Essential 3D Printing Terms Every Beginner Should Know

If you’re just getting started with 3D printing, you’ve probably come across a lot of unfamiliar terminology. Understanding the basic 3D printing terms is key to improving your prints and feeling confident with your setup. Below are some of the most important concepts every beginner should know.

Slicing

Before anything gets printed, your 3D model must go through a process called slicing. This is done using software known as a slicer, which converts your design into instructions your printer can understand. It essentially breaks your model into hundreds (or thousands) of thin layers and generates a file that tells the printer how to build the object step by step. Mastering slicing is one of the first steps in learning to 3D print successfully.

Infill

Infill is used to refer to the internal structure of your print. Instead of printing objects completely solid, most prints have a patterned interior to save material and reduce print time. Infill is measured as a percentage—low infill (10–20%) is lighter and faster, while higher infill (50–100%) makes parts stronger and more durable. Adjusting infill is an important part of any beginner 3D printer guide.

Layer Height

Layer height determines how thick each printed layer is, typically measured in millimeters. Smaller layer heights (such as 0.1 mm) produce smoother, more detailed prints but take longer. Larger layer heights (e.g., 0.2–0.3 mm) print faster but may result in visible lines. Finding the right balance is a key part of understanding 3D printing basics.

Supports

Sometimes a design includes overhangs or complex shapes that can’t be printed in mid-air. That’s where supports come in. Supports are temporary structures printed underneath these areas to hold them up during printing. Once the print is complete, they can be removed. Knowing when and how to use supports will greatly improve your print success rate.

Extrusion

Extrusion is the process of pushing melted filament through the printer’s nozzle to create each layer. The printer heats the material and deposits it precisely to form your object. Issues with extrusion—such as under- or over-extrusion—can lead to poor print quality, so it’s important to understand how it works.

Learning these essential terms will give you a strong foundation in 3D printing. As you continue exploring, these concepts will become second nature and help you create better, more reliable prints.