Glossary · Software

3D printing

Slicer

The programme on the computer that slices a 3D model into layers and creates the instructions for the printer from it.

Explained in more detail

Converts a model (STL, 3MF, STEP) into G-code or a manufacturer-specific format. This is where layer height, wall count, infill, temperatures, speeds, cooling and supports are set. Widely used slicers are PrusaSlicer, OrcaSlicer, Bambu Studio and UltiMaker Cura. Good profiles often affect quality and print time more than the printer itself.

Where does the term come from?

From English slice. The slicer breaks the model down into thin layers because the printer builds the part layer by layer.

In practice

• Start with the manufacturer's profile for your printer and your filament; it is tested and suits the hardware.
• Change only one setting at a time and save the results in the filament profile, preferably with the manufacturer and colour in the name.
• Use the preview: it shows layer by layer where supports, bridges and travel moves occur, before any filament is used.
• Save projects as 3MF, then settings, colours and placement are preserved. An STL file contains only the shape.

Not to be confused

A slicer is not a CAD program: it prepares a finished model for printing. You can only design or fundamentally change the shape in it to a very limited extent.

Frequently asked questions

Which slicer is the best?

There is no single best one. The printer manufacturer's slicer is usually the best start because it has matching profiles. All the major slicers are free and read STL and 3MF.

What is G-code?

G-code is the command language the slicer generates for the printer. Line by line, it contains movements, temperatures and filament feed, tailored to a particular printer and a particular material.