Note sull'episodio
Every 3D print is mostly air on the inside, and one number in the slicer decides how much. In this episode we pull apart the infill percentage: what it is, why printed parts are not solid, and what dragging that slider from 15 to 50 to 100 per cent actually does to strength, weight, print time and the price you pay.
You'll come away understanding what infill is and why hollow is normal; what grid, triangles, honeycomb, cubic, gyroid and lightning patterns are each good for; why strength rises with density but strength per gram falls, and why CNC Kitchen's testing shows extra walls beat extra infill for most loads; how infill drives grams, hours and dollars, with a worked example of a 100 gram part at 15, 50 and 100 per cent; when to go high (threads, compression, tiny stressed parts) and when 10 to 15 per cent is plenty (decorative pieces, enclosures); how low infill causes pillowing on top surfaces; and why gyroid is the go-to for flexible TPU.
For anyone who has ever hovered over an infill slider and wondered whether the higher number was worth it, whether on your own printer or at the checkout of a print service.
Need something printed? Upload your STL, 3MF, OBJ or STEP file at www.3dprinting.zone for an instant price, shipped Australia-wide.
Sources: CNC Kitchen; Prusa Knowledge Base and Prusa blog; UltiMaker Cura documentation; Obaide and Saad, Revue des Composites et des Matériaux Avancés (2025); FilamentHub Australia price guide; 3dprinting.zone infill guide.