Machine Stitching 3. Wind the Lower Thread and String the Upper thread

Now, I will explain how to wind the lower thread and how to string the upper thread of machine.
I recommend you to do this since there is a limit to explain with a photo.

You need to wind the lower thread in the bobbin.

The bobbin in the photo is the genuine bobbin of the JUKI.
If the lower thread is not wound tightly, the thread can be tangled. If this happens, the knot with the upper thread is not well formed and the stitches under the thread may be skipped or the lower thread may get stuck on the bobbin, making machine stop. In the worst case, the bottom rotation part can be warped. This is the worst situation, so you need to be careful.
You will feel being shot when the lower thread is tangled and only a needle hole is left. In my experience, using genuine bobbins seems to have less of these problems.
Then, let’s take a look at how to wind the lower thread step by step.

First, there is a separate device to wind the lower thread to the right side of the machine. Put the bobbin here. But the wind position and device are different by the manufacturer. There is a device that winds several lower threads together at one time for use in mass production factory. This is to use a large amount of wound thread at a time in advance since there is a hassle of stopping work and removing the bobbin to wind the lower thread again.
In fact, it is often annoying to use a machine by winding the lower thread. It stops the work flow. That’s why people prefer a relatively large bobbin.
In Korea, the rotating part of the lower thread(rotary) is called a Gama, and the larger one is called a king Gama and the smaller one is called small Gama. The Gama is a rotary part in sewing machine.

Insert the thread into this hole.

Then pull it all the way and wind it around the bobbin 3–4 times.

Then pick the thread out between the bobbin holes and pull it firmly.
Lastly, push the silver lever at the center of the photo forward to fit it in the bobbin.
Now, when you press the machine pedal, the thread is winding.

When you wind the thread, you need to check that the thread can come out smoothly.

At this time, the presser foot should be raised.
And the upper thread should not be stringed on the needle.
If the thread is wound on the bobbin, it stops automatically.
Now, let’s string the upper thread.

Check if the winding is not tangled.

First, string the thread on the wind.

Then, string to the machine by cross like the photo.

And string the rest like the photo.
The tension of the thread will be correct if you string all the thread like the photo.
There is a limitation to explain with the photo. You can recognize it right away if you actually see it.

Then, string the thread into the hole of needle bar.

Lastly, you can string it on the needle.
The direction of string through the needle should penetrate from left to right.
If you look closely, the groove of the needle is also recessed to the right.
If you string the thread in opposite direction or opposite needle, stitching will not work properly.
Here,
In general, hand stitching and machine stitching are distinguished by their opposite direction of diagonal line.
But, in case of post arm machine, there is also the opposite direction of diagonal line from the normal machine, so they have the same direction as the hand.
It is because the rotary position of the post arm matching is different from other cylinders or flat plate machine.
Again,
There is a machine with the same structure as a rotary of post arm machine even if they are cylinder.
In conclusion,
It is not exactly correct to distinguish the hand and matching with diagonal direction.
It is complex.

Now, turn the upper thread and snatch the lower thread.

When the thread is like photo, it is ready for the matching stitching.
Before matching stitching, pull the two threads enough to make sure that the threads are pulled out naturally.
The most important thing is that the thread should not be caught for any reason and should be released smoothly. Otherwise, the stitching doesn’t work properly. In this case, you need to stop the work and do stitching again after solving the problems.
We need the courage to stop as we have one to start.
