Most modern sewing machines today are electrical devices. Although there are a handful of mechanical sewing machines out there, most professionals prefer to use a machine with electrical power to allow for faster, more accurate sewing.
In an electric sewing machine, the most important component is the electric motor, which sits near the power cord in your device. This motor drives a selection of crucial mechanisms that operate in quick succession with each other. These mechanisms include cranks and cams, the feed dog, and the presser foot responsible for holding the material in place. The motor in your sewing machine drives three distinct functions which allow you to sew clothes and other projects.
These are:. The needle and thread mechanism for your sewing machine is a metal drive shaft that drives a wheel and crankshaft to cause your needle to rise and fall over the plate.
The crank moves the motor rotary around, allowing for an up-and-down chain stitch motion. The bobbin thread and shuttle mechanism are made up of a hook device that must move slightly faster than the needle.
The system works by moving upwards and forwards at the same time, essentially pulling your fabric forward. If you removed the casing on a sewing machine, you would discover a lot of interconnected devices that are connected to make the device work.
Sewing machines are often more intricate than many people realise. Every component of the machine needs to work with the correct coordination and timing to make your machine work. The mechanisms mentioned above are powered by the electric motor and created in such a way that you can make equal-sized stitching, without relying on your hand.
Omg omg omg I got a new sewing machine as a gift from my sensei.. I graduated to medium level machine. Its a completely new machine. When you switch a sewing machine on, after threading your needle, the needle will start high and move down towards the fabric as you begin to sew. What the needle is doing at this point is feeding a length of the top thread through the fabric to create the next stitch.
The needle thread is tightened a bit to avoid pulling the thread too fast. As the needle punches the material, taking the top thread with it, the shuttle underneath the fabric rotates, and the hook on the end approaches the needle thread.
As the needle begins to rise again, it leaves a loop of top thread to start the next stitch. The shuttle hook can pass through the loop and the needle continues to rise.
Underneath the fabric, it is dragging your top thread around, so it locks around the thread from the bobbin. The needle will tighten the top thread and pull it off the shuttle hook again.
For example, the manual foot-powered style of sewing machine uses a treadle and belts to move the different gears and move the needle and the feed dog, bobbin feature as well as the shuttle hook and the other vital sewing machine parts. 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.
This is his technique: 1 Double-threaded stitching A handmade stitch is made by passing a needle all the way through the fabric, pulling a single thread in its wake. Here's a slow motion gif animation of how a sewing machine works: The needle tied to the spool thread or upper thread pierces both the fabric and the needle plate below it.
The needle then rises a little so that the thread, pushed against the underside of the needle plate, folds into a loop. The loop is caught by a rotating hook the bobbin case which widens it and makes it circle the case and the small bobbin within. This bobbin supplies the second thread also called lower thread. When the hook's rotation is complete, the lower thread is caught in the upper thread's loop and together they make a knot. Finally, the needle pulls the upper thread back up, tightening the knot against the fabric.
The stitch is done and the cycle can start again. Now let's have a look at how the fabric moves in-between stitches.
In the case of sewing machines, the upper shaft transmits movement to two components: A crank [5] that raises and lowers the vertical axis connected to the needle [6]. A second belt [7] connected to a second drive shaft [8]. These two parts are parallel to the first and mimic them, which enables the mechanism in the bottom of the sewing machine to be perfectly synchronised with the top.
And there you have it. 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: Header image source:. Please enter a valid comment.
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