None of the paragraphs and not a single word of this text is written in vain, everything is important to achieve the PERFECT result, since we are going to sew not just fabric, but fabric that conducts electricity:
— the joints should be tight and made using the simple technology of the linen seam (see the pictures at the end of the page), BUT do this actually twice, for which:
imagine that you need to connect 2 wires in the wiring, what do you do?
a) if you do not remove the insulation from the wire, contact will not be possible even if you tightly tie them together, right?
this is the first mistake made when flashing seams, guess what they are doing? add OTHER FABRIC (which the bag is sheathed) between the layers of the SCREEN fabric in the seam ... it doesn’t work that way ...
At first, the bag is made only of SCREENING fabric, and only AFTER this you can start lining the external protective (from wear) with any fabric you like.
b) if you remove the insulation, you have two metal ends and you just put them together and wrap the electrical tape on the outside, what will you get? there are a lot of sparks in a very small plane of contact between two round wires ... that is, the contact area will not be enough for full energy transfer. Therefore, the wires are twisted tightly tightly spiral !!!
Also with the usual seam on the fabric, if you just put one piece of fabric and just make one line, this will not be enough for a real result !!!
That is why I am writing all this text about this DOUBLE LINEN STITCH. look carefully at the pictures where the seams are visible and now you will see a lot again.
c) If you take a few pieces of metal wire and try to make an extension cord out of them? even with perfect twisting of the wires at the points of contact, the total conductivity in different cases will be very very different and dangerous, up to overheating and fire.
— sew the entire volume from one piece, if possible, this allows you to maintain maximum and uniform conductivity of energy over the entire area of the bag.
«How to calculate the amount of fabric I need?»
— if you have a bag, measure three parameters, width height thickness (x y z). we draw a typical box on paper and look at it with the understanding that the width of the fabric roll is a maximum of 55 cm, from this we need to subtract the cost of the seams and the places where the bag will be fixed to the bag.
I will give 2 examples in the photo (see picture):
- the first about the case when it is better to use the method of two seams on the sides;
- the second when ONE bag length + ONE thickness (sidewall) is more than 50cm.
I do this every time you send me a bag or order a finished bag, or I form an application for my seamstress.
+ a simple method to turn the calculation of a bulk package into a flat one, draw a small square and write:
for width: bag width + 1 side;
for height: bag height + half the bottom thickness + distance from the top edge to the zipper or the bent edge of the bag.
«How many layers of fabric are needed for a reliable result?»
- every time I try to convey to the world information that the principles of signal shielding do not work like "everything that does not work inside is because it is inside."
If you imagine a typical iron bucket and a round RF sensor, then there is a certain chance that even if the sensor is inside the bucket, the gate will receive a response from it.
In what case will it be ... ???
If the sensor is located in the center of the bucket far from the walls and at the same time it will be in a position parallel to the plane of the goal frames !!!
open the video on the differences of the AM RF gates at 52:52, I show exactly this moment there as clearly as possible:
But we don’t go with buckets, but some use huge huge bags ...
As a result of many experiments with our gates, when tuning to maximum power, it turned out that:
- one layer is insufficient with a bag thickness of 10 cm or more when the sensor is in a superposition in the center of the bag at a distance from the walls of the bag.
But, this is the most powerful gate, 1 layer and a superposition of the sensor when carrying a bag 20 cm from the frame.
that is, a chance to get a breakdown with 1 layer if you do not have a huge suitcase and you go without clinging to the gate ... near zero. congratulations you are a reasonable user !!
For users with suitcases:
take out fur coats, outerwear or clothes in piles at once? Do not rely on your safety, make 2 layers, this will save you from problems even with the most powerful gates, you can wipe them as you like. Do not believe? Think I need to sell you more fabric? I just don’t need then questions in the style of “what happened?”
"G-greed" will be my answer, and "P-physics cannot be deceived."
If you change your mind about making packages, bags, etc. yourself, study the information «about the structure of interaction with me when placing an order»:
usually they want to make something specific out of fabric ... a bag, a lining of a backpack bag, a ready-made bag of pure fabric, pockets.
most of the options for finished and EARLY dispatched orders are in the VK album on one of my pages:
I keep the bags on hand very rarely and simply because when I was shopping I liked some practical, comfortable bag.
Then she gets to my warehouse and is changed.
Therefore, usually everything is done UNDER THE ORDER of my seamstress who has already crossed heaps of bags, found heaps of pockets, etc.
The price of her work:
for a simple bag covered on all sides with a regular cloth to eliminate possible wear so that your bag lasts forever: 10-15 us$. depending on complexity
the price of changing the bag from the store: 15-25 us$. depending on complexity
the cost of altering a complex backpack: 25-35 us$. depending on complexity
This is very little money for a unique job that even your “familiar super-seamstress will do no worse” .. I definitely know which is worse, with large nerves, much longer and more expensive. Do not save when there are professionals.
Therefore, either you buy fabric, or you clearly state it, I want this and this, these are the exact sizes of my bag and its photo. It is my requirement to process your order with maximum speed, accuracy, etc.
I calculate the exact required tissue consumption as accurately as possible and it turns out that you buy no more no less than what is really required.
This is my service !!!