- Improvements
- Lower the print bed when a tool is unknown or lost, allowing the user to safely remove the print.
- During Dock Calibration, users can now choose between Keep, Calibrate, and Invalidate.
- Added an flag to skip temperature stabilization.
- Fixes
- Fixed spontaneous INDX Head resets.
- Fixed incorrect tool assignment after a REDSCREEN reset. The printer now saves the currently selected tool.
- Removed the extruder filament sensor from the footer and the Sensor Info menu.
Version 6.6.1
02.07.2026
Version 6.6.0
25.06.2026
Summary
- New features and improvements
- First firmware release for the Prusa CORE One/+ INDX
- Full INDX toolchanger support, with automatic tool changes for up to 8 tools
- Contactless nozzle induction heating
- Continuous nozzle presence detection for safety and fault detection
- Contactless tool offset sensor
- Guided INDX calibrations: docks, tool offsets, nozzle cleaner, and more
- Automatic, low-waste nozzle cleaning with a wastebin
- Screen for unloading or changing all filaments at once
- Reworked tool mapping screen supporting up to 8 tools
- Empty Nozzle Cleaner
- Known issues
- Pick / park failures
- Parking in an occupied dock
- Single-tool auto-load
- Flexible materials
- Special materials
- Spontaneous INDX Head resets
- Phase Stepping & Input Shaper calibrations
- Filament stuck detection