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Resources

A curated list of the sites worth bookmarking — where to find models, how to calibrate, where the real material numbers live, and where to ask for help. Every link was checked when this page was written; sites change, so report anything dead.

Data sheets beat forum posts

When a number matters (print temperature, HDT, drying time), get it from the manufacturer's technical data sheet (TDS) for that exact product, not from a forum thread or a reseller listing. See Material Selection for how to read and compare them.

Model repositories

Site What it's good for
Printables Prusa's free model site; strong functional-print community, contests, and print-tested files
MakerWorld Bambu Lab's site; huge catalogue, ready-to-print 3MF profiles, and browser customizers (Parametric Model Maker)
Thingiverse The original repository; vast back-catalogue of older designs and Customizer models
Thangs Search engine across repositories with geometric search — upload a shape, find similar models
Cults Marketplace of free and paid designs (STL, 3MF, STEP)

Check the licence

Most models carry a Creative Commons or custom licence. NC (non-commercial) means you can't sell prints; some designers offer a separate commercial tier.

Calibration guides

Guide Why use it
Ellis' Print Tuning Guide Thorough, methodical tuning guide — first layer, pressure advance, extrusion multiplier, and more
OrcaSlicer Wiki — Calibration Guide Recommended order for Orca's built-in tests: temperature, flow, pressure advance, retraction, max volumetric speed
OrcaSlicer Wiki Reference for every Orca setting
Teaching Tech — 3D Printer Calibration Step-by-step calibration (mainly Marlin) with G-code generators for test prints
Klipper — Configuration checks First checks after installing Klipper
Klipper — Pressure advance Tuning pressure advance on Klipper
Klipper — Resonance compensation Input shaping to reduce ringing
Prusa Knowledge Base Official Prusa guides; the calibration and troubleshooting articles are useful on any printer

The calibration sequence itself is covered in Slicers & Firmware and Print Settings.

Material data sheets

Brand Where the TDS lives
Prusament One page per material with print settings, a tech-sheet download and an SDS
Polymaker Polymaker Wiki TDS index, a PDF per product
Bambu Lab — filament guide Comparison of Bambu filaments; each product page carries its TDS
Bambu Lab Wiki — Filaments Per-filament print and drying guidance
eSUN Download centre: technical data sheets and guides, organised by material series
Overture TDS and SDS PDFs for most filament lines, plus print profiles

Communities

Community Best for
r/3Dprinting General news, show-and-tell, discussion
r/FixMyPrint Diagnosing failed prints — post a clear photo plus printer, slicer and material
r/prusa3d Prusa printers, Prusament and PrusaSlicer
r/BambuLab Bambu printers, AMS and Bambu Studio
r/gridfinity Gridfinity sets and bin ideas
r/MultiBuild Multiboard / MultiBuild
Klipper Discourse Official Klipper forum — configs, macros, bug reports
Prusa Forum Official Prusa community forum
Bambu Lab Community Forum Official Bambu forum

YouTube channels

Channel Known for
CNC Kitchen Measured strength testing — infill, walls, heat-set inserts, annealing, materials
Teaching Tech Calibration, upgrades and printer reviews
Made with Layers (Thomas Sanladerer) In-depth explainers and reviews, firmware and hardware deep dives
Maker's Muse Design-for-printing, print-in-place mechanisms, CAD tips
Slant 3D Design for print farms and production — short, practical DFM tips
Vector 3D Printer reviews, tests and tutorials
3D Printing Nerd Printer reviews and community news
Uncle Jessy Printer and resin reviews, beginner-friendly
Zack Freedman Creator of Gridfinity; maker projects
Keep Making Creator of Multiboard; workshop organisation

CAD learning

Resource Covers
FreeCAD Wiki — Tutorials Official tutorials, including Basic Part Design and Sketcher
Onshape Learning Center Free self-paced Onshape courses
Autodesk Fusion — self-paced learning Official Fusion learning paths with videos and tutorials
Fusion Help Fusion reference and step-by-step tutorials
OpenSCAD Documentation Official docs hub
OpenSCAD CheatSheet One-page language reference
OpenSCAD User Manual Full manual (Wikibooks)
BOSL2 Wiki The standard OpenSCAD library — threads, rounding, attachments
build123d docs Python CAD on OpenCascade; exports STEP and STL
CadQuery docs Python parametric CAD, also OpenCascade-based
Blender Manual Official manual — for organic/sculpted models rather than precise parts

For which tool to pick, and STL vs 3MF vs STEP, see CAD & Tools.

Generators & tools

Tool What it does
gridfinity.xyz Gridfinity wiki with a list of generators and CAD libraries
Gridfinity Generator Web tool for Gridfinity boxes, baseplates and STL cut-outs
Perplexing Labs Gridfinity Generator Form-based Gridfinity bins and baseplates (also hosts an openGrid tile generator)
Gridfinity Rebuilt Parametric OpenSCAD bins and baseplates
openGrid useful links Official index of openGrid generators, snaps and adapters
MultiBuild tools Multiboard planner, plate generators, label generator
OpenSCAD Customizer Built-in parameter panel — run any parametric .scad locally instead of a web customizer
Thingiverse Customizer The original web customizer for OpenSCAD models
Text2STL Free text/label/sign generator that exports STL

Details on each modular system, plus CadQuery/build123d libraries, are in Modular Systems.

Sources & further reading