Precision filament cutter
The project integrates an Olfa Japan blade system for controlled filament cutting. Final cutter fasteners remain under validation.
Public project reveal
NebulaTor
A CN3D-designed upgrade for the BIQU/BTT Nebula Extruder, developed around improved filament handling, sensing, serviceability, and an integrated cutter system.
Files coming soon: documentation is public now, STL files are planned next, and CAD/STEP files will follow only after final validation.
Public documentation liveBIQU / BTT Nebula ExtruderSTL coming soonCAD after validation
Docs livePublic project reveal and documentation
STL nextPrintable files planned after validation
CAD laterCAD/STEP planned after final validation
KlipperDevelopment firmware logic documented
What NebulaTor Is
NebulaTor is a CN3D-designed upgrade for the BIQU/BTT Nebula Extruder. It keeps the Nebula Extruder foundation and focuses the redesign on real service problems: filament handling, sensing, troubleshooting access, and cutting control.
Key Improvements
Added filament sensing
The original sensor before the gears remains, and NebulaTor adds sensing after the gears so the filament path can be understood more clearly.
Improved handling
The idler door was redesigned to make filament handling and service access easier than the stock arrangement.
Serviceability
The design exposes more of the working path and gives builders clearer checks for troubleshooting movement, preload, and sensing.
Internal mechanism
The project includes internal mechanical changes around the drive path, idler, cutter, and gear area.
Gear meshing update
The latest local CAD revision improved gear meshing between the two gears; the CAD itself is not public yet.
Electronics integration
Repository material references a new PCB with support for the added sensing path. Final PCB release status is still pending.
Engineering Visual
The exploded view shows the project as a complete extruder upgrade rather than a cosmetic shell: body, lever, gears, PCB, motor area, front cover, inserts, and fasteners all work around the filament path.
Documentation Shortcuts
Use the hub pages below to review the current public documentation. Pages marked as previews will be completed as the staged release moves toward STL publication.
BO
BOM
Current NebulaTor BOM preview with confirmed hardware, pending cutter fastener confirmation, and release-stage notes.
PrPrint Settings
Recommended NebulaTor print settings, ABS material guidance, tested Polymaker materials, and affiliate disclosure.
AsAssembly
Current NebulaTor assembly preview based on the project manual, with verified sequence, checks, and release-status notes.
FiFirmware
NebulaTor firmware overview covering Klipper macros, sensor logic, adaptation requirements, and validation status.
HoHow It Works
How NebulaTor handles filament movement, sensing, cutter behavior, gears, electronics, and prototype video context.
StStory Behind
The factual story behind NebulaTor, from CN3D testing the Nebula Extruder to public documentation and staged releases.
DoDownloads
NebulaTor release status for public documentation, planned STL files, validated BOM, firmware package, and future CAD release.
Development Status
Concept and initial redesign
CN3D tested the original Nebula Extruder and began exploring practical upgrades.
CompleteMechanical development
The redesign covers handling, sensing, cutter integration, and internal mechanism work.
AdvancedAlpha testing
The public project video shows the prototype operating during development.
Completed / activePublic documentation
The documentation hub is public while the final project files continue through validation.
LiveFinal validation
BOM details, files, firmware, and image freshness still need final confirmation.
In progressSTL release
Printable files are planned after validation.
UpcomingCAD release
Editable CAD/STEP files are planned after final validation.
Planned laterContinue Through the Hub
Start with How It Works for the technical path, read the Story Behind for project context, or check Downloads for the staged release plan.