Walls vs Infill: Why the Outline of a 3D Print Carries the Load

Most people chasing a stronger 3D print reach for the infill slider. The testing says they are usually turning the wrong dial. In this episode we look at walls, also called perimeters or wall loops: the solid outlines a printer traces around every layer, and why adding a couple more of them so often beats piling on infill for the same plastic.

You'll come away understanding what walls and perimeters are and why two is the out-of-the-box setting; the simple physics of why the outside of a part does most of the work when it bends, with a tube-versus-rod example; what CNC Kitchen's hook tests and HackSpace magazine's bending test actually measured, including a same-weight comparison where extra walls won by about 22 per cent; where infill still earns its place (crushing loads, top surfaces, flexible TPU); and practical settings, from three walls for everyday parts to four to six for brackets and hooks, plus wider lines, Arachne and the extra walls you get around screw holes.

Handy if you print functional parts at home, or if you are designing a part to have printed and want it to survive real use without paying for plastic it doesn't need.

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 (Stefan Hermann); HackSpace magazine, "Experiments with strong 3D prints"; Prusa Knowledge Base; OrcaSlicer Wiki; Bambu Lab Wiki; UltiMaker Cura settings definitions.

Denne episoden er hentet fra en åpen RSS-feed og er ikke publisert av Podme. Den kan derfor inneholde annonser.

Episoder(16)

Who Owns Your Print? Creative Commons, Commercial Use and Australian Law

You can download a model in ten seconds and print it by lunchtime, but can you give it away, sell it at the Saturday market, or print a replacement part for something you own? This episode untangles t...

29 Okt 25min

This Week in 3D Printing: Bambu's Nine-Tool H3C, a US$699 Formlabs and a Scanner Rush

The week of 19 to 25 October 2026 in 3D printing, for makers and small businesses, plus two stories from earlier in October we had not yet covered. Bambu Lab teased a nine-tool printer, Elegoo put a d...

25 Okt 24min

The Bambu Lab Effect: How One Company Reset What a 3D Printer Should Be

In 2022 a two-year-old Shenzhen start-up founded by ex-DJI drone engineers put a printer on Kickstarter and raised about seven million US dollars in a month. Four years later Bambu Lab ships more entr...

8 Okt 25min

Silk, Matte, Glow and Speciality PLA: What Changes and What Doesn't

Walk into any filament shop, online or otherwise, and plain PLA is surrounded by cousins: silk, matte, glow-in-the-dark, wood, marble, carbon fibre, sparkle, rainbow, colour-changing, and the mysterio...

6 Okt 21min

This Week in 3D Printing: California's Gun-Blocking Printer Law, Bambu's Matte PETG, Prusa Goes to 400 °C

The week of 26 September to 4 October 2026 in 3D printing, for makers and small businesses. California signed a law that will one day require printers to recognise and refuse gun files, Bambu Lab laun...

4 Okt 15min

Printing Replacement Parts: Fix the Thing Instead of Replacing It

A dishwasher basket wheel snaps, a fridge shelf clip crumbles, the bracket on a roller blind gives way, and suddenly a perfectly good appliance is heading for the kerb over a few grams of plastic. Thi...

30 Sep 27min

MakerWorld, Printables and Thingiverse: Who Gets Paid and What You Can Print

Millions of free 3D models are a click away, but where do they come from, who pays the people who design them, and what are you actually allowed to do with a file once you have downloaded it? This epi...

30 Sep 24min