The CAD to CNC chain
CAD model → CAM toolpaths → post-processor → G-code
→ DNC / network transfer → CNC controller → machined part
→ inspection / machine data → feedback to engineeringEach arrow is a potential manual step: exporting files, copying programs to USB sticks, editing G-code at the machine or typing results into spreadsheets.
Integration points
| Link | Integration |
|---|---|
| CAD → CAM | Associative or automated programming from released models |
| CAM → G-code | Machine-specific post-processors, no manual edits |
| G-code → machine | DNC or network transfer linked to work orders and revisions |
| Tool data | Shared tool library between CAM, presetter and machines |
| Machine → engineering | Cycle times, alarms and measurement results fed back |
2D cutting: laser, plasma, waterjet and routers
For profile cutting, the chain is CAD → DXF → nesting → cutting program. Automation exports clean DXFs from CAD, sends them to nesting software with quantities from ERP and returns sheet usage and cutting times.
Revision control at the machine
One of the most valuable results of integration is that the machine runs the program for the correct revision. Program names and headers carry part number and revision, and DNC systems only serve released programs.
(PART: 100-2302 REV: C PROGRAM: O2302)
(POSTED: 2026-07-23 MACHINE: HAAS VF-2)
G90 G17 G40 G80 G21
...Benefits
- No outdated programs on machines.
- Faster set-up and less manual editing.
- Accurate data for costing and planning.
- Closed-loop improvement from real machining data.
A digital thread from CAD to CNC turns design changes into machined parts without surprises.
CAD–CNC integration with ENGIMANDI
See CNC post processor development, CAD ↔ CAM integration and CAD automation for CNC manufacturing.