Post-Processor (Fusion 360)
The script that converts Fusion 360's neutral toolpath data into G-code for a specific CNC machine controller.
Definition
Toolpaths in Fusion are described in a generic intermediate form. The post-processor (JavaScript file, typically .cps) translates them into the specific G/M codes the machine expects: Fanuc, Haas, Mazak, Tormach, Centroid, GRBL, LinuxCNC, etc. Fusion 360 ships with hundreds of stock posts; many are user-edited for shop-specific machine quirks.
Why it matters
Wrong post = invalid G-code = the machine alarms, ignores commands, or crashes. Verifying the post against a known machine is non-negotiable.
Common pitfalls
- Using a generic post for a specific controller — missing or wrong M-codes.
- Editing the post without version control — fixes get lost on next post update.
- Skipping NC simulation before running on the machine.
This concept is a core structural element of the Fusion 360 drafting and engineering environment developed by Autodesk. Autodesk's cloud-native unified design-and-make platform — parametric/direct hybrid modelling, CAM, sheet metal, simulation, electronics, and generative design in one subscription.
Relevant Fusion 360 FAQs
❓ Is Fusion 360 truly free for personal use?
Yes, but with restrictions. The personal-use tier is for hobbyists with under $1k/year in revenue from Fusion-created work. It limits active documents (10 editable at once), removes simulation/generative-design/electronics/extensions, simplifies CAM (no 5-axis, no multi-setup), and has restricted export options. Autodesk has progressively narrowed the free tier; verify current terms before relying on it commercially.
❓ What's the difference between Fusion 360 and Fusion Industry?
There is no separate 'Fusion Industry' product as of writing. 'Fusion 360' is the unified product. Extensions (Manufacturing, Simulation, Generative Design, etc.) add capability. Autodesk has also branded vertical packages (Fusion 360 with Inventor capability) at times; consult current Autodesk pricing pages.
❓ Can Fusion 360 work offline?
Yes — with caveats. Fusion caches files locally and supports a 'work offline' mode for up to 2 weeks. Cloud render, generative design, electronics simulation, and forced sync features require connectivity. For continuous offline work, Inventor is a better fit.
⚡ Concept Self-Test
🎓 Recommended Practice Lessons
Step-by-step practical exercises and certification-aligned paths chosen by our editors to master this concept:
Fusion 360 Professional Design & Engineering Specialization
Autodesk Certified Professional - Fusion 360 Exam Study Guide & Mock Practice
🌳 Semantic Crossroads & Navigation Pathways
Trunk-Branch-Leaf ModelCore glossary, interactive graph, and domain-wide concept index.
Parent design environments and platforms implementing this method natively.