AR4 Mark 5: This Open-Source 6-Axis Robot Arm Is Finally Done
A six-axis robot arm sitting on your desk used to mean five figures and a service contract. Chris Annin's AR4 quietly tore that idea up — and with the…
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I compared every free 3D print pricing calculator. Here's what I found (2026)
The tools I tested LayerMath (layermath.com) The most feature-rich calculator I found. Covers material, electricity (including heat-up phase), labour,…
FDM 3D Printing in 2026: Engineering Structural Parts Beyond Prototyping
For years, Fused Deposition Modeling (FDM)—also known as Fused Filament Fabrication (FFF)—was primarily viewed as a tool for rapid prototyping. Engine…
How to get live 3D print pricing in Google Sheets with one formula
If you sell 3D printed items on Etsy (or anywhere else), you've probably done the maths in your head or in a scrappy spreadsheet. Filament cost, elect…
I Built an AI 3D Model Generator — Here's How I Handle Meshes in the Browser
I shipped www.imgto3d.ai a few months ago. It's an AI-powered 3D model generator : you upload an image, pick a generator (upscale, denoise, face recov…
What Nanochon's Series A Tells Us About the Bio 3D Printing Commercialization Threshold
A $2,000 Implant and a Multi-Million Dollar Question In early 2025, Nanochon closed a Series A round to commercialize its 3D-printed cartilage scaffol…
I Built a Browser-Based 3D Print Overhang Analyzer — No Backend, No Uploads
Last week I released SupportSage, a CLI tool that analyzes STL geometry and generates optimized support structures. The response was great, but there …