3d-printing — byitl blog

Cost breakdown of one 3D-printed prototype enclosure: $1,589 total, of which about 99% is design and labor (18 hours of CAD plus finishing at $75/hr) and just $2.64 is filament.

What a 3D-printed prototype enclosure actually costs in 2026

Filament is under half a percent of the bill. Here's the itemized total for a palm-sized ESP32 enclosure, design time included.

July 31, 2026 · 11 min read

Break-even chart: 3D printing has no tooling cost but never gets cheaper per unit, while injection molding starts at a $10k tool then costs a few dollars per part — the two cross at roughly 500 to 1,000 units a year.

From 3D-printed enclosure to injection molding: when to switch

A single-cavity prototype steel tool for a palm-sized enclosure runs about $10k — we've had our own parts quoted. Here's the break-even math on when it pays.

July 27, 2026 · 10 min read

The real cost of DIY enclosure design in Fusion 360 — a $680/yr license plus ~24 hours of your time, $1,800–3,600, versus $1,500 flat to hire it out.

DIY your enclosure in Fusion 360 vs. hiring it out — the real cost breakdown

DIY in Fusion 360 is right for some founders. Here's the exact line where it stops being cheaper — license terms, tolerance stacks, real hours.

July 23, 2026 · 8 min read

STL vs STEP: one curve shown as a faceted triangle mesh on the left and a smooth editable solid on the right.

STEP vs STL: which file your enclosure design actually needs

STL is a triangle mesh. STEP is real CAD geometry. Converting one direction is routine; the other throws away everything you'd want to change later.

July 22, 2026 · 11 min read

A bare green HC-01 rev D circuit board above the jumper-wire prototype it replaced, which sits on a grey 3D-printed enclosure surrounded by loose wires

From jumper wires to a custom PCB: building the HC-01 humidor controller

An ESP32 rat's nest became a four-revision custom board. The most expensive mistake was a sensor we never actually measured.

July 16, 2026 · 4 min read