Updated at: 31-08-2022 - By: Sienna Lewis

There was an expectation that the application of technology in the development of the sewing machine would facilitate a more rapid, productive, and less labor-intensive process. Understanding how sewing machines function will help you maintain your sewing routine.

Tell me about using a sewing machine. work? There are two different settings for the sewing machine. To begin knitting, simply connect the machine to an electrical outlet, select a stitch pattern, and turn the machine on. The needle can also be moved on an automatic sewing machine by treadle or handwheel. No matter what you choose, you’ll have a lot more fun with your stitching.

How Does A Sewing Machine Work: Stitches

Stitches in Hand Sewing

It is possible to sew garments by hand. We only use a single thread during the whole operation. Included are both the front and reverse of the fabric. As the thread passes through the needle, it is pulled through the fabric and through to the back. The identical action is repeated, this time from the back to the front.

When viewed from a distance, it appears as though the needle is constantly hopping from one side of the fabric to the other. This is referred to as the “Runny Stitch” among knitters.

Stitches in Machine Sewing

In machine stitching, each needle uses two threads. You can use either the top or the bottom of the fabric.

Basic Parts of Sewing Machine


All of the machine is pulled along by the pulley system. The crankshaft will reveal the inner workings. Power comes from an electric motor, although it can also be controlled by hand by pulling a handle. The pulley can also be operated by pedaling your feet.

Upper Crankshaft

One crankshaft is connected to the other via a pulley at the top. The opposite end is where the shaft is connected. A vertical shaft joins it to the one down below.

A rotary crankshaft connected to the upper crankshaft converts the motion of the pulleys into motion of the needle. Consequently, the lower crankshaft drives the Shuttle case and Dog Food.

Bottom Crankshaft

As one end connects to the crankshaft through an inclination shaft, the other can be used to adjust the angle of the drivetrain. The second is related to both canine nourishment and space travel. The dog feeder and the shuttle are both driven by the lower crankshaft.


What we have here is essentially just a bobbin with thread wound onto it. Additionally, hooks and a casing are supplied, with the latter connecting to the lower portion of the shaft. You can locate it, along with the needle, under the dog food.

Dog Feed

Connecting the shuttle’s casing to the shaft is done at its base. This allows for uniform movement of the fabric. This method guarantees uniformity in stitch size and distance between adjacent stitches.

In addition to these essential parts, a number of other factors ensure the machine runs smoothly and efficiently. Some examples of these include a thread tension tool and a needle movement speed attachment for creating a certain stitch size.

Motions of Sewing Machine

What we found is that all of these parts depend on one another. Following this, we will investigate the numerous motions that these components do.

Up Down Movement of Needle

The rotational motion produced by the pulley is transformed into vertical and horizontal motion by the crank on the higher shaft.

Shuttle Motion

The shuttle’s propulsion is enhanced by the shaft located in the ship’s hull. There is a partial circle formed.

Dog Feed Motion

It’s all about switching gears and going back and forth. This force drives fabric forward.

Why Does A Sewing Machine Have Two Threads?

Since the needle’s duty is to penetrate the fabric, let one thread flow through, and then make a knot with the other, the sewing machine requires two threads. A sewing machine generates stitches in this way rather than by manually sewing and pressing the needle through the fabric. The bottom thread is withdrawn from a bobbin located within the revolving housing and is then hooked onto the shuttle.

How does a sewing machine make stitches using two threads

  1. The thread is fed into the needle from above the fabric, through the fabric, and into the needle.
  2. The shuttle is set in motion with the intention of capturing the thread from the needle.
  3. The shuttle’s hook is used to thread through the loop left by the needle at the thread’s surface.
  4. Thread from the bobbin is caught by the shuttle hook and pulled along by the shuttle.
  5. Sliding the needle up the thread while removing it from the hook will tighten the top thread.

How do Sewing Machine Bobbins Work

You need to know what a bobbin is before you can understand how it functions. To thread the underside of a sewing needle, a bobbin is used. You can modify the color of the thread in your bobbin to achieve a specific effect or to conceal the thread entirely; it doesn’t have to match the color of the thread in your spool.

The bobbin, for example, can be made from a wide range of materials. Stainless steel, other metals, or polymers can all be used in its construction. It’s just a standard unit of measurement. In order to understand a bobbin’s function, it’s important to first understand what a bobbin is. Bobbins are used to store the underthread that is used for stitching. Your bobbin thread might be the same color as the thread on your spool, or you can use a contrasting color to create an effect or to conceal the thread.

Depending on the make and age of your machine, the diameter could range from a quarter inch to a half inch. The thread is already coiled onto the spool of the pre-loaded bobbins.

A bobbin winder cannot be used until some thread has been wound onto the bobbin. The bobbin is positioned atop the winder, with the thread passage blocked by the stopper.

To start sewing, you should wind the thread around the bobbin many times. Then you can sew whenever and wherever you like. Thread should be removed by placing the bobbin in an under-bobbin holder and taking it out a few inches at a time. After that, you’ll have no trouble sewing at all.

The Inner Works of a Sewing Machine

Many of the modern sewing machines’ essential workings are hidden beneath the cover. To see all the moving parts, pulleys, belts, and cranks, you have to take the lid off.

Each of these parts is powered by its own electric motor and belt. The upper is rotated by a shaft, which in turn moves the upper via a wheel that is driven by a drive belt. Several mechanical parts of the higher drive spin as a result. The lid of a contemporary sewing machine conceals many features and functions. It turns out that behind the scenes is an elaborate system of pulleys, gears, and chains.

The crank is a pivotal moving component. Use this machine to get your stitching done as rapidly as possible. A belt connecting the two driveshafts rotates all of the mechanical parts attached to it.

Since the shuttle and needle share a common drive shaft, they can travel in tandem.

What Is The Purpose Of Bobbin?

At its most fundamental level, it fulfills the same purpose as the cylinders traditionally used to hold yarn in place throughout the weaving process. Some people mistakenly believe that bobbin thread and basting thread are the same thing, but that’s not the case. The bobbin of the machine consists of the following parts:

Bobbin case

Using a bobbin case facilitates the process of unraveling the thread.

Bobbin tension system

There is also a tensioning system on the bobbin that may be adjusted.

Bobbin winding system

Making sure thread is easily transferred to the bobbin is the job of the Bobbin Finding System.

Can A Sewing Machine Work Without A Bobbin?

Using a sewing machine requires both the needle and the bobbin. However, there are exceptions, such as machines that can only use needle thread. To sew lock stitches without a bobbin would be difficult.

How do you sew without a Bobbin?

Using something other than a bobbin allows you to sew without a sewing machine. One can think of overlockers, sergers, and chain sewing machines as examples. Without the Bobbin, using an embroidery machine might be challenging.


The sewing machine is, in essence, a machine designed to sew. A few minor variations may exist between the various models now on the market.

Hopefully, you now have a firmer grasp of the inner workings of sewing machines and are better prepared to stitch your own unique designs on a wide range of beautiful fabrics.