Guides for 3D printing QR codes
What we have worked out getting these codes to print and to scan: the sizes that work, the filaments that ruin a read, and the slicer settings nobody mentions. No filler, and the maths done.
5 of the 35 guides are translated so far. The rest are in Spanish.
How to 3D print a QR code that scans first time
The long one: the nine steps between a printed QR that works and one that ends up in a drawer.
10 min read
What size does a 3D printed QR code need to be
The whole calculation, with tables for 0.4 and 0.6 mm nozzles and how size relates to scanning distance.
7 min read
Which filament pairs work and which ones ruin the scan
Why red on black does not read even though it looks different, and the list of pairs that do work.
6 min read
Your 3D printed QR code will not scan: nine causes and their fixes
An ordered diagnosis, from the most common cause to the rarest, with the check that rules each one out.
8 min read
QR code keychains: sizes, the ring hole and durability
Where the hole goes so it does not eat the quiet zone, what thickness survives a pocket, and how many fit per plate.
6 min read