Janome sewing machine malfunction

Why loop the lower line on the sewing machine?

Starting work on sewing machines, it is necessary to check their readiness. To do this, you need to perform a trial line on a small flap of fabric. This condition must be met for any type of sewing machines (mechanical, electromechanical, with computer control), regardless of the manufacturer. Even a perfectly working machine may have malfunctions. In most cases, small problems of sewing machines arise, which can be eliminated independently, having previously found out the causes of the malfunction. The most common problem is a violation of the quality of the line, the appearance of air loops.

Work on sewing machines begins with refueling threads. Models of sewing machines can have structural features of the structure, but the rules for refueling threads remain unchanged. The refueling of the threads is carried out in the off state of the machine with the paw raised. First, refuel the upper thread, and then the lower in accordance with the instructions developed by the manufacturer of sewing equipment. There are several options for impaired seam quality:

• The upper line remains even, and loops are formed from the back of the back. This defect gives the impression that the problem with the tension of the lower thread, but this is not so. Actually loop the upper thread. If you increase its tension, then the defect will decrease or disappear.
• Loops on the upper side of the part, with an even line from below. This indicates a defect in the refueling or tension of the lower thread, which is located in the shuttle.

There are many causes of these malfunctions, so it is necessary to check all possible options.

The lower thread loopes

If the loops are on the top of the fabric, then this is loop the lower thread, and this may have several reasons:

• The threads in the bobbin are wound unevenly. This can happen if you manually wound the thread on the bobbin, and did not use a special device in your sewing machine for this. The unevenly laid thread in the bobbin will also be unevenly unwound and this leads to looping the lower thread.
• Too weak tension of the lower thread. This happens if the plate’s gap on the cap is not adjusted and you need to configure the shuttle of the sewing machine. Each time, changing the thickness of the thread or its quality (lavsan to cotton or vice versa), it is necessary to adjust the shuttle. It is done simply: take the cap along with the bobbin in the hand by the tip of the thread. Under the influence of its own severity, the thread should not be unwound only if you shake your hand slightly-then the thread should stretch out by 10-15 cm.
• Too tight tension of the upper thread. On all models of sewing machines there is a top.thread tension regulator. It is used every time the thickness of the fabric changes, the size of the thread or their quality. The numbers on the regulator indicate the strength of the tension, try to loosen it.
• Poor spuling. Sometimes it is not possible to find the cause of the loop, and the whole thing is in an inconspicuous detail. the bobbin. It is only worth replacing it with a new one, how the car stops acting up and gives out an even, beautiful line.

The fabric is not moving badly

To make the line even and beautiful, matter must move without “jumps” and failures. No need to independently pull the canvas with your hand, t.to. This also negatively affects the quality of the lines and creates a load on the needle mechanism. Why does matter move badly:

• insufficient pressure of the material with a paw, the sole of the paw can be uneven/skewed, so it does not press on matter;
• The rail of the apparatus is installed on embroidery or cloves are too lowered down and it does not clear the canvas;
• From long operation, the teeth of the rack dug up.

A very high location of the rack cloves can lead to tightening or “landing” of a fabric cloth.

The lower thread loopes

If the loops are on the top of the fabric, then this is loop the lower thread, and this may have several reasons:

• The threads in the bobbin are wound unevenly. This can happen if you manually wound the thread on the bobbin, and did not use a special device in your sewing machine for this. The unevenly laid thread in the bobbin will also be unevenly unwound and this leads to looping the lower thread.
• Too weak tension of the lower thread. This happens if the plate’s gap on the cap is not adjusted and you need to configure the shuttle of the sewing machine. Each time, changing the thickness of the thread or its quality (lavsan to cotton or vice versa), it is necessary to adjust the shuttle. It is done simply: take the cap along with the bobbin in the hand by the tip of the thread. Under the influence of its own severity, the thread should not be unwound only if you shake your hand slightly-then the thread should stretch out by 10-15 cm.
• Too tight tension of the upper thread. On all models of sewing machines there is a top.thread tension regulator. It is used every time the thickness of the fabric changes, the size of the thread or their quality. The numbers on the regulator indicate the strength of the tension, try to loosen it.
• Poor spuling. Sometimes it is not possible to find the cause of the loop, and the whole thing is in an inconspicuous detail. the bobbin. It is only worth replacing it with a new one, how the car stops acting up and gives out an even, beautiful line.

Determination of a problem thread

Before starting work, regardless of which typewriter it will be carried out, it is necessary to refuel workers. The principle of operation for all devices will be identical. Preparation must be carried out on the device on, the foot should be in the upper position.

The first should be refuel the upper thread. Twist the lower one. How to do this. it is better to look in the user guide to a specific machine model.

Problems with threads can provoke the following seam defects.

• With a high.quality, even upper line, the lower loop. It may seem that the wrong (lower) thread is incorrectly tilted incorrectly. Actually goes down and forms the hinges of the upper thread. The situation can be corrected by increasing its tension.
• On the contrary, the appearance of loops at the top occurs with a high.quality lower line. Here the problem lies in the thread coming from the shuttle. It is necessary to adjust its tension.

If you cannot correct the situation with a simple adjustment of the tension, it is worth considering other reasons, check all possible options.

The upper thread loopes

If it winds the bottom of the fabric, then this loop the upper thread. In this case, there may also be several reasons:

• Too weak tension of the upper thread. The tension regulator of the upper thread, which is on all sewing machines, increase the thread tension. At the same time, check for: does the needle size correspond to the size of the thread.
• The overlaid regulator closed the upper thread. Over the years, dust, tissue fibers and pieces of threads could accumulate between the washers of the regulator. All this prevents the upper thread correctly clamping, which leads to its winding. It is necessary to monitor the cleanliness of the shuttle mechanism and regularly clean it with a hard brush.
• Too tight tension of the lower thread. About how to check whether the tension of the lower thread is adjusted correctly, cm above the section “too weak tension of the lower thread”.
• Wear of the plate spring of the cap. In this case, the thread clings to the zabina on the metal and stretches poorly. It makes no sense to repair it and regulate it, you need to replace it with a new cap.
• Failure of the threader. Follow the thread of the thread in the car. perhaps it clings to the metal burr of the filamentor. Then it needs to replace it or repair.

How to cope with the loop of a machine

As you already understood, there are reasons with which needlewomen can cope on their own. For example, choose the right needle or thread, regularly clean and lubricate the equipment. But still, most of the reasons that lead to a poor-quality line are rather complex. They cannot be eliminated independently. Therefore, it will be correct to turn to professionals.

Service masters have extensive experience in the repair of sewing machines JUKI, Veritas, MerryLock, Jaguar, Singer, Husqvarna, Aurora and other brands. The presence of your own spare parts warehouse will accelerate the repair. And the opportunity to call a master for repairing a house or production will save you from the need to deliver a machine to the workshop. To do this, you just need to fill out a special application form on the site or call by phone.

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