Klipper is a 3D-printer firmware that separates motion control logic from low-level hardware operations by running on a host computer while communicating with microcontroller boards on the printer itself.
The firmware addresses the computational constraints of running complex motion algorithms directly on printer microcontrollers. Klipper moves the intensive calculations—trajectory planning, pressure advance compensation, and input shaping—to a host machine running Linux, while the microcontroller handles only real-time step generation and sensor reading. This split architecture allows printers to achieve higher performance and more sophisticated motion control than traditional single-board firmware approaches, since the host can dedicate more processing power to these calculations without the timing constraints that plague microcontroller-based solutions.
Klipper suits users who want to extract maximum print quality and speed from their hardware and are comfortable running a separate host computer. It works with a wide range of printer types and microcontroller boards, making it adaptable to both stock machines and custom builds. The approach is particularly valuable for users seeking advanced features like resonance compensation and precise pressure advance tuning, which benefit from the host's computational headroom. Those running simple printers with minimal customization needs, or those preferring a self-contained printer without external dependencies, may find the added complexity unnecessary.
Development on the project shows consistent activity across multiple areas. The codebase receives regular updates to core functionality and new microcontroller support. The project maintains active engagement with user-reported issues and pull requests. Documentation is regularly refined and expanded to cover new features and use cases. The maintainers respond to community contributions and incorporate improvements across the firmware's various subsystems.
