New technologies are emerging today like mushrooms after rain. 3D printing allows you to create not trivial text on paper, but three-dimensional objects, the parameters of which are set by the person himself.
This opens up endless horizons, but the most interesting thing is that these devices are already available for individual use. The technology is so interesting and promising that more and more people learn about it, some of them even buy such printers at home.
Only now, the owners are faced with numerous myths that surround this technology. And although the desired future has not yet arrived, it is undoubtedly already near.
A 3D printer can print anything. In fact, everything is not as rosy as we would like. At a certain skill level, you can indeed print a lot, but there are also limitations. So, for example, printing is limited by its permission. You cannot create parts smaller than the nozzle size. It should be borne in mind that if the previous layer does not have time to cool down, and a new one is already being laid on top of it, then the geometry of the created object will suffer. This problem can be solved by forced cooling of the previous layer with a stream of air. Another limitation is the geometry of the object and its dimensions. The model may well have overhanging elements, which will entail the need to print also supporting structures. But if this support is printed with the same material as the base model, then it will not be easy to remove it later. As a result, the already imperfect surface will be damaged. It is worth demanding a flat base from the model, otherwise it will come off the surface of the desktop. If the base is small or non-flat, then a special substrate, raft, will be required for printing. Removing it will further spoil the surface. The maximum size of the printable area should also be taken into account. If the model exceeds it in size, then it simply cannot be printed at one time. There is only one way out - cutting the model and printing it in pieces, followed by gluing the finished parts.
You can print already assembled mechanisms. If we talk about simple mechanisms, such as a nut screwed onto a bolt, then it is really possible to create them. But this does not apply to FDM technology, which is used in most of the available devices. It will not be able to provide the required accuracy, as a result, the bolt and nut will fuse together. It will be much easier to create a separate bolt and separately a nut. True, there have been created models of a car with spinning wheels and a whistle with a ball inside. It, however, has to be broken off first from the inner surface.
3D printers allow you to print in full color. You should forget about seeing full color 3D printing at home. In order to print in two or more colors, you need to use either several print heads or change the bar during printing, or paint it. Experiments were carried out on mixing colors, but they also did not make it possible to carry out an abrupt color transition.
The printed part will be fragile. It makes sense that a 3D printed part won't be as strong as a cast one. The strength of the created element depends on where the force was applied - whether along the layers or across them. In general, the approach is similar to wood, whose strength also depends on whether force is applied across or along the grain. Affects the strength and fill percentage of the part. If a cube with a 2 centimeter edge and 100% filling is printed, it will be quite difficult to break it with a hammer. Don't forget about the printed pistol.
Printed models do not need any further processing. In fact, it turns out that the surface of the 3D printed model is not at all perfect. There are sagging, ribbing, and burrs. It is possible to smooth them out using mechanical treatment (burrs are cut off, sanding is carried out), as well as chemical treatment, it means a bath with a solvent.
3D printing is a waste-free technology. The difference from milling really lies in the receipt of much less waste. Indeed, in this case, the object is obtained not by removing the excess from a single piece of source material, but by building up layers. Nevertheless, you still cannot do without waste. The fact is that during downtime, plastic tends to flow out of the nozzle. Yes, and at the very beginning of the activity of an amateur 3D printing, the percentage of defects will still be high. And with the end of the spool of plastic, there will be a piece that is simply not enough to print something useful. This is also a departure. And from the printed model, supports, substrates and skirts are then cut off, which also applies to production costs.
3D printers are too expensive (or too cheap). This myth has two extremes. Some people consider the device expensive, while others, on the contrary, find it cheap. You can assemble the printer yourself, keeping within the budget of $ 500-800. However, does everyone have time to implement such an option? In addition, it is worth remembering that some of the parts will have to be ordered from abroad, we simply cannot find them. The high cost of such devices is explained by manual assembly. But gradually the price of 3D printers is dropping and will continue to do so. Yes, and the concepts of "expensive" - "cheap" are relative, for someone even 1000-1500 dollars for an unusual and revolutionary device is a mere trifle.
D-printing is easy. You just need to plug in the printer and start working. This is perhaps the biggest misconception about 3D printing. Whether the printer is worth $ 700 or $ 5,000, you will have to suffer with its setup. After calibration, you will also need to select the slicer settings. So good printing takes experience. Usually users say that it will take about half a year, along with constant improvements to their device.
3D printing will help you make money. The technology seems so promising that its business prospects seem obvious. In fact, you should not count on huge profits, since there is simply no big demand for such products. There is no way, and no sense, to compete with large-circulation products. It is cheaper and easier to buy the required item in the store than to print it. And printing is suitable for personalized objects, small-scale production, when the edition will cost less than the form for its production, prototyping. This is what 3D printing was originally used for. And the surface quality, as already mentioned, leaves much to be desired. So every detail will also require additional post-processing in order to acquire the desired presentation.
3D printing devices will soon be in every home. It seems that as usual printers have entered our lives, so will 3D printers for everyone. In fact, you need to create a model before printing. The user is faced with the question - to print ready-made models or to start modeling on his own? But how many of us have 3D modeling skills? And the printing of other people's models will soon get bored, and the necessary models will simply not be found. We'll have to order a three-dimensional model to print it later. So, does it make sense to buy yourself a tool and make an item if you can already buy it at the nearest store? And 3D printing has a lot of problems that an ordinary user simply cannot fix. So it is worth taking a closer look at the development of an interesting technology, but not counting on its massiveness in the near future.