There are many structures of a sewing machine, the most important of which is the hemming device. Without this thing, there is no way to trim edges at all. Therefore, we all need to take a look at how to install the hemming device. What are they? You need to know the methods so that you can install it properly and use it normally.
There are many structures of a sewing machine, the most important of which is the hemming device. Without this thing, there is no way to trim the edges. Therefore, we all need to take a look at how to install the hemming device. What are they? You need to know the methods so that you can install it properly and use it normally. In addition, you need to look at the principle of the sewing machine. Only when you understand its principle can you use it.
How to install the crimping device
The crimping device is commonly known as the pull tube. There are two screws and screw holes on the pull tube. There are also two screw holes on the flat car, just behind the needle plate. You can just install them directly. However, the presser foot is also matched with the pulley. There is also a hemming presser foot for rolling skirts, which has many specifications. , some are wide or narrow, you can find out by asking at a sewing shop.
It is a very practical auxiliary tool in sewing work. According to its functions, it can be divided into hemming function, hemming function, multi-layer sewing function, etc. The shape is large inlet, small and flat in outlet. There are no very fixed size requirements during processing, and processing is generally carried out according to the characteristics of the sewing materials. When installing, one side of the crimping device must be parallel to the machine plate, the discharge port points to the machine needle, and is aligned between the presser foot and the feed dog, consistent with the direction of the material. The closer the discharge port is to the presser foot, the better, so that the material rolled out by the crimping device can directly enter under the presser foot, and the sewing will not be distorted to ensure quality requirements.
Principles of sewing machines
1. Just like cars, the basic principles of most sewing machines are the same. The core of a car is the internal combustion engine, and the core of a sewing machine is the coil stitching system. The loop stitching method is very different from ordinary hand sewing. In the simplest form of hand stitching, the sewist ties a piece of thread through a small eye at the end of a needle and then threads the needle and thread completely through two pieces of fabric, from one side to the other, and then back to the original side. This way, the needle drives the thread in and out of the fabric, sewing them together.
2. Although this is very simple by hand, it is extremely difficult to pull with a machine. The machine needs to release the needle on one side of the fabric and then instantly grab it again on the other side. Then it involves pulling all the loose threads out of the fabric, turning the needle around, and repeating all the steps in the opposite direction. The process is too complicated and impractical for a simple machine, and even by hand it only works well with shorter threads.
3. In contrast, a sewing machine only partially passes the needle through the fabric. On a machine needle, the eye of the needle is just behind the tip, not at the end of the needle. The needle is fixed to a needle bar, which is pulled up and down by a motor through a series of gears and cams (more on this later). As the tip of the needle passes through the fabric, it pulls a small loop from one side to the other. A device underneath the fabric grabs this loop and wraps it around another thread or another loop of the same thread. In the next two sections, we will see how exactly this system works.
Based on the knowledge in this article, we already know how to install the curling device. The article has written out the steps for you. When our curling device is broken After that, you can buy a good one and install it according to the above steps, so that it can be used normally. In addition, we also looked at the principles of the sewing machine. We need to use it according to what has been said. .