The sewing machine tangles the threads. What to do if the bobbin thread gets tangled during machine sewing

Uniform and high-quality stitching of seams at any time can be complicated by the appearance of extra knots, irregularities on the stitches, layering them on top of each other with a violation of smoothness.

Looping the bobbin thread

An ideal seam is a line in which there are no loops that crawl out to the surface of matter from any side. The upper thread is passed behind the lower thread at the joints of the stitches approximately in the middle of the thickness of the layer (or several layers) of the material. Loops going up report looping bottom thread, and vice versa. The reasons why the machine winds are as follows.

• The thread on the bobbin is wound in bulk. Because of this, its tension fluctuates sharply and chaotically. The seam in this case comes out either ideal in some areas, then the upper thread is visible from below, then the lower thread is visible from above. Use the standard thread winder. If you work with a single-thread sewing stapler, you can make a bobbin winder based on a small battery-powered or accumulator-powered motor.
• The bobbin thread tension is not enough. The slot in the shuttle plate is set incorrectly. You will need to configure the shuttle itself. By changing the thread (thickness, material), adjust the hook itself. Check that the thread from the bobbin winds up with little effort.
• Upper thread is too taut. Adjust its tension with the regulator - it is marked with numbers on a round scale. Expose correct value- it must correspond to the thread itself and the performance of the sewn matter.
• The bobbin has chips, notches. The plastic bobbin is deformed. Change it to one that won't let you down for years. You can sharpen burrs with a file with a finely abrasive surface or the same sandpaper, remove burrs with a particularly hard knife (for example, a scalpel). It happens that damage to the bobbin is so minor that it is not difficult to smooth it out. If the cap and the bobbin itself are thoroughly beaten - in notches and gouges, then change these components. Bobbins and caps are often sold in a specialized sewing store, which is sure to be found in every more or less large city.

Perhaps, after all these checks and actions, the machine will work again normally, without deviations.

The machine chews the thread from below

There are a number of reasons why bobbin threading is confused.

• The thickness of the needle, thread and fabric to be sewn do not match.. Too thin needle will get stuck in thick fabric. Too thick thread passes through the eye of the needle with great force. Excessively thin material for a thick thread and a thin needle will lead to the formation of large holes into which the stitches can fall out, “pull up”, the seam will immediately change its evenness and perfection.
• A dull needle tears through the fabric. A twisted and uneven thread immediately twists, forming knots already during stitching.
• The rack is not properly aligned (as indicated in the instructions) in the area of ​​the teeth or web. The teeth on the rail became dull, and she herself suddenly began to move in the wrong direction. Most often, the latter happens when the needle has already passed through the material for the first time, and the shuttle worked in response.
• Thread tensioner defective or set incorrectly.
• The bottom of the sewing foot is broken or defective. The foot itself is excessively loose and loosely clamps the fabric, which is why it slides in different directions.
• The bobbin dangles in the cap, "walks", because of which the thread tension can also change in a "jerk" rhythm. Either the cap latch with the bobbin is broken, the bobbin dangles or even falls out.
• friction washer installed incorrectly on the main drive wheel.
• The thread tension does not match the thickness, stiffness of the material to be sewn.
• The bobbin thread leading from the bobbin to the hook suddenly broke. Before that, it can rush about within the entire bobbin (for example, if it is wound randomly), and the formation, retraction of the resulting loops of this thread into the fabric stops abruptly.
• Needle plate gap set incorrectly. In this case, the course of the needle, its passage through the tissue has a deviation from the norm.
• The upper thread itself is not threaded correctly.. The sequence that is indicated in the instructions is not observed.
• In manufacturing, the thread is twisted not to the left, but to the right. The “right” thread often twists in the wrong place, which causes the stitches to get confused and layered on top of each other, turning into something that vaguely resembles a ball of thread.
• Wrong design of spools or bobbins, an attempt to use thick and high bobbins for a sewing conveyor on a simple home machine.
• In the process of sewing, you pull up, push the fabric manually, as if forcing the machine to speed up and sew faster. It's impossible. Each machine has its own throughput (number of stitches per second, minute) - do not try to "cheat" a well-tuned and debugged mechanism. By practicing pushing and pulling fabric, you run the risk of tearing the fabric, breaking one or both threads.

Other reasons may be related with wear and tear, the final failure of certain parts of the machine. Worn out parts will need to be replaced. You can do it on your own by finding the desired part (or several parts) in the online store, or in the market in your city or district, or immediately contact a service center that repairs sewing and knitting equipment.

In electronic machines, incorrect operation can also be triggered by a failure or inadequate operation of the computer board.

Lower thread adjustment

So that the lower thread does not get tangled, forming a bundle, and does not crawl up, did not form overlapping knots of stitches, follow a series of steps.

• Check that the upper and lower threads are threaded correctly. If you notice inaccuracies or when there is no time to figure out where something was missed, pull out the upper thread and thread it again, carefully following the threading sequence. The sequence of threading the upper thread is most often as follows: the upper thread guide - the first part of the channel to the tensioner - the tensioner itself - the second part of the channel to the second thread guide - the thread is turned on it - the third part of the channel (if any) - the drop loop on the needle bar - the eye of the needle - the slot paws. Then take the thread to the side. Set the tensioner to the desired value using the regulator, which is marked with a circular digital scale.

It is useful to use the previously made marks - which thread and which fabric, which needle corresponds to the value on the tensioner adjuster.

• For the bobbin thread, pull out the bobbin case by lifting the hook plate of the hook compartment itself.. Check that the thread on the bobbin is wound evenly and neatly, that the thread itself does not run out (the bobbin would be almost empty). Re-insert the bobbin into the cap and turn the tensioner screw with a screwdriver - the thread should wind up with little effort. Make sure you use a smooth and elastic thread - a coarser thread, such as cotton fiber, would leave a "hair" in the tensioner and clog it over time. Insert and lock the cap with the bobbin - a click will be heard when it is fixed. Make sure the bobbin is seated securely, not dangling in different directions.

Pass the end of the thread through the gap in the needle plate, bring the end out 10-15 cm, bend it over the slot of the presser foot and take it to the side along with the end of the upper thread. Now try to sew an indicative seam on a test patch. Its quality (lack of confusion and chewing of threads, skipping stitches) will be immediately noticeable.

Repair of sewing machines should be carried out by an experienced and qualified craftsman, since not only knowledge is required, but also a special tool. However, often the sewing machine stops working efficiently due to the inexperience of the seamstress or non-compliance with the manufacturer's recommendations. It is enough, for example, to change the needle or thread, and skipped stitches will stop in the line.
This article contains all the typical and simple malfunctions of the sewing machine and suggests ways to fix them.

Choose one of the items that suits your "case" and read the simple guidelines. If these tips do not help to eliminate the malfunction of the sewing machine, at the end of each section there are links to articles on our website with a more detailed description of the causes of this malfunction and how to repair the sewing machine.

1. The upper thread breaks periodically

1. Wrong upper thread
The upper threading scheme is simple, however, mistakes do happen. The thread does not go between the pressure plates, sometimes it does not start in all fasteners along the way. But most often, it is inserted into the needle from the wrong side. This is especially true for older models of sewing machines such as Singer and PMZ.

Particular attention should be paid to threading threads when working on overlockers. The hooks of its fastening are not always "in sight" and having missed at least one of them, the overlock will constantly break the thread.

2. Top thread tangled
Most often this happens when cone bobbins are used. The thread jerks off the spool, releasing a lot of excess. The rest of it sometimes gets tangled behind the creel and the thread breaks.
Sometimes the reason for this is too much twist of the thread. Tie, next to the spool, the machine with a rubber band and pass the thread under it. Such a simple technique will "extinguish" the twisting of the thread and it will evenly be fed into the tensioner.

3. Upper thread tension is too tight
This photo clearly shows how to thread the thread into the tensioner, correctly passing it not only through the plates, but also through the compensation spring (curved wire).
At maximum tension (in this example, 9), a thin and fragile thread will definitely break.
With the presser foot lowered, the thread should be pulled out of the tensioner by hand almost freely, with only a little effort. If the machine does not sew well, for example, loops, at medium tension (4-5), then it needs to be adjusted by the master.

4. Coil installed incorrectly
The most common reason the machine breaks thread is the use of cone spools and spools designed to work only from the creel. The creel is an additional rack for spools, in which the thread will be removed not sideways, but upwards.

5. The needle is dull or bent
The bent tip of the needle is not immediately noticeable, but it can do a lot of harm. It will not only break the thread, but also tear the fabric when punctured.
A dull or bent needle can be easily identified by the dull sound of the sewing machine.

6. Wrong combination of thread, fabric and needle
If you sew coarse fabrics with a thin thread and a thin needle, then any machine will tear not only the top thread, but also the bottom thread.

2. Broken bobbin thread

1. The bobbin thread is tangled
If the lower thread breaks, first disassemble the shuttle. Perhaps you will find such a picture there.

2. The bobbin is not loaded correctly
Rarely does anyone pay attention to threading the bobbin into the bobbin case. The machine always sewed well, and suddenly, when sewing expensive and delicate fabric, it began to skip and break the thread.
Check if you are threading it into the bobbin case correctly. At the same time, it is advisable to focus on the refueling scheme of the instructions specifically for your typewriter.

3. High bobbin thread tension
Often it is not necessary to adjust the bobbin thread tension. To do this, it is better to loosen or increase the tension of the upper thread. But if you need to adjust the tension in the bobbin case, do it carefully. A half-turn of a screw is the maximum amount of time it can be tightened or loosened.

4. Wrong bobbin thread
The lower thread should not only come under the plate, but it must be wound between the "antennae", as in the right photo. Otherwise, it may jump out and get tangled in the shuttle.

3. Skipped stitches in stitching

Often, seamstresses use industrial needles instead of household needles. This necessarily leads to stitching defects, including skipped stitches.
Household needles have a cut on the flask, industrial sewing machines have round flasks.

It is difficult to insert a needle with a saw cut incorrectly, but just in case, you should know that the thread always starts from the side of the long groove. The saw cut of the flask is located on the reverse side.

2. Poor quality needle is used
A bent, rusty, wrong size and brand needle always results in skipped stitches.

The thread during the passage of the fabric experiences maximum tension. And if the eye of the needle is smaller than it should be for a given thread thickness, and the fabric is very dense, then a stitch skip is guaranteed, and sometimes a thread break.

4. No lint or thread has accumulated under the needle plate
Tows, pieces of thread, together with oil, compact the teeth of the conveyor rail so much that they do not allow the thread to pass freely and form a “good” loop for it to be captured by the shuttle spout.
It is best to clean this knot with a stiff glue brush.

5. Improper threading

4. Looping thread in the stitch, wavy stitch

1. Thread tension incorrectly adjusted
This is the most "harmless" reason. Just try to adjust the tension of both threads correctly, check that they are threaded correctly. If the result is the same, then some parameters of the sewing machine need to be adjusted by the master. And sometimes loops in the seam are a sign that the sewing machine needs complex repairs and adjustments.
There is another simple reason for the appearance of this defect. A piece of thread has fallen between the plates of the upper thread tensioner or a seal has formed from dust and lint. If the upper thread does not tighten well, disassemble the tensioner and clean it.
This is especially true for overlockers. Over the years of work, tensioners skip kilometers of thread and various kinds of seals accumulate in them, preventing the thread from being pressed by plates.

4. The fabric will collect when sewing

1. The thread tension is too tight
In addition to this banal reason, there is another. The presser foot strongly presses the fabric against the teeth, and the fabric is very thin. Correctly adjust the presser foot pressure on the fabric, and at the same time the height of the rail teeth, and you will no longer need to "help" the typewriter with your hand.

3. Threaded incorrectly

4. Wrong combination of needle, thread and fabric

5. Fabric moves unevenly

1. Stitch length dial set to minimum

2. Wrong combination of needle, thread and fabric

3. Wrong needle used

4. Tangled thread

5. Feed dogs lowered
For many machines, the rise of the rack teeth is controlled by a switch, do not forget about it.

6. Often the needle breaks

1. The needle is incorrectly installed

2. Wrong needle used

3. Wrong combination of needle, thread and fabric

4. You pull the fabric hard with your hand
The fabric cannot be pulled towards you by hand. Adjust the pressure of the presser foot on the fabric and the height of the feed dog lift, and the sewing machine will move the fabric by itself, without your help.

7. The sewing machine is noisy and slow

1. Thread lint, lint has accumulated under the needle plate

2. Insufficient lubrication of the machine

3. The drive belt is too tight
When you replaced the drive belt, you overtightened it. Adjust it so that when pressed with a finger, it flexes with force, but slightly.

The tangle of the lower threads in sewing machine is the most common problem for embroiderers. It happens for various reasons, but it always causes inconvenience - when stitching, a bunch of threads appears and the needle gets stuck in them. Why is this happening and how to fix the situation?

Why is the lower thread on the sewing machine tangled: reasons

• unsuitable needle in the machine, pulling thread and material (it should not be blunt or too wide);
• a bad rack that is not calibrated in the area of ​​​​the teeth or jumper;
• dull teeth on the rail;
• incorrect operation of the gear rack, its sudden movement when the needle has already pierced the fabric and started working;
• incorrect operation of the pressure spring as a result of damage or old age;
• broken lower part of the foot;
• defect on the bottom of the foot;
• loosely fixed bobbin to the design;
• incorrectly installed friction washer on the flywheel;
• too little or too much thread tension. Each fabric should have its own tension;
• breakage of the lower thread, which begins to constantly wind around the entire part of the bobbin and stop looping the fabric;
• an unsuitable hole on the needle plate that disrupts the work of the needle on the fabric;
• incorrectly tucked thread;
• unusual threads. Usually, the right-handed type of sewing thread leads to confusion;
• non-standard spools, threads or bobbins.

Bobbins are required to feed the thread from the creel and take them up. Each of them has a cone shape and is ideal for such work. When using a conventional machine, where the thread is fed to the left or right, the bobbin becomes uncomfortable because it is heavy and too wide in diameter.

Also, the causes of confusion are fanatical sipping or pushing the fabric with your hand - this activity will not only break the thread, but also lead to damage to the processed fabric. In this case, it is recommended to do a trial stitch on a piece of material before each sewing session to find the right fabric pulling pace.

Reference! Naturally, there are other reasons for the confusion of threads in a sewing machine, which sometimes occur while working with it. Basically, this concerns the wear of parts and breakdowns in the internal components of the machine, for example, the shuttle, the needle bar or the control unit.

How to adjust the bobbin thread yourself

Improper threading is the most common cause of a ball of thread when using a sewing machine. The first thing to do is to check that the filling is correct. This applies not only to the upper, but also to the lower thread. Refill both according to the instructions for the typewriter and try to work with the device again.

Also, confusion appears due to the fact that the threads are unevenly stretched: the upper one is adjusted using corrective plates, and the distance between them is determined using a switch that is installed on the device body. As for the bottom, it is regulated by the plates of the bobbin case. In order to adjust the tension, you will need to take a screwdriver, remove the foot and plate of needles, and then turn the bobbin case screw with a tool to increase or decrease the thread tension.

If the bottom thread does not hold the top thread, and during the operation of the machine it climbs up, then the stitches may look sloppy or completely confused. In this case, an increase in the tension of the lower one by shifting the plate is required. This is done by tightening the bobbin case screw. After tightening the screw, you need to check the operation of the machine. If everything is fine, you can continue to sew further.

The threads can become confusing due to the wrong location of the bobbin. To adjust everything, you need to use the instructions for the device. When repairing, a shuttle click characteristic of the typewriter will be heard.

If the tension is normal, but the sewing machine does not function well, the problem may be in the device itself. It may be faulty. Then, in order to adjust its work, you need to contact a master who knows how to repair sewing machines. Or replace the device with a new one. If we are talking about a small defect on the hook, then you need to remove the needle plate and visually assess what the thread comes across. To do this, turn the wheel of the lift lever, carefully remove the shuttle and look at it. If there are burrs, they must be removed with a scalpel or other sharp object. After removing the defect, return everything back and check the operation of the device.

How to properly thread to avoid tangling

The sewing machines produced are equipped with a step-by-step scheme that allows you to correctly thread the threads, and a logical design that everyone can figure out. Rotary devices are a little more complicated. Next, consider a few simple instructions that will help you learn how to quickly and correctly thread the thread without further tangling:

Instructions for threading the lower thread:

• insert the bobbin into the bobbin case;
• bring the thread into the slot of the bobbin case under the lamellar spring;
• insert the bobbin case into the hook;
• bring out the lower part using the needle hole at the top of the thread;
• thread under the presser foot and use the device.

Instructions for threading the upper thread:

• insert the thread into the body of the device;
• through it, take it to the design of the voltage regulator and to the right to the compensation spring, resembling a hook;
• then lower the thread to the thread guide, bring it down to the fastener and needle eye.

Attention! If you need to set up a manual machine, you must select the correct needle with the thread number for a particular fabric, and then adjust the thread tension. In another case, it will not be possible to fill the sewing machine without damaging the quality of the stitching.

To refuel correctly, use the following simple instructions from the manufacturer of Seagulls:

1. Turn the handle so that the device that attracts the threads is on top.
2. Insert the needle into the hole of the holder to the end.
3. Turn it to the rod, where the part of the foot is located.
4. Secure the needle with a screw.
5. Make the installation of the coil and threads on the rod structure.
6. Thread part of the thread into the friction washer with the thread guide.
7. Fix the needle holder by inserting the thread into a special guide.
8. Insert part of the thread into the needle eye area.
9. Insert the lower thread by winding it around the bobbin structure and threading it into the cap.
10. Fix the cap on the bobbin until a characteristic click.
11. To pull the thread, you need to turn the handle of the machine.
12. Put the threads under the bottom of the foot.

To adjust the thread tension:

• apply the screw in the bobbin case and tighten it;
• repair the tension with the lever adjuster that raises the presser foot.

Some tips for using a manual sewing machine:

• lower the needle under the foot in advance; you cannot make a seam;
• turn the handle of the device towards you, changing the direction of rotation;
• sew on a typewriter only those fabrics that are suitable for a manual typewriter. Otherwise, you can damage the fabric and the machine. You can learn about which fabric is suitable for sewing on a sewing machine by hand from numerous articles on the Internet. Basically, these are dense types of fabrics, not silk and satin.

In general, the bottom thread, like the top thread on a sewing machine, creates confusion and does not allow it to function normally due to improper thread fastening, the operation of some internal devices. Almost any breakdown in the sewing machine can be fixed both independently and with the help of an experienced craftsman. You can eliminate the confusion of threads yourself by following simple and understandable instructions, as well as using high-quality sewing parts.