What should I do if the sewing machine keeps breaking the thread? Please talk about the double needl

There are many situations of broken threads, such as the hook is displaced, or the tip of the hook is hairy. It's not a sentence that can be said in one sentence. There is no fixed situation.

thread, fabric. Needles. The mating time of the hook to the needle. There are no burrs on the hook. The easiest way is to add some silicone oil on top of the noodle line.

Reason: Improper fit between the hook positioning hook and the notch of the shuttle frame; Solution: Adjust the fit of the hook positioning hook so that the surface line can pass smoothly.

The method of coil stitching is very different from ordinary hand sewing. In the simplest form of hand stitching, the sewer ties a thread in the small eye at the end of the needle, and then threads the needle thread completely through the two pieces of fabric, from one side to the other, and back to the original side. In this way, the needle drives the threads in and out of the fabric, sewing them together.

Components:

Generally, the sewing machine is composed of four parts: the head, the base, the transmission and the accessories.

The frame is divided into two forms: platen and chassis. The platen of the tabletop frame plays the role of supporting the machine head, and is used as a workbench during sewing operation. There are many styles of platens, with one or more buckets folded Tibetan type, cabinet type, writing desk type, etc.

The chassis of the chassis frame plays the role of supporting and storing the machine head, making the sewing machine easy to carry and store.

The transmission part of the sewing machine consists of components such as a frame, a hand crank or an electric motor. The frame is the backbone of the machine, supporting the table and foot pedals. When in use, the operator steps on the foot pedal to drive the rotation of the pulley through the crank, and then drives the head to rotate through the belt.

Hand crank or electric motors are mostly mounted directly on the nose.

The above content reference: Encyclopedia - Sewing Machine.

There are many reasons for the thread breakage of the sewing machine, there are broken bottom lines and top threads, and I know more than ten or twenty now! However, the most common ones are the following: 1. The line will be broken if it is not adjusted well (the best way to adjust the line is to adjust the bottom line first, and the bottom line should be after the core is placed in the shuttle sleeve, hold the line in one hand, and the shuttle sleeve will slowly fall down, and then adjust the surface line according to the bottom line) 2. The presser foot will break the line if it is not adjusted well (there is friction between the presser foot and the needle when adjusting the pressure foot, and the hand should shake the presser foot left and right to see if it will touch the needle) 3. The gap between the shuttle bed and the needle tip is too large to break the thread (the distance between the hook hook and the needle groove should be when adjusting the shuttle bed, Smaller than is easy to break the needle.

4. If the cloth is too thick, the thread will break (tighten the screw on the top of the presser foot to make it have a certain pressure) 5. If the fabric is too thin, the thread will break. (When sewing, the presser foot goes out of the fabric and breaks the thread) 6. The needle bar and the shuttle bed will break the thread if they are not synchronized (when adjusting the needle rod, use the shuttle sleeve to put it on the needle board, and the needle bar is just adjusted to the height of a shuttle sleeve, and then adjust the shuttle bed) 7. The needle hole of the bur is too sharp and will break the thread (it is recommended to use a round head needle, but it is a little more expensive, hehe! ）.

This is the most common kind of disconnection, I won't explain the rest one by one, if you don't understand yourself, it's best to contact the sewing car shop where you bought the car, I wish you a happy !!

1. The quality of the thread is not good, we generally use 402 special sewing thread for sewing, if you buy some inferior sewing thread, you may encounter frequent thread breakage. Try a different line, and maybe your problem will be solved. 2. You still use that kind of thin sewing thread when sewing thick fabrics, and we know that there are several models of sewing threads, such as sewingJeansThe thread is thicker, while the sewing summer fabric georgette, silk and the like are thinner.

If you are sewing thick fabrics with fine threads, the threads will break. In such a situation, it is also necessary to adjust the matching relationship between your fabric and the thread. 3. There is also a problem with the sewing needle, if you buy a new needleEye of the needleIf there is a burr, then the thread is easy to break, and the broken place is around the needle.

The situation of breaking the line of argument can be solved.

First of all, the question of sewing threads.

Check the quality of the sewing thread. Moldy, deteriorated, or knotted sutures are most likely to break.

2.Check that the selected sewing thread matches the needle and nano. The sewing thread is too thin, the toughness is not enough and it breaks; If a thin needle is paired with a thread that is too thick, the thread will not pass through the pinhole smoothly and will be cut.

3.Check if the upper line tension is too tight. If the tension is too tight, it is easy to break.

4.Check whether there is any debris in the pinhole of the machine, and the sewing thread is broken due to poor conveying.

Second, the needle problem.

Check whether there is a phenomenon of fusing the sutures due to the heat of the needle, especially when using chemical fiber sutures, due to the high-speed operation of the sewing machine, the needle repeatedly punctures the fabric and heats up due to friction.

Fuse the chemical fiber sutures with a lower melting point. Check that the hook is in the right place. The hook is too close to the pinhole, and it is easy to pull the suture off when taking the suture.

2.Check that the hook is in the right place. The hook is too close to the pinhole, and it is easy to break the stitches when taking the thread.

Three. Miscellaneous questions.

Check whether the needle and needle board are installed firmly. Pine needles.

Or the needle plate will make the needle and the needle plate come into contact with each other, grinding out the cross-sectional line.

2.Inspect all the places where the line passes (including thread crossings, needle holes).

Hooks, needle board holes, presser foot holes, etc. There are no bends or chips to prevent the thread from being snagged off.

3.Check whether the bobbin winding is too full or uneven, the bobbin winding is too full or uneven, and the bobbin conveying is not smooth, which is easy to cause the bottom line to break.

4.Poor gestures or unrhythmic speed during operation may pull the fabric, cut the top line by the cloth teeth, or make the thread hook move up and down unevenly, and pull off the section line.

Hello pro let you wait for a long time, sorry, first of all, pay attention to check whether there is a problem with the machine settings, reply to the initial value of the computer board setting, and then set it again. 2. Secondly, check whether the inverted needle electromagnet is damaged. Again, pay attention to whether there is a problem with the sensor if there is a problem with the dry liquid, and see if there is a problem with the sensitivity of the sensor.

3. In addition, if the screen is turned off, there may be a problem with the output of the computer scum control. And if it is mechanical (manual), it may be that the switch contact is not good. 4. There is also a change of control panel to try, if it doesn't work, change the computer control box.

What is the situation when the flat sewing machine does not have the reverse needle and the thread break at the same time Dear, hello <>

The elimination method can be used to find out the cause of the fault step by step. If there is an automatic return to the needle, you can find the cause of the fault and the solution from the following aspects. 1. First of all, pay attention to check whether there is a problem with the machine settings, reply to the initial value of the computer board settings, and then set it again.

2. Secondly, check whether the inverted needle electromagnet is damaged. Again, pay attention to whether there is a problem with the sensor and see if there is a problem with the sensitivity of the sensor. 3. In addition, if the screen is turned off, there is a sensitive section that can be caused by a problem with the output of the computer control.

And if it is mechanical (manual), it may be that the switch contact is not good. 4. There is also a change of control panel to try, if it doesn't work, change the computer control box.

During the use of double-needle sewing machines, the problem of thread breakage is often encountered, especially the broken thread of the left needle. The reason is that because the rotation direction of the left-handed shuttle just forms a twist on the spin line, so the theory requires that the left-hand needle should use a right-handed thread, so that the suture is not easy to produce a twist. Due to the high price of the right-hand shuttle, the most actual stitching used by the general garment factory is the left-hand thread, so it is necessary to make the necessary adjustments to the machine to meet the production needs.

Let's take a look at the reasons for the breakage of the double needle sewing machine.

1. For the old muscle apparatus that has been used for a long time, it should be checked whether there is a wire groove that has been strained by the thread at each passing part, such as the wire hole of the wire pick-up rod, the tooth hole of the cloth feeding, the needle plate, etc., and if there is, it should be repaired or replaced with new parts in time.

2. Check whether the movement of the needle and the feeding cloth match. The standard position is that when the arrow on the synchronous pulley of the lower shaft is aligned with the engraver point of the casing, the needle tip of the machine is just lowered to the upper plane of the needle board, and the feeding tooth is consistent with the height of the plane on the needle board. This synchronization position is very important, if it is not synchronized, you can remove the Tongwang imitation stepping belt, turn the synchronous wheel and the pulley to adjust to the standard position and then replace the synchronous belt.

3. When the needle rises millimeters from the bottom dead center, the hook tip should be in the center of the needle, and at the upper end of the pinhole millimeters, by adjusting the hook position and the upper and lower positions of the needle bar.

4. When the needle enters the feeding tooth hole, the needle should be in the center of the feeding tooth. Carefully check whether there are scratches in the wire crossing part of the feeding tooth hole and the needle board and ensure that the needle board is notched in the hook inner tank stop to maintain a millimeter gap, if the gap is too small, the suture will not be smooth, if the gap is too large, the needle board will not be able to fix the hook liner. 5. After the adjustment of each mechanism, put on the sutures correctly, and keep the elasticity of the wire pick-up spring on the thread clamp moderate.

Place the fabric under the presser foot and turn the pulley by hand to carefully observe whether the stitches are turning smoothly in the hook. If you use a thick thread such as 30 3, you can grind the upturned tail on the moon circle shorter, and use the sutures to rotate more smoothly in the hook, which is conducive to the retraction of the thread. When using thick wires, it is recommended to make thick material hooks, and the time of opening and closing the shuttles should be accurately adjusted according to the sutures.

6. When sewing thick materials, the needle will produce heating, and in serious cases, it will smoke and burn the stitches, etc., at this time, silicone oil can be used to cool the needle and reduce the sewing speed appropriately.

In the actual maintenance of the Danling stool, it can be adjusted accordingly according to different fabrics and process requirements. The above is about double needle sewing machines.