;
• rasposhivochny seam (front side with stitches, purl - with overcasting);
• clamping tissue to the operation panel;
• role-seam - overcast delicate fabrics like chiffon (edge ​​curling machines);
• a built-in accessory tray and operating supplies;
• a removable tubular unit for processing the narrow portions;

When choosing a look for the cooperation of all these functions in a single automated device. A useful feature - color marking loopers and coils to independently distinguish the color of the future line.

An important indicator - the engine power and electric power consumption. Found index of 75 to 250 watts. When choosing a multi-model give preference to power 100-220 watts.

Overlock suitable for working with soft elastic materials, the edges of which are scattered and are designed to stretch.

Give preference to models with a built-in cutter, turn it off mode, automatic control lines and trays for garbage collection and storage of tools.

Rasposhivalnoe equipment for creating tucked edges where the front side is a smooth line, and on the underside - overcast. Prefer models with manual and automatic control seam indentation.

The surface should be wide for large articles.

Koverlok combines both types, but if the equipment is lower than the average price range, you can get a completely unusable to the tailoring of products instead of the universal appliance device.

operating rules

rules of operation depend on the type of equipment and spelled out in the detailed instructions. Note included in the package leaflet describing the operations of joints and configuring the device.

It replaces the tutorial and need to learn to work with a model of a particular manufacturer.

Basic rules of operation:

1. Ensure the integrity of the power cord.
2. When threading the needle and looper, make sure that the machine is de-energized.
3. Change operation only with raised tab;
4. To work it takes a lamp backlight. Without it, the machine can not start.
5. Use the operation and functionality for its intended purpose. It is not recommended to experiment with thick types of material if the equipment is designed for delicate fabrics.
6. Use the blade only when necessary to cut the edge. Disconnect function while creating cover hem joint to joint.

The basic rule - follow the instructions in the manual and do not exceed the operating parameters of the equipment.

Precautionary measures

Before you start, read the instructions. Examine the right filling needle and looper. Be careful when working with the blade, do not substitute the fingers and body parts under the work area.

Before you start, make sure the cord and plug are not damaged. The work area should be well lit by an additional light source, in addition to the built-in light bulb.

Do not wash the equipment with water. Do not install the equipment in close proximity to sources of water, put on a wet surface. Before you begin, wipe your hands with a dry cloth or towel.

During operation, wear shoes with rubber soles, recommended not to press on the pedal with your bare feet. Keep an eye on the general state of the device, time lubricate oil.

Do not lubricate the immediate work area, loopers and needles. Follow the instructions in the manual.

Faults and solution

A typical breakdown of sewing equipment - congregate rotation belt, a broken needle and a light bulb.

The first type occurs after the improper operation when the sewing mode is not selected according to the type of matter.

The second type of damage as a result of the failure settings. Give preference to the automatic mode in the first period of operation. Study recommendations on the choice of accessories, needles and tabs for specific types of fabrics and lines.

The device can not start. If the illumination lamp burns out or unscrew. Check before using her condition. All types of issues are fixed in the service center of the manufacturer.