Key Takeaway: Creating a working SolidWorks CAM post processor for LinuxCNC lathe operations requires understanding both CAMWorks post engine syntax and LinuxCNC’s G-code requirements. This guide covers the complete workflow from post processor setup through G76 thread cutting cycles. Download the ready-to-use LinuxCNC Turn post processor below.
📖 Table of Contents
Introduction
If you are a DIY CNC enthusiast using SolidWorks CAM (CAMWorks) and LinuxCNC for lathe operations, you know the frustration of finding a working post processor. While SolidWorks CAM includes generic post processors, none support the specific syntax that LinuxCNC requires for turning operations — especially thread cutting with G76 cycles.
This guide walks through setting up and customizing a SolidWorks CAM post processor for LinuxCNC lathe control, including the critical G76 threading parameters.
Download the LinuxCNC Turn Post Processor
Ready to use — no modifications needed for standard LinuxCNC lathe setups. Includes CAMWorks post source file (.pst) and compiled post processor.
LinuxCNC Turn Post Processor
SolidWorks CAM post processor for LinuxCNC lathe operations. Supports G76 threading, tool nose radius compensation, and standard turning cycles.
Installation Guide
- Download the LinuxCNC Turn post processor package using the button above
- Extract the .zip file to a folder on your computer
- Copy the files to CAMWorks > Define Machine > Post Processor > Browse > Post > Turn
- Restart SolidWorks CAM and select the LinuxCNC Turn post from the dropdown menu in your CAM operation
What Makes LinuxCNC Lathe Post Processors Different
LinuxCNC uses a different G-code dialect than Fanuc or Haas controllers. Key differences include: different G76 threading cycle syntax, tool nose radius compensation requirements, and specific feed rate mode expectations. A generic post processor will produce code that either fails to run or, worse, could cause crashes.
G76 Threading Support
One of the most requested features is proper G76 thread cutting support. The post processor includes full G76 cycle generation with the following user-configurable parameters:
- Depth of cut per pass (controlled via CAMWorks thread operation settings)
- Finish pass allowance (for clean final threads)
- Thread angle adjustment (typically 60 degrees for standard metric threads)
- Chamfer (pull-out) distance for thread runout
Troubleshooting Common Issues
Problem: Generated code shows arc errors. LinuxCNC requires IJK or R format for arcs. Ensure your post processor setting matches your LinuxCNC configuration (look for ARCTYPE in the post file).
Problem: Tool not moving to correct position. Check that your tool numbering in SolidWorks CAM matches your LinuxCNC tool table. LinuxCNC uses tool numbers from its .tooltable file, not the CAM assignment.
Problem: G76 cycle not running. Verify that LinuxCNC is configured to support canonical threading. Add `# canonical` to your LinuxCNC INI file if threading support is not enabled.
Frequently Asked Questions
Which SolidWorks CAM version is supported?
Tested with SolidWorks CAM 2020 through 2024 (CAMWorks-based). Should work with later versions as well since the post format has been stable.
Can I modify the post processor for my specific machine?
Yes. Open the .pst file with CAMWorks Universal Post Generator. You can customize feed rate defaults, arc output modes, coolant commands, and safety lines.
Related Reading
- GRBL Post Processor for SolidWorks CAM
- LinuxCNC Raspberry Pi 4B Double Step Guide
- SolidWorks CAM Post Processors for HAAS, Siemens & FANUC
External Resources
Sources: LinuxCNC Documentation, CAMWorks Post Generator Guide, Community Testing
