Updated: October 2026
Every CNC job is twice-designed, and the casualties pile up in the middle: the customer sends a JPG, the designer makes a DXF, the machine eats G-code, and somewhere between the three the letters shrink or the jali loses a bridge. This guide untangles the chain – which format lives at which stage, which software does what, and the workflow that stops file disasters before they bill you. All figures are estimates (est.).
The Three File Worlds of a CNC Job
| Stage | Format | Who makes it | Accepted by |
|---|---|---|---|
| Customer artwork | JPG, PNG, PDF – usually messy | customer, their printer | nothing directly – must be redrawn |
| Vector design | DXF, SVG, AI, CDR | designer | CAM software |
| Machine toolpath | G-code, NCC, TAP | CAM at the machine PC | the CNC controller |
DXF, SVG and Friends – Vector Files
- DXF: the workhorse of Indian CNC – every CAD and CAM tool imports it. Demand DXF R14 or 2000 versions; newer DXF dialects break older CAM imports.
- SVG: cleaner for design-for-sale marketplaces and web tools; most modern CAM reads it directly.
- AI and CDR: native to designers’ tools – always export-clean to DXF before machine work; native files carry fonts and linked images that vanish at the shop.
- Golden rule: no JPG straight to machine – a traced JPG makes wavy lines of thousands of nodes; professional shops redraw, not trace.
G-Code and Controller Dialects
| Controller family | File it eats | Notes |
|---|---|---|
| RichAuto A11 class | G-code, .PLT and UOO variants | the Indian 1325 standard |
| NC-Studio | .nc / .NCC G-code | common in furniture machines |
| Mach3 / Mach4 | .tap G-code | standard in retrofits and hobby-to-pro machines |
G-code IS the instruction set: feed rates, spindle RPM, paths and tool changes in plain text. The same DXF yields different G-code per controller dialect – never run a file compiled for one controller on another without checking units and headers.
Design and CAM Software Map (est.)
| Software | Best at | License cost (est.) |
|---|---|---|
| ArtCAM | 2.5D relief, door and carving work | legacy copies circulate; successor Carveco Rs 40,000+ per year |
| Vectric VCarve or Aspire | signage, jali, 3D carving – most popular pro CAM | Rs 65,000-1,80,000 one-time |
| Fusion 360 | mechanical parts and parametric design | free hobby tier, paid for business |
| Inkscape plus free CAM | lean starter chain for vector work | free |
The 6-Step File Workflow That Stops Disasters
- 1. Take artwork ANY format, but quote drawing time separately – customers never pay for cleanup unless told.
- 2. Redraw to clean DXF: 1:1 real-world units in mm, no duplicate lines, all shapes closed for pockets.
- 3. Confirm dimensions on WhatsApp with a dimension-marked screenshot before CAM – free fix stage.
- 4. CAM: set bit, feeds, passes, toolpath preview for oddball lines – simulate before save.
- 5. Air-cut above the spoilboard with spindle off: watch the whole path once, cheap rehearsal.
- 6. Label G-code files as job-spec: material-thickness-bit – next repeat order starts in seconds.
Our Verdict
Files are the free profit leak of CNC shops: charge for redraws, standardize DXF-in-G-code-out, simulate every path once, and your machine hours stop dying on other people’s JPGs. See the file discipline inside a working plant’s rates in the Rs 2.5 Cr signage factory case study, browse CNC routers, and plan tooling with the all-India printing business startup guide.
FAQs – CNC Router File Formats: DXF, G-Code, ArtCAM 2026
Which file format does a CNC router use?
The machine itself reads G-code (.nc, .tap or controller variants). You design in DXF or SVG and CAM software converts them to G-code for YOUR controller. Customers supply artwork in any format – JPGs must be redrawn into vectors first.
Can I use JPG or PNG directly on a CNC router?
Not for quality work. Images must be traced or preferably redrawn into clean DXF or SVG vectors; auto-traced images create thousands of jagged nodes that make rough edges and slow cuts. Budget redraw time in the quote.
Is ArtCAM still available for CNC work?
Original ArtCAM is discontinued – businesses have moved to Carveco (its successor), Vectric VCarve or Aspire. Legacy copies still run widely in Indian shops; what matters is clean DXF output and a post-processor matched to your controller.
Which software should a beginner learn for CNC design?
Start with the free chain: Inkscape for vector cleanup plus a free CAM for toolpath, learn shapes and toolpaths. When orders justify, move to VCarve or Aspire – their jali and relief libraries pay back fast (est. Rs 65,000+ one-time).
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