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Everything you need to know about 3D printing

The 3D printing In just a few years, it has gone from being a technology reserved for large companies and research centers to becoming an accessible tool for millions of people around the world.

Currently we can find 3D printers in homes, schools, universities, workshops, hospitals, laboratories and even in large industries capable of manufacturing thousands of parts each year through processes of additive manufacturing.

Its evolution has been spectacular.

Modern machines are faster, more accurate, easier to use and much cheaper than the first generations of 3D printers.

Thanks to this, anyone can start creating custom parts, prototypes, tools, decorative figures or even products to sell online without having to make a large initial investment.

But despite its enormous popularity, many people still wonder:

• What exactly is 3D printing?
• How does a 3D printer work?
• What materials are used?
• Which 3D printer should I buy?
• What differences exist between filament and resin printers?
• What software do I need to 3D print?

If you've made it this far, you're in the right place.

In this comprehensive guide you will learn absolutely everything you need to understand how 3D printing works, learn about its real applications, discover the different types of printers, and understand which technology best suits your needs.

In addition, you will find links to our specialized guides on:

👉 Everything you need to know about 3D printing

👉 Materials for 3D printing

👉 PLA vs ABS vs PETG

👉 Software for 3D printing

👉 How to calibrate a 3D printer

👉 3D printers for beginners

👉 Filament 3D printers

👉 Resin 3D printers

👉 Best professional 3D printers

👉 Best sites to download STL

Whether you're thinking about buying your first printer or want to delve deeper into this exciting sector, this guide will help you understand why the 3D printing It has become one of the most revolutionary technologies of the 21st century.

What is 3D printing?

The 3D printing, also known as additive manufacturingIt is a manufacturing process that allows the creation of three-dimensional physical objects from a digital model.

Unlike traditional manufacturing methods, where material is typically removed to obtain a final piece, 3D printing builds the object layer by layer until the desired shape is completed.

For this reason it is called additive manufacturing.

The process always begins with a digital design created using 3D modeling programs or downloaded from specialized STL file platforms.

Subsequently, this model is processed using software called slicer, responsible for converting the design into instructions that the printer can interpret.

Finally, the printer deposits or solidifies the material layer by layer until the complete piece is built.

Depending on the technology used, materials can vary considerably:

• Thermoplastic filaments.
• Photosensitive resins.
• Industrial powders.
• Metals.
• Composite materials.

Currently, 3D printing is used in sectors as diverse as:

• Medicine.
• Aeronautics.
• Automotive.
• Architecture.
• Education.
• Engineering.
• Jewelry.
• Industrial design.
• Manufacturing of customized products.

Its ability to manufacture complex parts quickly and relatively cheaply has completely revolutionized numerous professional sectors and continues to expand its possibilities year after year.

How does a 3D printer work?

Although there are different technologies within the world of 3D printingThey all share a fundamental principle:

Create physical objects layer by layer from a digital model.

To better understand the process, we can divide it into several phases.

1. Design or download of the 3D model

It all starts with a digital file.

This model can be created using 3D design programs such as:

• Fusion 360.
• Blender.
• SolidWorks.
• Tinkercad.
• FreeCAD.

However, designing from scratch is not mandatory.

Currently there are thousands of platforms where you can download ready-made models in STL format, as we will see later in our guide on best pages for downloading STL files.

2. Preparation using Slicer software

Once the model is obtained, we must process it using a program called slicer.

The slicer analyzes the piece and divides it into hundreds or thousands of horizontal layers.

It also generates the so-called:

G Code (G-Code)

which contains all the necessary instructions so that the printer can manufacture the object correctly.

Some of the most used slicers currently are:

• Priest.
• OrcaSlicer.
• Bambu Studio.
• PrusaSlicer.
• Lychee Slicer.
• Chitubox.

Later we will delve deeper into our specific guide on software for 3D printing.

3. Layer-by-layer manufacturing

Once the print file is generated, the machine begins to build the part.

Depending on the technology used, the process changes slightly.

For example:

FDM Printers

They melt a plastic filament and deposit it layer by layer.

SLA or MSLA printers

They solidify liquid resin using ultraviolet light.

SLS Printers

They fuse powder using lasers.

In all cases, the objective is exactly the same:

Build the three-dimensional object layer by layer until the final geometry is completed.

4. Postprocessed

After printing is complete, some technologies require additional processes.

For example:

FDM Printing

You usually only need to remove supports if they exist.

Resin printing

Requires:

• Washing.
• UV curing.
• Removal of supports.

For this reason, FDM printers are usually more convenient for beginner users.

Main components of a 3D printer

Although there are multiple configurations, most modern printers incorporate the following elements:

Extruder

It is responsible for pushing the material towards the printing system.

Hotend

It is the piece that melts the filament before depositing it.

Printing bed

Surface where the object is constructed.

Stepper motors

They control the printer's movements.

Electronic board

It acts as the brain of the machine.

Power supply

It provides power to all components.

Sensors

They allow advanced features such as:

• Self-leveling.
• Filament detection.
• Recovery after blackouts.

History of 3D printing

Although many people consider 3D printing to be a recent technology, its origins date back several decades.

The first steps (1980s)

The modern history of 3D printing begins in 1984 thanks to Chuck Hull.

Hull developed the technology known as stereolithography (SLA), considered the first commercially viable additive manufacturing system.

This advance made it possible to create physical parts using photosensitive resins hardened by ultraviolet light.

He later founded 3D Systems, one of the most important companies in the industry.

Industrial expansion (1990s)

During the 1990s, new technologies emerged that greatly expanded manufacturing possibilities:

• SLA.
• SLS (Selective Laser Sintering).
• FDM (Fused Deposition Modeling).

However, these machines remained extremely expensive and were primarily reserved for large companies.

Democratization of 3D printing (2005-2015)

The real turning point came with the birth of the RepRap project.

This movement spurred the development of open-source 3D printers capable of manufacturing some of their own components.

Thanks to this, manufacturers such as the following emerged:

• Prusa.
• Creality.
• Anycubic.
• Artillery.
• Elegoo.

Prices began to drop dramatically and 3D printing began to reach homes.

The new generation (2020-2026)

The evolution over the last few years has been spectacular.

Current printers incorporate:

• Artificial intelligence.
• Automatic calibration.
• Multicolor printing.
• Remote monitoring.
• Speeds greater than 500 mm/s.
• Smart cameras.

Brands such as:

• Bambu Lab.
• Prusa.
• Creality.
• Anycubic.
• Elegoo.

They have completely transformed the user experience.

Nowadays it is possible to start printing practically from day one without advanced technical knowledge.

3D printing technologies

One of the most common mistakes is thinking that all 3D printers work the same.

The reality is that there are multiple technologies, each designed for specific applications.

Understanding these differences is essential before choosing a printer.

FDM (Fused Deposition Modeling) 3D Printing

Technology FDM It is currently the most popular in the world.

It uses thermoplastic filament coils that melt and deposit layer by layer.

Advantages

• More economical.
• Easy maintenance.
• Wide variety of materials.
• Ideal for beginners.
• Excellent for functional parts.

Disadvantages

• Lower level of detail.
• More visible layers.

👉 If you want to go deeper, check out our complete guide on filament 3D printers.

SLA 3D Printing

SLA technology uses an ultraviolet laser to solidify liquid resin.

It was one of the first 3D printing technologies developed.

Advantages

• Great precision.
• Very smooth surfaces.
• Excellent level of detail.

Disadvantages

• More expensive equipment.
• Increased maintenance.

MSLA 3D Printing

Technology MSLA It is currently the most widely used among domestic resin printers.

It uses monochrome LCD screens alongside UV sources to cure entire layers simultaneously.

Advantages

• Excellent detail.
• Great speed.
• Reduced cost.

Disadvantages

• Need for washing and curing.
• Resin handling.

👉 You can find out more details in our guide on resin 3D printers.

3D DLP Printing

DLP technology uses digital projectors to harden the resin.

It is especially popular in sectors such as:

• Dentistry.
• Jewelry.
• Medical applications.

SLS 3D Printing

SLS technology uses lasers to fuse dust particles.

It is widely used in industrial environments.

Advantages

• Very resistant parts.
• No support required.

Disadvantages

• High cost.
• Industrial equipment.

MJF 3D Printing

Developed by HP, Multi Jet Fusion technology has become a benchmark within professional manufacturing.

It allows the production of high-quality functional parts on a large scale.

It is currently one of the most widely used technologies in:

• Automotive.
• Aeronautics.
• Advanced engineering.

Which 3D printing technology is best?

There is no universal answer.

The best technology will always depend on the intended use.

As a general rule:

✅ FDM beginners, makers and functional parts.

✅ MSLA/SLA miniatures, jewelry and extreme detail.

✅ SLS/MJF industrial production.

That's why most users start with an FDM printer and later expand their possibilities by incorporating a resin printer.

Types of 3D printers

When a person starts researching about 3D printingHe usually quickly discovers that there are numerous types of printers.

However, for simplicity, we can group them into three main categories that cover most of the needs of home and professional users.

Understanding the differences between them will help you choose your first printer correctly or expand your current equipment.

Filament 3D Printers (FDM)

The filament 3D printers They are the most popular on the market.

They use coils of thermoplastic material that are melted and deposited layer by layer until the final piece is created.

They are currently the preferred option for:

• Beginner users.
• Makers.
• Prototyping.
• Education.
• Manufacturing of functional parts.
• Cosplay.
• Robotics.

Its main advantages are:

• Reduced price.
• Easy maintenance.
• Wide variety of materials.
• Large user community.

Furthermore, in recent years they have evolved enormously thanks to manufacturers such as:

• Bambu Lab.
• Creality.
• Prusa.
• Anycubic.
• Elegoo.

👉 If you want to know the most recommended models currently, consult our guide on the best filament 3D printers.

Resin 3D printers

The resin 3D printers They use photosensitive liquid resins that are hardened by ultraviolet light.

Its main advantage is the ability to produce parts with an extraordinary level of detail.

That is why they are especially popular in sectors such as:

• Miniatures.
• Modeling.
• Jewelry.
• Dentistry.
• Collectible figures.
• Medical applications.

Among its advantages we find:

• Extremely precise finishes.
• Very smooth surfaces.
• Microscopic details.

In return, they require:

• Subsequent washing.
• UV curing.
• Resin handling.

👉 You can check out our full comparison of resin 3D printers to discover the most recommended models.

Professional and industrial 3D printers

The professional 3D printers They are geared towards companies, engineering firms, research centers and industrial production.

These machines usually incorporate:

• Higher print volumes.
• Advanced materials.
• Heated chambers.
• Multi-extrusion systems.
• Industrial certifications.

They are common in sectors such as:

• Aeronautics.
• Automotive.
• Medicine.
• Engineering.
• Industrial manufacturing.

👉 Find out what they are best professional 3D printers currently available.

Which 3D printer should I choose?

As a general rule:

If you are a beginner

The best option is usually an FDM printer.

They offer:

• Lower initial investment.
• Greater ease of learning.
• Less maintenance.

👉 Check out our guide to 3D printers for beginners.

If you are looking for extreme detail

Resin printers are clearly superior.

If you need to produce functional parts

FDM printers remain the best choice.

If you work professionally

You probably need an industrial or professional printer adapted to your materials and processes.

Materials for 3D printing

One of the most fascinating aspects of the 3D printing It is the enormous variety of materials currently available.

Each material offers different properties that can directly influence:

• Endurance.
• Flexibility.
• Durability.
• Visual finish.
• Thermal resistance.
• Final applications.

Choosing the right material is just as important as choosing the printer.

PLA

The PLA (Polylactic Acid) It is the most widely used material in the world.

This is an easy-to-print filament, economical and perfect for beginner users.

Advantages

• Easy printing.
• Little warping.
• Wide variety of colors.
• Ideal for learning.

Disadvantages

• Lower thermal resistance.
• Lower mechanical resistance.

PETG

The PETG It is situated as an intermediate point between PLA and ABS.

It offers an excellent combination between:

• Endurance.
• Ease of printing.
• Durability.

That is why it is one of the favorite materials for functional parts.

ABS

The ABS It is one of the historical materials of 3D printing.

It is characterized by:

• Good mechanical resistance.
• High thermal resistance.
• Durability.

However, it requires more advanced printers due to the deformation problems it can cause.

ASA

The ASA It is an evolution of ABS specially designed for outdoor use.

It stands out for its resistance against:

• UV rays.
• Humidity.
• Climate change.

That is why it is widely used in industrial applications.

TPU

The TPU It is a flexible material capable of producing elastic parts.

It is used to manufacture:

• Covers.
• Together.
• Shock absorbers.
• Flexible components.

Advanced technical materials

Currently, there are also much more specialized materials available:

• Nylon.
• Polycarbonate.
• Carbon fiber.
• Fiberglass.
• Industrial compounds.

These materials allow for the manufacture of extremely resistant parts for professional applications.

👉 We will soon publish our complete guide on materials for 3D printing and the comparison PLA vs ABS vs PETG.

Software for 3D printing

Without software, a 3D printer cannot function.

Software is responsible for transforming digital models into instructions that the machine can interpret.

There are currently three main categories of software.

3D design software

It allows you to create models from scratch.

Some of the most popular programs are:

• Fusion 360.
• Blender.
• Tinkercad.
• FreeCAD.
• SolidWorks.

Slicer Software

Slicers convert the model into print code.

The most commonly used ones currently are:

• OrcaSlicer.
• Priest.
• Bambu Studio.
• PrusaSlicer.
• Chitubox.
• Lychee Slicer.

Remote management software

Modern printers allow you to control prints from anywhere.

Some examples are:

• Bambu Handy.
• Prusa Connect.
• Creality Cloud.

👉 Very soon we will publish our complete guide on software for 3D printing.

Where to download STL files for 3D printing

One of the great advantages of 3D printing is that it is not always necessary to design models from scratch.

There are thousands of platforms where you can download designs ready to print.

Thingiverse

Probably the best-known 3D model library in the world.

It allows free access to thousands of designs created by the community.

Printable

Prusa's official platform has become one of the best current alternatives.

It stands out for:

• Design quality.
• Active community.
• Excellent organization.

MakerWorld

Developed by Bambu Lab, it is growing enormously thanks to the brand's popularity.

Cults3D

It combines free and premium models.

It is especially popular among professional designers.

MyMiniFactory

A reference within the world of miniatures and modeling.

Thangs

A modern platform with a powerful search engine for 3D models.

👉 We will publish a complete guide with the later best pages for downloading STL files for 3D printing.

How to calibrate a 3D printer

One of the factors that most influence print quality is the correct calibration of the machine.

A poorly calibrated printer can produce:

• Poor adhesion.
• Displaced layers.
• Lack of precision.
• Poor finishes.

Therefore, it is essential to periodically review aspects such as:

• Bed leveling.
• Hotend temperature.
• Hot bed temperature.
• Material flow.
• Retraction.
• Printing speed.

Modern printers incorporate automatic systems that greatly simplify this process.

However, understanding the fundamentals of calibration remains essential for achieving professional results.

👉 Soon you will find our complete guide on How to calibrate a 3D printer step by step.

Real applications of 3D printing

Just a few years ago, many people associated the 3D printing only with the manufacture of small decorative objects or simple prototypes.

However, the current reality is very different.

The additive manufacturing It is transforming entire sectors of the economy and is used daily in industries where accuracy, customization, and speed are critical.

Its ability to manufacture complex parts on demand has opened up possibilities that were previously unfeasible using traditional methods.

Let's look at some of the sectors where 3D printing is having the greatest impact.

3D printing in medicine

Medicine is probably one of the fields where 3D printing has generated the most impressive advances.

It is currently used to manufacture:

• Personalized prostheses.
• Surgical guidelines.
• Anatomical models.
• Implants.
• Medical devices.

Thanks to the total customization of each piece, healthcare professionals can adapt treatments to the specific needs of each patient.

3D printing in engineering and prototyping

One of the most widespread uses of professional 3D printers It is the development of prototypes.

Previously, manufacturing a test piece could take weeks.

Today it is possible to design it in the morning and have it physically in a matter of hours.

This greatly speeds up the processes of:

• Industrial design.
• Product development.
• Investigation.
• Component validation.

3D printing in automotive

Automakers use 3D printing to:

• Functional prototypes.
• Tools.
• Test parts.
• Production of specific components.

Companies such as BMW, Ford, Porsche or Mercedes-Benz have been integrating additive manufacturing technologies into their production processes for years.

3D printing in aeronautics

The aerospace industry has found 3D printing to be a fundamental tool for reducing weight and optimizing components.

Some parts manufactured using 3D printing allow:

• Reduce costs.
• Lose weight.
• Improve performance.

All this without compromising structural resistance.

3D printing in architecture

Architects use 3D printers to manufacture:

• Models.
• Urban models.
• Building prototypes.

Furthermore, there are already projects capable of printing entire homes using additive construction systems.

3D printing in education

More and more educational centers are incorporating 3D printers into their classrooms.

This allows teaching concepts related to:

• Technology.
• Design.
• Engineering.
• Programming.
• Digital manufacturing.

3D printing has become an extraordinary educational tool.

3D printing for individuals

At a domestic level, the possibilities are practically endless.

Many users manufacture:

• Organizers.
• Tools.
• Supports.
• Decoration.
• Custom accessories.
• Out-of-print spare parts.

For this reason, 3D printing continues to grow year after year.

Advantages and disadvantages of 3D printing

Like any technology, 3D printing has advantages and limitations that should be known before investing in a printer.

Advantages of 3D printing

Total customization

Each piece can be completely adapted to the user's needs.

Manufacturing on demand

It is not necessary to produce large quantities.

We can only manufacture the necessary parts.

Reduction of prototyping costs

It allows products to be developed much faster and economically.

Decentralized production

Objects can be manufactured locally without relying on complex supply chains.

Wide variety of materials

There are currently hundreds of different materials for specific applications.

Accessibility

It has never been easier to get started in the world of 3D printing.

Disadvantages of 3D printing

Limited speed

Some pieces require several hours to complete.

Learning curve

Although modern printers are much simpler, it is still necessary to learn certain basic concepts.

Variable finishes

Depending on the technology used, post-processing may be necessary.

Cost of professional equipment

Industrial solutions continue to require significant investments.

Material limitations

Some applications continue to rely on traditional manufacturing processes.

Future of 3D printing in 2026 and the coming years

The growth of 3D printing is far from stopping.

In fact, many experts believe that we are still in the early stages of mass adoption of this technology.

The main current trends include:

Multicolor 3D printing

More and more printers are incorporating systems capable of printing multiple colors and materials simultaneously.

Advanced automation

Automatic calibration, error detection and artificial intelligence will continue to reduce complexity for the end user.

New materials

Research continues to develop materials:

• More resistant.
• Lighter.
• More sustainable.
• More specialized.

Distributed production

Local manufacturing using 3D printing will reduce dependence on traditional logistics chains.

Integration with Artificial Intelligence

AI is already starting to help in:

• Generative design.
• Parts optimization.
• Automatic error detection.
• Print settings.

Construction using 3D printing

The printing of homes and complete structures will continue to grow over the next few years.

Conclusion

The 3D printing It has ceased to be an experimental technology and has become a real tool capable of transforming the way we design, manufacture, and customize products.

Today, anyone can access extremely advanced machines capable of producing functional parts, prototypes, decorative objects, or professional components from their own home.

Furthermore, the current ecosystem is more complete than ever.

We have:

• Faster printers.
• More advanced materials.
• Simpler software.
• Larger communities.
• Thousands of designs ready to print.

If you are starting out, our recommendation is to start with one filament 3D printer and gradually familiarize yourself with concepts such as materials, calibration, and 3D design.

As you gain experience you will be able to explore more advanced technologies such as resin printing or professional systems.

The most important thing is to understand that 3D printing is not just a technological hobby.

It is a tool with real applications capable of helping you create, repair, learn, undertake and even develop new professional projects.

And everything indicates that in the coming years it will continue to gain prominence in practically all sectors of the economy.

FAQ's: Frequently Asked Questions about 3D Printing