CAD/CAM & Post-Processing
The CAD/CAM pipeline is the process by which a part design in a CAD model becomes machine-ready G-code that drives the spindle, axes, and tool changer of a production CNC machine. Every step in that pipeline introduces opportunities for the final program to differ from the designer's intent — a CAM toolpath that selects inefficient entry moves, a post-processor that emits the wrong M-code for the controller family, a simulation that doesn't catch a collision in an asymmetric fixture. For single-part prototyping, catching these problems on the shop floor is acceptable. For production runs, cycle time lost to re-programming and re-setup is cost that should have been eliminated upstream. This category covers the three stages where upstream discipline matters most.
The three articles here are ordered by stage of the pipeline rather than by depth. The CAD/CAM workflow article covers the high-level process from model import through toolpath generation — the decisions a programmer makes that determine whether the resulting G-code is efficient, safe, and repeatable. The post-processor article addresses the translation from neutral toolpath data to controller-specific G-code, where a misconfigured post produces code that runs but behaves subtly wrong on the machine. The simulation article covers the verification step that catches errors before they damage tooling, workpieces, or the machine itself.
UTEC Industrial's machining operations use CAM software to program all production work on the CNC lathes, milling centers, boring mills, and plasma cutting equipment, with toolpaths verified in simulation before any program is released to the floor. The shop floor operators work from verified programs; they do not make unverified program edits during production runs.
Articles in this category
- CAD/CAM Workflow for CNC Machining: From Model to Finished Part — The end-to-end pipeline from engineering CAD model import through CAM programming to post-processed G-code, including toolpath strategy selection, stock definition, tool library management, and handoff to the machine.
- Post-Processor Configuration: Generating Machine-Ready Code from CAM — How CAM software is configured to emit G-code compatible with specific controller families (Fanuc, Siemens, Mazatrol), the parameters that require tuning for each machine, and the diagnostic approach when a new post produces unexpected machine behavior.
- Toolpath Simulation and Verification: Catching Errors Before Cutting Metal — Machine-level toolpath simulation, collision detection with fixtures and tombstones, stock removal visualization, and the first-article dry-run practices that catch the errors simulation alone cannot.
How to use this category
If you are planning a new CAM implementation or evaluating workflow improvements, the workflow article covers the decisions and their cost/benefit trade-offs. If you are commissioning a new CNC machine or upgrading a controller, the post-processor article addresses what a good post-processor integration looks like and what warning signs indicate a misconfigured post. The simulation article is the everyday discipline for any production shop running CAM-programmed work — it pays for itself the first time it catches a collision before metal is cut.
Information in this library is provided for general reference only. Verify post-processor configuration, G-code syntax, and simulation coverage against your specific CAM software, controller documentation, and machine operator manual before applying to production.