Choosing between CopperCAM and FlatCAM typically comes down to a trade-off between ease of use and cost. CopperCAM is widely considered more user-friendly and streamlined, while FlatCAM is a powerful, free, open-source alternative that has a steeper learning curve. Key Comparison: CopperCAM vs. FlatCAM
Here’s a technical guide comparing CopperCAM and FlatCAM for generating PCB isolation routing and G-code. Both are popular for DIY CNC PCB milling but differ significantly in workflow, features, and target users.
Part 4: Features Comparison Table
| Feature | CopperCAM | FlatCAM |
| :--- | :--- | :--- |
| Price | ~$80 (Free limited demo available) | Free (Open Source) |
| Platform | Windows only (Wine for Mac/Linux) | Native Windows, Mac, Linux |
| Isolation Type | Manual/Selection based | Automated Geometric |
| Multiple Passes | Yes (Manual offset) | Yes (Auto-contour) |
| Double-sided boards | Excellent (mirror view) | Good (requires manual flip) |
| Drilling (Excellon) | Very fast, customizable peck drilling | Good, but less peck drill control |
| Simulation | 3D Real-time (Best in class) | 2D Basic (Relies on external viewer) |
| Trace Width check | Yes (visual ruler tool) | No (requires external DRC) |
| Open Source | No | Yes |
Choose CopperCAM if:
- You are using a LPKF professional milling machine (CopperCAM is the OEM software).
- You need a quick 3D visualization to show clients.
- You are milling single-sided boards with wide through-hole components.
- You prefer a "WYSIWYG" manual selection process.
- You are running a Windows-only shop and don't mind paying $80.
The Ultimate Showdown: CopperCAM vs. FlatCAM for PCB Isolation Routing
If you have ever tried to manufacture a printed circuit board at home using a CNC router (such as a 3018 or Genmitsu), you quickly realize that your Gerber files are useless to a milling machine. You need a middleman: CAM software.
For the hobbyist and small-scale professional, two names dominate the conversation: CopperCAM (developed by Gilles at LPKF) and FlatCAM (developed by Carsten Presser). Both claim to do the same job: convert Gerber/Excellon files into G-code. However, they go about it in radically different ways.
Choosing the wrong software can lead to broken bits, short circuits, or hours of wasted time. In this deep dive, we will compare features, user interface, algorithm quality, cost, and workflow to help you decide which king of the engraver hill deserves a spot on your hard drive.
Part 3: The Algorithms (The "Make or Break" Feature)
This is where the war gets bloody.
CopperCAM vs FlatCAM — Quick Verdict
Both tools convert PCB designs into CNC/G-code, but they target different users: CopperCAM is polished and user-friendly for hobbyists and small shops; FlatCAM is powerful, flexible, and favored by tinkerers and advanced users who need scripting and automation.
7. Price & Licensing
- CopperCAM
- ~€70 for private license
- Trial version limits output lines (useless for real boards)
- FlatCAM
- Free (open source)
- No restrictions
Winner: FlatCAM
Detailed Comparison Table
| Feature | CopperCAM | FlatCAM (v8.994+) |
| :--- | :--- | :--- |
| Price | €55 (Paid) | Free (Open Source, GPL) |
| OS Support | Windows only | Windows, macOS, Linux |
| Development Status | Mature, closed source, paid updates | Active open source (new "Beta" versions) |
| Input Formats | Gerber (RS-274X), HPGL, DXF, Excellon drill | Gerber (RS-274X), Excellon drill, G-code |
| UI Complexity | Simple, classic Windows GUI | Modern, tabbed interface (Qt5) |
| Isolation Modes | Multi-pass, variable step-over, 45/90° | Single, multi-pass, offset, voronoi |
| Thermal Reliefs | Yes (automatic pads) | Basic (via geometry editing) |
| Engraving (non-PCB) | Yes (e.g., wood, brass plates) | No (strictly PCB-oriented) |
| G-code Flavor | Mach3, LinuxCNC, GRBL | Mach3, LinuxCNC, GRBL, Smoothie |
| Double-sided alignment | Yes (with manual fiducials) | Yes (with through-hole pads) |
Choose FlatCAM if:
- You are using an Open Source CNC (GRBL, Marlin, Duet).
- You are designing modern SMD boards (ESP32, STM32) with 0.5mm pitch components.
- You want to run Linux or macOS.
- You have a budget of zero dollars (open source).
- You like automated batch processing (FlatCAM can be scripted via Python console).
