Getting started with 3D printing, a beginner's guide
How a 3D printer works, which printer and materials to choose and how to get your first successful print. In short, on one page, with the details in a free 53-page guide (in Romanian).
- Free 53-page guide, in Romanian
- Free online courses for beginners
- Free advice on choosing a printer
How it works, in short
Four things to know before your first print.
Objects are built layer by layer
3D printing, also called additive manufacturing, starts from a digital model. The printer lays down material layer by layer until the object is finished.
On FDM printers, the most widespread type, a plastic wire called filament melts in the print head. The head lays it down in thin lines, and each layer cools before the next one comes.
The slicer prepares the print
The 3D model, usually an STL or 3MF file, goes through a program called a slicer. It cuts the model into layers and turns everything into instructions for the printer.
In the slicer you also choose the material, the layer height and the infill, add supports for the parts that hang in the air and see how long the print takes and how much material it uses.
Where models come from
You download them free from online libraries such as Printables, MakerWorld or Thingiverse, draw them in a CAD program or scan an object with a 3D scanner.
If you want to design your own parts, start with a free CAD program for beginners. On our courses page there is also an introduction to 3D modeling in Fusion 360.
What else you need
Besides the printer, you need a few simple things. Most printers come with ready-made settings for common materials such as PLA.
- A computer to run the slicer
- Filament, PLA to start with
- 3D models, downloaded or drawn by you
- Optionally, a CAD program for your own parts
Which technology to choose
The most common 3D printing technologies are FDM, resin and SLS. For a beginner, the right choice is almost always FDM.
| Technology | How it prints | Good for | What to watch out for |
|---|---|---|---|
| FDM, with filament | Melts a plastic wire and lays it down layer by layer | Prototypes, functional parts, models, objects for the home | Layer lines show on the surface, and very fine details are limited by the nozzle |
| Resin (MSLA, SLA) | Hardens a liquid resin with UV light, layer by layer | Miniatures, jewellery, dental models, fine detail | Parts are washed in isopropyl alcohol and cured with UV. You work with gloves, in a ventilated room |
| SLS, with powder | Sinters a powder with a laser, layer by layer | Technical parts and small batches | It is a professional technology, for workshops and labs |
For a beginner we recommend an assembled FDM printer with automatic calibration, for example the Bambu Lab A1 mini or the Prusa MK4S.
Which materials to use
With FDM, the material comes as filament, on a spool. The most common are PLA, PETG and ABS, and for flexible parts there is TPU.
PLA
The first material you try. It prints easily without an enclosure and comes in many colors. It does not cope with heat: a part left in a car in summer will deform.
PETG
The next step, for functional parts: brackets, containers, housings. It handles heat better than PLA and still prints on open printers. Keep it dry, otherwise it leaves strings.
ABS and ASA
For technical and outdoor parts, and ASA also stands up to sunlight. They need an enclosure and ventilation, because they warp as they cool and smell while printing.
TPU
A flexible filament, like soft rubber, for seals, grips and protective parts. It prints more slowly than the others.
Resins and engineering filaments, from nylon and carbon fibre to PEEK, are explained in detail in the guide.
First steps to your first print
Set up the printer
Small printers come from us assembled and calibrated. Put it on a stable table, switch it on and load the filament.
Print a test model
Start with a small object from the models that come with the printer. This way you check that the first layer sticks well to the plate.
Learn the slicer
Install your printer's slicer, for example Bambu Studio or PrusaSlicer. Start from the ready-made PLA profile and change one setting at a time.
Print your own models
Download free models or design your own. When you need stronger parts, move from PLA to PETG.
Want to learn step by step? On our courses page you will find free online beginner courses for the Prusa MK4S, MINI+, XL and CORE One printers.
Beginner mistakes and how to avoid them
Most problems with first prints come down to the same few causes.
The first layer does not stick
Clean the print plate with isopropyl alcohol, redo the first layer calibration and check the plate temperature recommended for the material.
Filament kept in damp air
Filament absorbs moisture from the air and leaves strings between parts of the print. Keep it in sealed bags in a dry place and dry it when needed.
Overhangs without supports
Areas angled at more than 45 degrees or hanging in the air need supports. Turn them on in the slicer before you start the print.
Models that are too hard at first
Start with small, simple objects. Increase the complexity after your first successful prints.
The wrong material
PLA deforms with heat. For parts that sit in the sun or near a heat source, choose PETG, ASA or ABS.
No maintenance
Clean the plate and the nozzle and check the belt tension from time to time. The nozzle wears faster with abrasive filaments, such as carbon fibre ones.
Where we can help
With choosing a printer, with learning, or with the parts you do not want to print yourself.
Advice on choosing a printer
Tell us what you want to print and we recommend the technology, printer and materials that fit your budget.
Get free advice Catalog3D printers
Prusa, Bambu Lab, Creality, CreatBot and other makers, for home, schools and production.
See the printers PackageThe START package
A Prusa MK4S, assembled and calibrated, 4 kg of filament and training from our team.
See the package Online3D printing courses
Free beginner courses on Prusa printers, plus courses on PrusaSlicer, design for printing and post-processing.
See the courses ServiceOn-demand 3D printing
Upload your model, get an instant cost estimate and we print the part for you, in FDM, resin or SLS.
Estimate the cost From the blog10 questions before you buy a 3D printer
Answers to the questions beginners ask us most often: print time, software, models and materials.
Read the articleFrequently asked questions
Cannot find the answer? Write to us or call us.
How hard is it to learn 3D printing?
With a modern printer that comes assembled and calibrated, you make your first print on day one. You understand the basic settings after 2-3 weeks of use.
What do I need besides the printer?
A computer to run the slicer, filament and 3D models. If you want to design your own parts, you also need a CAD program.
Which material should I use for my first prints?
PLA. It prints easily, needs no enclosure and forgives setting mistakes. When you need stronger parts or parts that face heat, move to PETG.
Which printer do you recommend for a beginner?
An assembled FDM printer with automatic calibration and ready-made settings for PLA and PETG, for example the Bambu Lab A1 mini or the Prusa MK4S. The Prusa MK4S also comes in our START package, with 4 kg of filament and training.
How long does a print take?
It depends on the size of the object, the layer height and the infill. A small object takes a few hours, and the slicer shows you the estimated time before you start the print.
Can I print in several colors?
Yes. You need a system that changes the filament automatically, such as AMS on Bambu Lab or MMU3 on Prusa, or a printer with several print heads, such as the Prusa XL.
What if I do not want to buy a printer yet?
You can order the part from us. Upload your model on our 3D printing services page, get an instant cost estimate and we do the printing.
Want every detail? Get the full guide
The 2026 edition, with 18 chapters on technologies, printers by field, filaments, common errors and post-processing. They are grouped by theme below. It is free, by email, and written in Romanian.
What is inside · PDF, 53 pages
- Printers for 8 fields, from hobby and schools to production, dental work and medicine
- A comparison table of popular printers and indicative prices
- How to choose by object size and by technology
- FDM in depth and multicolor printing
- Large-format printing and surface quality
- FDM filaments compared, from PLA to PEEK
- Common errors, post-processing and slicing software
- Resin printing, IRIS services, FAQ and a glossary