The handwheel models do the same thing except that they do not have a treadle for you to use. All the parts of the sewing machine are moved by hand and are constructed in basically the same manner with belts and gears to move those important moving parts.
All the electric models do is use electric power to do the same job. These versions of the sewing machine take away from your manual effort and save you a lot of energy. In all models, there should be a rotating cam shaft that handles all the movement of the parts placed after it.
The shaft is turned by the treadle, hand wheel or the electric motor. In a nutshell, that is the working principle of the sewing machine. We will only do a step by step description for the electric sewing machine. The foot and hand-operated models work in the same fashion but may have fewer parts and no motor.
The step by step instructions are basically the same for all models with a few modifications. First, find the power switch. They are not always in the same place but usually, they are located on the right side of the machine. Third, bring your thread from the spool through the thread guide. This is a little piece on the top of the machine not to far from the spool pin.
Fourth, to the right of the spool pin is the bobbin winder and bobbin winder stopper. Make sure your bobbin is in place and the thread attaches to it for rewinding. Fifth, if your machine has one, turn the stitch adjustment dial to the type of stitch you want to use.
Sixth, take your thread through the thread take-up lever. This is usually on the left side of the machine. Seventh, the next thing you need to do is adjust the thread tension dial to get the tension you need on your thread and for the sewing machine to work properly. Eighth, thread the needle and get the thread to al the other parts on your sewing machine. Ninth, set up your underneath bobbin to make sure you have the thread you need for your stitch selection.
Not every machine will be as simple as this to use. There are many models with lots of bells and whistles you need to attend to before you get your sewing project under way. The key to your successful operation will be to make sure you read your instruction manual first.
That way you will get all the details you need to make sure your sewing machine is prepared just right. First, you need to know what a bobbin is before you can understand how it works. What the bobbin does is provide you with the underneath thread when you do your sewing. You can use the same color of thread on your bobbin as you have on your spool or change the color for special effects or if the thread will not be seen.
Second, the bobbin can be made from a variety of construction materials. They can be made of stainless steel, other metals or plastic and they run about 1 inch in diameter. That is usually there standard size. The ready to use bobbins come with thread already wrapped around its spool.
Once that is done, place the bobbin on the winder and put the winder stopper in place against the thread. Wind the thread a few times around the bobbin before you start sewing. If you have an underneath bobbin holder, drop your bobbin in there and pull the thread out a few inches. If the hook reaches the loop too early or too late a stitch is not created. Learn more about Sailrite Sewing Machines, how they work, and all of their great features in our sewing machine category.
Be the first to Write a Review. Javascript is disabled on your browser. To view this site, you must enable JavaScript or upgrade to a JavaScript-capable browser. Quantity discounts available. Quantity Price. The motor's rotation drives a belt [2] stretched between two disks.
This hand wheel [3] is connected to the upper drive shaft [4]. A drive shaft is a cylinder of any length that rotates on itself, in order to transfer movement from one area of a machine to another. In the case of sewing machines, the upper shaft transmits movement to two components:. The bottom mechanism [9] is made of the bobbin case and its lower thread which forms the knot with the upper thread , and the feed dogs that move the fabric between stitches.
A complete stitching cycle depends on the sewing machine's power, but considering low-end models run at rounds per minute i. Note that the motor power also determines how much strength is given to the needle, enabling it or not to stitch through thick fabric. Therefore it's important to choose a sufficiently powerful machine. Edit: In response to Didier's comment French version , here's a video that really goes into detail.
It gives a super clear explanation of what goes on in a sewing machine and you can follow it even if you don't understand the words:. Oops something went wrong and your comment couldn't be posted. Please enter a valid email address Post Paul on December 18, Home Sewing machine How does a sewing machine work? How does a sewing machine work? A sewing machine's mechanism is based on 2 main principles: Double-threaded stitching.
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