Proper operation of the sewing machine may not cause any problems for a long time. But at a certain point, the thread begins to break continuously, which significantly reduces the quality of sewing products. In this case, it is necessary to identify and correct this situation. The main reasons why the machine begins to tear the thread, many.
Causes of the upper thread breakage
The thread may break for the following reasons:
- The most common cause of rupture is a very strong stretch. In this case, the plexus of threads begins to occur on top of the material.
- A loose stretch can also lead to rupture. In this case, the thread gets tangled in the shuttle and it breaks.
- Incorrectly installed needle. If the needle begins to come into contact with the walls of the hole of the needle plate, then the thread catches on its edges, which will certainly lead to a break. This problem also causes frequent needle breakage.
- Breakage may occur due to improperly installed spring in the tension adjuster assembly. Large coils of the spring must be located as close to the housing as possible and the spring should easily move inside the regulator.
- During an improperly assembled tension regulator, breakage also occurs.
- The sharp edges on various parts of the sewing machine can cut the thread, this leads to tearing. To get rid of this problem, it is necessary to process the working parts with a small file.
- Sometimes the problem is hidden in the spool cap. If it is pulled very tightly, this leads to rupture of the thread. The sewing machine also starts to malfunction if the cap is dirty.
Attention! There are a lot of reasons why a thread break occurs. As a rule, the reason for this is the incorrect installation of various parts. In this case, the sewing machine incorrectly fixes the thread and chews it, this, in turn, leads to rupture.
How to fix the cause yourself
The most common causes of breakage are misused materials. In this case, it is only necessary to review all the threads and needles for marriage, and change them.
You also need to check the thread tension. A properly adjusted tension must weave the thread from the inside, and not from the top of the material. It is best to adjust only the upper thread tension. The lower part is only regulated in emergency situations.
If the screed becomes tightened and the material begins to wrinkle, then this is also due to improper thread tension. In this case, it is necessary to adjust both the stretch and the length of the string. For thick material, the length must be increased, for thin material - reduced.
If the tension is normal, then you need to check whether the needle gets into the hole in the plate correctly. Why slowly turn the wheel, and using a magnifying glass, make sure that the needle does not touch the walls of the hole.
Make sure the spring is in the correct position. If the main part sticks out in the wrong direction, then it must be deployed. If the slot is too tight, unscrew the nut a little.
You also need to make sure that the regulator that controls the voltage is properly assembled. Why do you need the instruction manual for the sewing machine. It is necessary to pay attention to the correct arrangement of the parts, and to which side they are deployed.
It is not uncommon for a thread to break after disassembling various parts of the sewing machine. As a rule, the problem consists in improper fastening of the pusher - if this part is accidentally installed in the other direction, when the flattened part of the pusher is turned to the lever, then this will necessarily lead to a break. Sometimes this element is not installed at all. You also need to pay attention to the squeezing washer, probably it is also improperly installed.
If the machine has recently been disassembled, you need to make sure that all the elements are in place, they are not deformed and securely fastened. If any part is missing, then it must be ordered.
Important! Most often, you can fix the thread break problem yourself. But if, after all the measures taken, the problem still remains, then you need to contact the customizer.
How to adjust the upper thread
First, find the tension adjuster. On different models of cars, it can be in different places, if you do not know in which specific place the regulator is located, then use the instructions for the machine. If there are no instructions, then you need to find a knob with numbers that is not responsible for choosing the type or size of stitches.
To increase the tension, the regulator must be turned in the direction of increasing numbers. Try to rearrange it by half-division or by one digit, and then check how the screed turns out on a piece of fabric. Adjust until the upper thread is no longer visible on the back of the tie.
To reduce the stretch, you need to scroll the knob taking into account the decrease in numbers. Continue adjusting until the screed is perfectly even.
During the breakage of the upper thread, it is necessary to carefully monitor the operation of the sewing machine and fix the problem, eliminating the initially wrong choice of needle and fabric. Before contacting the adjusters, work on a typewriter using different needles, threads of different quality on different spools, make sure that the malfunction does not appear after self-tuning or repairing the equipment.
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