CAD and Fusion
VendorCAD applies parameters to an Autodesk Fusion master and returns manufacturing geometry. The browser never runs Fusion.
Fusion master
Upload a .f3d as the version master (POST /api/parts/{id}/fusion-master in the App). Production stores tenant masters separately from demo templates. Do not overwrite the shared demo master with customer CAD.
The master must already be parametric. VendorCAD maps App parameters onto Fusion parameters — it does not invent a model from a blank file.
When geometry builds
Builds run on Apply / Generate, not on every slider tick. When Fusion live is enabled, the App submits a ParamToStep work item. Typical production rebuilds complete in seconds to tens of seconds, then return STEP (and STL for preview) plus mass properties when the job succeeds.
Preview vs manufacturing file
| Artifact | Use |
|---|---|
| STL (or similar mesh) | On-screen 3D preview |
| STEP | Manufacturing handoff when rules pass |
| DXF | Only when the process class requires a flat or profile export |
See Manufacturing package for process-specific files.
OnShape
OnShape live builds are not on the current Vercel production path. Do not promise OnShape generate in a customer walkthrough unless that path is re-enabled and verified.