Slicer-2 is an open‑source toolpath planning and slicing framework developed at Oak Ridge National Laboratory (ORNL) for additive manufacturing processes. It provides advanced algorithms for generating efficient, reliable toolpaths for technologies such as Fused Deposition Modeling (FDM) and Directed Energy Deposition (DED), with an emphasis on print quality, process optimization, and extensibility.

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Core capabilities include:

• Multi‑process toolpath generation (FDM, DED, and research workflows)
• Advanced slicing and geometric processing algorithms
• Path optimization and modification utilities
• Configurable templates and settings system (templates/, resources/configs/)
• Extensible architecture for new algorithms and exporters
• Developer documentation via Doxygen & wiki

• Report bugs or request enhancements: Issues
• View historical releases: Releases
• Follow contribution guidelines: Contributing

Before opening a new issue, please search existing ones to avoid duplicates.

Slicer-2 includes a comprehensive User Guide. This guide details the operation of Slicer-2 as well as explanations of every setting and its impact on the slicing process. The user guide also describes the command line mode and includes examples.

• Developer onboarding: Getting Started
• Configuration examples: see the .s2c templates in templates/

See LICENSE.md for core license terms. Third‑party library licenses and citation guidance are documented in the wiki:

• License & Library Licenses
• Citation & Copyright Information

This work has been sponsored by work supported by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Office of Advanced Manufacturing, under contract number DE-AC05-00OR22725.

Development has benefited from numerous research partners and many interns whose efforts helped Slicer-2 reach its current state. Thanks to all contributors—past and present.

General inquiries: [email protected]

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