Overlock does not capture the left needle thread

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Why can an overlock skip stitches

Overlock. Complex and multicomponent equipment, which only a professional master is capable of qualitatively. The most frequent causes of non.Betrayals in the operation of the overlock are not problems with the mechanisms inside the equipment, but an incorrectly stretched thread or poorly selected needles. That is, the factors of the interaction with it of the master himself.

To determine the exact reason for the passage of the stitches and the further scheme of actions to eliminate this trouble, we must first have an idea of ​​how an overlapping seam is performed.

If the overlock is three.Minute, the stitch is obtained using the operation of one needle and two buttonholes. Overloks created for treating knitwear carry out four.Minute stitches, where two needles and two buttonholes are involved. When setting up the tension of the threads, one must understand the direction and purpose of each of them. Which is associated with the needle, which with the buttonhole and which particular. Then it will not be difficult to find out which of the threads is poorly tuned and to blame for the formation of a poor.Quality line.

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The curvature of the needle

Even the slightest curvature of the needle can lead to deplorable results. Therefore, there is nothing easier on how to change needles. To do this, we turn off the screw holding the needle and insert a new flask from us and fix it with a screw. This must be done with all needles, although, at first glance, they seem new.

Remove the foot and examine the needle plate. Two guides must be working. The metal plate should be polished, there should not be a single burrs on it. Pass the plate with a fingernail. If you feel roughness, then the surface needs to be polished.

Typical overlock malfunctions

  • Lower the needleman
  • Put a needle suitable for a given apparatus
  • The thread is strongly clamped by the regulator
  • The needle when lowering is in contact with one of the buttonholes
  • Weaken the tension of the thread
  • Lower the needleor down, unscrew the coater clip screw, push it 0.5 mm to the side
overlock, does, left, needle, thread

As already mentioned, the overlock is quite a technically complex unit. It is difficult to even configure it correctly. And there is nothing to say about the repair. Independent and high.Quality repair of sewing equipment with your own hands is practically impossible. Therefore, if the overlock does not make the chain, seek help from specialists. Masters of the Suriere service center have extensive experience in the repair of sewing machines of both Russian production and foreign brands.

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Why does Overlock not make a loop

A blurred or curved needle may be the reason that the device does not form a loop. By the way, most often the needles of poor quality dull. If the steel is good, it will be more likely to break off. The pointed point can be the cause of more serious malfunctions. Когда она тупится или искривляется, то меняется величина зазора между ее кончиком и петлителем. The looper stops capturing the thread, and the overlock does not surrender the fabric. The gaped needle needs to be changed for high.Quality.

The needle is not suitable for your model. When installing a new, pay attention to which needle was installed initially. Only certain components are suitable for each type of overlocks. Their size and type are indicated in the instructions for the machine. When installing an inappropriate needle, the device does not loop.

Low.Quality or inappropriate threads. Not all threads can be used to work on the overlock. When refueling the machine, it should be noted that all threads should be one thickness. Thick threads are not suitable for fixed devices. The most suitable threads on conical bobbins, they are distinguished by elasticity and strength, which allows you to qualitatively process the edge of any product.

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DIY Overloks setting and repairing and repairing.

Overlock even household is much more complicated than sewing machines and configure it, especially, to carry out an overlock repair without special knowledge and skills is almost impossible. However, overlock repair or adjustment is not always required, sometimes it is enough just to adjust the tension of the threads and it will again be high.Quality wrapping in the fabric. Some overlocks are very sensitive to setting up the thread, and when switching to others in quality, you have to reconfigure their tension.

Some instructions provide for the repair of the overlocks, their adjustment and the settings of the installation of loopers and needles are given in the event of a malfunction of these gaps or the replacement of the buttonholes. As a rule, they are indicative, ideal. The master who performs the repair of overlocks has to experimentally bring them to the desired value, so this type of repair is recommended to a professional.

All our recommendations in the Overlok Repair Service section are generalized and are suitable for any overlock model, but do not forget to carefully read the instructions for your model, where you can find information on configuration, lubrication, needles and more.

Passes and a deaf knock. A needle swept or bent

If you have gaps or a deaf knock. This is more likely to swept or a needle bent.

Defects of the tip of the needle: A. Stupid cut; b. Curved tip; in. Normal point.

Dumb needle can cause many problems. The needle for the overlock is a very important detail, many parameters depend on its condition, in particular the gap of the needle with the buttonhole. The main parameter of the estimated line without gaps. The dull needle can be determined by running the thumb with the right hand along the needle from the flask to the end. The nail will definitely find a curved place on the tip. Can be used to inspect the magnifier.

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If the needle is bent, do not try to straighten it, the overlock settings are very accurate and do not allow the use of such needles. To check the condition of the needle, put it with the flat side on the flat surface.

Inspect the needle from above and from the sides: 1. Parallel clearance. 2. Flat surface (glass and t.P.)

Use for overlock only the needle recommended by the plant

Pay special attention to what type of needle is installed in your overlock. Required condition. The use of only recommended by the manufacturer of needles.

overlock, does, left, needle, thread

In addition to the fact that needles can be with a round or sawn flask, they can still differ in the length and thickness of the flask, the length of the needle itself and other parameters. If in your overlock, needles with a round flask are used, you need to put a needle with the same thickness and length of the flask when replacing. The dimensions and types of needles used are indicated in the instructions, sometimes they are on the sticker inside the overlock. It is best to write down the type of needles on a small piece of paper and glue it with transparent tape on the case. In any household overlock, the needle is installed with a long groove. On itself, or the sawn part of the flask. Push. You should definitely install a needle all the way, and if you have two needles, then they are located with a displacement (one above the other).

After long work, you should clean the compartment of the buttonholes and other affordable places from scraps, shutters, etc.P., preferably a hard hair brush (for glue).

The thickness and elasticity of the thread for overlocks play an important role

Threads for overlocks play a crucial role in the process of formation of a regional savor. If you use threads of different quality or thickness. This will immediately affect the tension and therefore will change the drawing of the line. Overlock is very sensitive to tension, and the slightest change in one thread can affect all the rest. It is ideal to use the threads of the same brand, changing only colors. But in practice, this is rare, therefore, when replacing threads with another type or thickness, we recommend weakening all tensioners and at the very slow speed, gradually increase the tension of each thread, periodically checking which thread, and how much, pull up. Sometimes, when setting up a line of overlock, you can use different colors of the thread, for the clarity of adjustment of the tension of each, and then install the necessary.

Try not to use x \ B or thickened threads. The thinner and more elastic the thread, the easier it passes in the hidden fabric, needles, buttonholes and a high.Quality line.

Overlock lubrication should be paid more attention than a sewing machine

Lubrication of overlocks should be performed at least 1 time every six months, and with intensive use 1 time per month. It is advisable to use a medical syringe for this, instead. A long needle can always crawl into hard.To.Reach places, and spend less oil. Excess oil in the needle area can ruin the processed fabric. Try to carefully lubricate the nodes that have contact with the fabric. The instructions include a lubricant scheme, but you can make it a rule. Lubricate any available places where there are friction of metal parts, even if they are not indicated by the factory. In order to carefully grease all the overlock nodes, sometimes it is necessary to remove the protective covers of the case, but if it is difficult to remove them, you can do with factory lubrication marks for lubrication. The grease of the overlock should be paid more attention than the sewing machine, since the overlock works at high speeds and the lack of lubrication in some nodes leads to their overheating and even jamming.

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List of the main faults of overlocks:

The fabric does not move: the pressure of the clamping paw is too weak. If the fabric is too thin, then the pressure must be reduced, otherwise the fabric will be collected. When hugging thick fabrics, the clamping of the paw should increase. Basically, the paws should not be changed if there is no obvious need for this.

Why does an overlock do not sew

A blurred or curved needle may be the reason that the device does not form a loop. By the way, most often the needles of poor quality dull. If the steel is good, it will be more likely to break off. The pointed point can be the cause of more serious malfunctions. Когда она тупится или искривляется, то меняется величина зазора между ее кончиком и петлителем. The looper stops capturing the thread, and the overlock does not surrender the fabric. The gaped needle needs to be changed for high.Quality.

The needle is not suitable for your model. When installing a new, pay attention to which needle was installed initially. Only certain components are suitable for each type of overlocks. Their size and type are indicated in the instructions for the machine. When installing an inappropriate needle, the device does not loop.

Low.Quality or inappropriate threads. Not all threads can be used to work on the overlock. When refueling the machine, it should be noted that all threads should be one thickness. Thick threads are not suitable for fixed devices. The most suitable threads on conical bobbins, they are distinguished by elasticity and strength, which allows you to qualitatively process the edge of any product.

Universal algorithm for adjusting threads

You should start diagnostics with the inspection of the case. It is necessary to check if there are gaps or backlash. Further actions:

  • Make sure that the refueling procedure was correct.
  • Install the tension of the threads in the starting position, and then gradually loosen the tension by half a step (reduce from 3 to 2.5 and so on).
  • Do not use problematic material (it is best to configure the seam on a cotton flap: calico, flannel) to understand what the problem is in fabric or threads.
  • Replace the threads with more suitable.

The user himself will fully cope with this. If the steps listed above did not lead to a positive result and the overlock is tearing the left thread, as before, it is necessary to contact the master.

Restoring the performance of sewing machines and overlocks is a complex process that requires the repairs of special tools and impressive experience. The faulty apparatus requires complex diagnostics and high.Quality tuning of the shuttle compartment and motor. It is difficult to fix the internal nodes of the sewing device independently, because the repairs should understand the principle of their work. Therefore, if your overlock tears the lower thread (or any other), you must contact the service center.

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