Chapter 505: CNC Coding Loom (Please vote and subscribe)
Although this new loom is called CNC coding, it is actually completely different from computer numerical control. After all, it is a technology from thousands of years ago. Where did the computers come from at that time? Even if it is coded, it is all manually coded, which feels similar to programming.
The loom is still the same loom, the only difference is the coding. The whole working principle is actually very similar to the popular cross-stitch in modern times.
Cross-stitch is to draw the cloth into grids, and then fill it with cross-stitch threads of different colors, and finally use this dense mosaic effect to form a pattern. This loom is similar.
The loom does not have the grid of cross-stitch, but the cloth itself is composed of countless warps and countless wefts. These warps and wefts intersect horizontally and vertically, and can actually be regarded as small grids.
The process of weaving is to control the two groups of lifting rods A and B, open and close the two groups of warps in turn, and then let the wefts shuttle through them, gradually forming a dense cloth.
But if you want to weave a pattern directly, you can't control the warp into two groups. Suppose you want to weave a yellow pattern on a black base cloth, you have to pick up the corresponding warp threads at the appropriate position, and then insert the yellow weft threads so that the weft threads can be concentrated in that position and exposed, just like filling the same color in the same horizontal row of grids in the required position on a cross stitch. The same
is true for this loom. The
first difference from the original is that the lifting rod that controls the opening and closing of the two groups of warp threads must be modified. Although it is still divided into two groups A and B after the modification, it is necessary to allow each warp thread to have the ability to adjust independently. This is a very delicate job.
The specific method is to install a row of thin iron wires on the lifting rod with the same number as the warp threads, each iron wire corresponds to a warp thread, and then pass the warp threads below, and leave a row of neat top rods above.
The mechanism that controls the CNC coding is like a roll of oversized bamboo slips, which is made up of long bamboo pieces. Each bamboo piece here can be regarded as a row of grids on the cross stitch, and each grid corresponds to a warp thread. Then, in the same row, a hole is punched on the grid that needs to be filled with the same pattern, and finally installed on the top of the lifting rod.
In this way, every time the lifting rod lifts the warp thread, the iron wire on the warp thread will press against the bamboo piece. Among the coded warp threads that need to be lifted, the part on the top just corresponds to the small hole on the bamboo piece, so that the warp thread can be successfully lifted. There is no hole on the corresponding bamboo piece on the warp thread that does not need to be lifted, so when lifting the warp thread, the bamboo piece will press the top of the iron wire, so that the warp thread cannot be lifted.
After that, each time the vertical lifting is performed, a bamboo piece with a different hole position is replaced, and then the bamboo pieces are sorted according to the required lifting sequence, and finally a cyclic program is formed.
During the whole process, the holes in different positions on the bamboo pieces are actually numerically controlled. By digitizing each warp thread, and then controlling the warp threads below to rise and fall in the designed order through two operating modes: blocking and allowing rise. This is simply the earliest binary programming.
The next step is to sort each bamboo piece, which is actually coding, that is, to arrange each set of data in order so that the machine can operate continuously in this order.
The entire bamboo slip is strung together into a track, fixed by two rollers and gears, and spread flat above the loom, so that the row of iron wires on the lifting rod can be fully combined with the bamboo slips.
As for the linkage mechanism, the pedal of the lifting device is connected to the gear part of the coded bamboo slip above through several crankshafts and connecting rods on both sides of the machine. In this way, every time the weaving woman steps on the pedal of the lifting device, the coded bamboo slip above will also be driven by the connecting rod and gear to switch to the next bamboo piece, and then repeat a set of codes over and over again like a pulley.
The most primitive CNC programming technology in the world is actually not very difficult. It is made of iron wire, woodworking, and bamboo drilling. The difficulty lies in culture, that is, the design of the pattern. After all, even if you can weave a pattern directly, it is impossible to keep it unchanged forever. Of course, the richer the pattern, the better, so that it will not be monotonous.
The whole machine was not remade, but directly modified from an old shuttle loom. The overall appearance is larger than the original one. After all, a linkage mechanism has been added on the outside, a CNC encoding device has been added on top, and two sets of lifting devices have been modified inside.
However, even so, it is considered very small, because the loom that Luo Chong had seen in the documentary was as high as a two-story building, with workers on both the upper and lower floors, and a loom required four or five people to operate at the same time.
The one that Luo Chong led people to modify can also be placed in a bungalow. It occupies a relatively small area and space, and it integrates advanced shuttle technology. It is also better than the original in terms of workers and efficiency.
In principle, this machine only needs one person to operate, of course, this is only when weaving. For example, when changing the shuttle or changing the code, you still need someone to assist. Generally, each machine is equipped with a weaver and an apprentice assistant, two people are enough.
As for the efficacy, because silk is much thinner than hemp and wool, and it is more troublesome to encode, the loom that could originally weave ten meters of woolen cloth a day, now one person can only weave about two meters in a normal day, and the efficacy has dropped five times.
As the saying goes, slow work makes fine work, Luo Chong did not force it in this regard. If it was so easy to weave, it would not be a luxury. In terms of technology, whether it is the complexity and sophistication of the machinery or the efficacy, it is already the highest level that can be achieved at present.
It took half a month to transform the first CNC loom, and Luo Chong has also made the first batch of bamboo chip codes, which are a set of codes with glass dragon patterns, another one with auspicious cloud patterns, and the last set is the code of a Chinese flag. With this set of codes and the corresponding two-color silk thread, you can directly weave a Chinese flag, and they are all connected together. At that time, you just need to cut it into pieces from the middle.
Half a month passed, and it was time for the first rice harvest of the year. In the golden rice fields, the tribesmen were working with greater enthusiasm than in previous years, because, after paying the corresponding grain tax, they could store the rest of the harvested grain themselves. They finally had grain in their own fields.
(End of this chapter)
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