What Slicing Actually Means
You downloaded an STL file. You have a 3D printer. Now what?
Before any printer can build your model, that STL file needs to be translated into a language the printer understands. That translation is called slicing, and the software that does it is called a slicer.
The slicer takes your 3D model, cuts it into hundreds or thousands of horizontal layers, calculates the exact path the nozzle needs to travel for each one, and generates a G-code file. G-code is the instruction set your printer reads: move here, heat to this temperature, extrude this much filament, repeat 847 more times until the model is done.
Without slicing, your STL file is just a shape on a screen. After slicing, it becomes a set of precise instructions your printer can actually follow.
Which Slicer Should You Use?
There are several excellent free options. The right one depends on your printer.
Bambu Studio
Best for: Bambu Lab printer owners (X1C, P1S, A1, A1 Mini)
Bambu Studio is the fastest path from STL to printed object for anyone on a Bambu printer. Pre-built profiles for every Bambu machine and filament type mean most settings are already dialed in. Drag in your STL, hit Slice, send to printer. The interface is clean and beginner-friendly without hiding advanced settings when you need them.
All OreKo 3MF files are pre-configured for Bambu Studio.
PrusaSlicer
Best for: Prusa printers, or any printer not Bambu
PrusaSlicer is free, open-source, and works with virtually every FDM printer on the market. It has three interface modes: Simple, Advanced, and Expert. Start in Simple mode and you will not be overwhelmed. The layer preview is excellent for catching problems before they reach the print bed.
PrusaSlicer accepts STL, 3MF, OBJ, and AMF files.
Ultimaker Cura
Best for: Creality, Ender 3, and most budget FDM printers
Cura is the most widely used slicer in the world and is the default recommendation for Ender 3 users. It has a massive plugin ecosystem and one of the best communities for troubleshooting. The recommended settings mode keeps it simple for beginners while custom mode exposes hundreds of fine-tuning options.
Free download from Ultimaker’s website.
Step-by-Step: Slicing Your First STL File
Using Bambu Studio as the example, but the steps are nearly identical in PrusaSlicer and Cura.
Step 1: Download and Open the Slicer
Download Bambu Studio (free at bambulab.com), PrusaSlicer (free at prusa3d.com), or Cura (free at ultimaker.com). Install and open it. The first time you open it, it will ask you to set up your printer model. Select your exact machine from the list.
Step 2: Import Your STL File
Drag and drop the STL file onto the slicer workspace, or use File > Import. The model will appear on the virtual build plate. You can rotate, scale, and reposition it at this stage. If a model came with a recommended orientation, use that.
Step 3: Set Your Key Parameters
At minimum, set these before slicing:
- Filament type (PLA, PETG, etc.)
- Layer height (0.20mm for most prints)
- Infill density (15% for most prints)
- Supports (off for no-support models like most OreKo files)
For OreKo models, the recommended settings are listed on each product page.
Step 4: Slice and Export
Click the Slice button. The slicer processes the model and shows you a layer-by-layer preview, estimated print time, and filament usage. Review the first few layers in the preview to make sure the base looks correct.
Export the G-code to an SD card, USB drive, or send wirelessly to your printer if it supports WiFi.
Key Settings Explained for Beginners
Layer Height
How thick each printed layer is. 0.20mm is the standard starting point. Use 0.16mm or 0.12mm for models with fine detail, like the logo caps on OreKo deck boxes. Use 0.28mm when speed matters more than detail on large, simple parts.
Infill Density
How solid the inside of the print is. 15% is standard for most decorative and semi-functional parts. Use 100% for small structural pieces, coins, and anything that needs to be fully solid. Use 10% for large boxes and enclosures where wall thickness handles strength.
Wall Lines (Perimeters)
How many loops of plastic form the outer shell. 2 walls is standard. 4-6 walls for functional parts that need strength. More walls add print time but make the part significantly tougher.
Supports
Extra plastic printed underneath overhanging sections to keep them from drooping. Many models are designed to print without them. If the listing says no supports needed, turn them off in your slicer.
Using a 3MF File Instead of STL
If you downloaded a 3MF file instead of an STL, the slicing process is almost identical. The key difference is that 3MF files can store print settings inside the file itself.
OreKo’s Bambu Studio 3MF files come pre-configured: filament type, layer height, infill, support settings, and plate layout are already set. Open the 3MF in Bambu Studio, review the settings, and slice. Most of the work is already done.
For non-Bambu printers, use the individual STL files and enter the settings from the product page manually.
Common First-Time Slicing Mistakes
Leaving supports on for a no-support model. Unnecessary supports waste material, add print time, and can leave marks on the surface. If the designer says no supports, turn them off.
Printing at too low an infill for small parts. 15% infill on a tiny coin or logo cap leaves almost nothing inside. Small detailed pieces need 100% infill to hold their shape and definition.
Not checking the layer preview. Always scroll through the first 5-10 layers in the preview before you export. You’ll catch orientation problems, missing supports, and thin walls before they become failed prints.
Wrong filament selected in the slicer. The slicer uses filament type to calculate print temperature and cooling. If you load PETG but the slicer thinks it is PLA, the temperature will be wrong and you will get poor layer adhesion.
Ready to Slice Something?
Download an OreKo STL file, load it into your slicer, and follow the settings on the product page. Everything is pre-tested and ready to print.
