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A small guide for choosing a 3D printer for beginners / Sudo Null IT News for a few questions. I will try to answer from the point of view of my seven years of experience as a 3D modeler and 3D printer. First, a few caveats.

This article will not contain advice: “Buy a printer from manufacturer X - it is good, but do not take manufacturer Y in any case”, only general recommendations.

Informal classification of printers, adopted in the domestic segment of printers.

Everything written is based on the personal experience of the author and is his personal opinion.

If these warnings do not scare you - welcome under cat.

First, let me introduce myself: my name is Maxim and I bought the first printer back in 2013. It was a Chinese clone of Makerbot 2 with the hilarious name "Migce Cuble".

There was almost no information on 3D printing on RuNet, only one topic on the “Roboforum” and several scattered articles about what a cool thing it is - 3D printing, so to master it I had to google a lot in English, come up with their crutches and delve deeply into the physics and technology of the printer. We must pay tribute, in the English-speaking segment, then there was an active development of this technology and interesting articles such as “Selection of the type of notches of the extruder feed gear for a specific type of plastic” or “Determination of the optimal printing temperature using a strain gauge installed on the extruder” came across. Since then, 7 years have passed. I managed to master modeling, assemble a printer from scratch, be a moderator of “3D Today” for a while, work as a freelancer in the field of modeling and printing, organize a prototyping circle for children and bring it to the Russian level. Recent achievements: volunteered as a coordinator for the supply of plastic in the project “ Anti-covid makers ”. A lot has changed during this time, including printers in my home zoo. One thing has remained unchanged - the question: "What should I buy as my first printer?".

Currently, two types of printers are mainly used at home: printing using FDM (FFF) technology - layer-by-layer plastic fusion, fed in the form of a rod and SLA (LCD) - printing with a photocuring polymer. FDM technology is more common, due to the lower cost of equipment and consumables, but in recent years, the prices of LCD printers and printing resins have decreased significantly and photopolymer printing has almost caught up with FDM printing in terms of cost and entry level.

To be honest, I almost never did SLA printing and I still don’t have an LCD printer in my home zoo (but it may appear soon), so I will mainly talk about FDM printers. They can be divided into 3 main categories according to the type of mechanics:

Dried tables - printers with a table that moves horizontally. Perhaps the most common printer model. It is distinguished by low cost of components, ease of assembly and adjustment, for which it is loved by the Chinese and printers. The disadvantages include the difficulty of creating a closed body and printing thin, tall parts that begin to wobble as the height increases, especially if the part is printed from flexible plastic such as TPU.

Cubes - printers in which the table travels vertically. The cost of such printers is higher, as are the requirements for straightness of hands during assembly and setup. But a properly designed die delivers faster print speeds while maintaining print quality. At the same time, the design of the printer is very easy to make closed, which allows printing with engineering plastics such as ABS and Nylon. This type of design is often used in semi-industrial and industrial grade printers. Some manufacturers manage to shove the drygost into the body of the cube, but this does not bring any special advantages for printers.

Delta - printers with the so-called delta kinematics, when the print head is attached to carriages moving along vertical guides using a system of rods. The cost of the mechanics of such printers is comparable to the cost of dry-tables. Can print at very high speeds. But they are very demanding on the correctness of keeping the dimensions, the straightness of the hands during assembly and adjustment, and the speed of the “brains” due to the complex mathematical calculations of the trajectory of the head movement.

Strongly not recommended as a first printer, although the widespread use of the table level sensor somewhat reduces the requirements for straight hands during setup and operation.

By availability on the market, 3 main categories can also be distinguished:

Chinese (cheap Chinese printers) are almost always designers, even if they come assembled.

• The advantages include low cost, wide distribution and uniformity, which allows you to buy failed parts in the nearest radio shop or on well-known Chinese sites. Popular models gather around a relatively large number of users who actively share their experience in the field of self-repair and improvement of this type of printer. The most popular models will most likely be printed right out of the box, but will require improvements during more or less long-term operation.

• The downsides include the quality of the components/assembly and the need to refine these printers to obtain acceptable print quality/speed. It is recommended to take models that have already formed a large community around them. This means that most of the shortcomings have already been identified and there are standard inexpensive methods to solve them.

Kits (assembly kits, mainly domestic production) - google for the words “ ZAV ”, “ UlTi ”, “ UlTi ”, etc. Usually they are a set for assembling a plywood cube. Recently, options with metal cases have appeared. Supplied in different versions - from a kit for building a case with printed parts, ending with completely finished assembled products.

• The advantages include a fairly good engineering study, the ability to choose the components for the mechanical and electronic parts and make the printer completely to your requirements. With good components, they provide fast, stable and high-quality printing. The price is somewhat more expensive than Chinese printers, but cheaper than semi-professional printers of domestic or European / American manufacturers.

• The disadvantages include a decent amount of time spent on assembly and waiting for components if you decide to save money and order these components yourself from different sellers and assemble a printer from them. When assembling, direct hands are required.

factory printers (domestic or US/European semi-professional printers). There are a lot of models, the designs are very different.

• The advantage of this class of printers is printing with acceptable quality out of the box. In addition, you get operational reliability and warranty support from the manufacturer.

• The main disadvantage is the price. It is often not clear what factors it depends on. You can buy a high-quality printer relatively inexpensively, or you can take something incomprehensible for a high price. The second disadvantage is the presence of specific solutions that are incompatible with popular solutions on the market: these can be nozzles with their own thread pitch, special fans, electronics, belts, and even slicers. Some are demanding on the quality of plastic, there are models that work only on chipped coils.

Now that we have decided on the classification of printers, we can proceed to the procedure for choosing a printer for ourselves, our beloved. If you are on fire with the purchase of a 3D printer, first decide what you are going to take it for, the type and configuration of the printer depends on it. Let's analyze a few typical situations:

I want to do something for myself and my family - if you don't plan to print products from engineering plastics that can withstand decent loads and temperatures - a Chinese drygostol or a cube will suffice. If you have a budget and want to figure out how the printer works before starting, and not during printing, you can look in the direction of domestic assembly kits - with them you can get the best quality and painlessly switch to engineering plastics.

I can't do anything with my hands, but I have to. Therefore, I want a printer that will do everything for me - in this case it is better to look at semi-professional printers. If the budget is not enough, you can look at used ones or order an assembly of a domestic set - usually manufacturers offer this service through intermediaries. When ordering an assembly - look for experience and positive reviews, there are nuances.

I want to print for sale - a farm of the same type of printers, depending on the budget. If there is no budget, but there are resources for regular tuning / repair - you can even from Chinese drygosts. Additionally - a printer with a large print area, a printer with a closed case and a heated table for printing engineering plastics, an SLA / LCD printer for printing products with a high degree of detail.

Whether at work or at home, the need arises to design and print enclosures and parts. If only small prototypes are planned - an LCD printer, if functional products - a closed cube with the ability to print with engineering plastics.

Kids are growing up and this is the technology of the future, I want you to master - see what printers are used in prototyping competitions in your area. Take the same one. May be used.

I want to make figurines for desktops, beautiful little things for home - LCD printer.

I want to figure out what kind of technology and how it works in general - a kit for assembling a domestic manufacturer. By the time you collect it, you will understand.

There is no money at all, but I want to print, I will collect it myself from scratch - it will turn out better and cheaper than the Chinese. Strange as it may seem, no. The cost of components with Ali will be more expensive than a printer with Ali. Of course, if there is a machine park, the ability to use it, a set of iron, shafts and electronics lying around in the corner of the workshop, it can burn out. There are options for building printers from boards and furniture rails, but their print quality is, to put it mildly, lame. For example, the construction of the printer shown below cost its author 80-9, according to him.0 dollars.

If you want to completely build your printer from scratch, then it's better to treat this as a separate hobby and accept that it will not turn out very cheap. Well, or look in the direction of used printers.

I don’t know why I need a printer, but I want to try - a Chinese or a domestic assembly kit. Can be used. If it doesn't work, you can always resell.

Decided on the type of printer - what to look for first of all when buying ?

• Firstly, on the rigidity of the structure - the accuracy and speed of printing depend on it. It is in the direction of strengthening the rigidity that your first modifications of the Chinese printer will be directed, since the material “steel plasticine 3 (c)” is considered an unaffordable luxury for the Chinese. In the case of the purchase of domestic kits, the situation is slightly better.

• Secondly - if the printer will be in the apartment - "silent" drivers for stepper motors. 3D printing is not a fast process, and having a constant loud enough buzzer under your ear is annoying.

• Third - the presence of a heated table and the ease of modification to a closed case. Over time, the desire (need) to print ABS will come, and it is problematic to do this on an open drygost.

• Fourthly, the presence of a good plastic blowing system is also important.

• Fifthly, when choosing printers with CoreXY, H-Bot or Delta mechanics, it is highly desirable to have a 32-bit control board, or you will encounter fading (freezes) at high print speeds.

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