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The NebulaOS manual

NebulaOS is open firmware for the Creality Ender-3 V3 KE: guided printing on its own touchscreen app, with full Klipper control underneath. This manual describes NebulaOS 1.0.1.

New here? Start printing

Seven short steps, in order. Each one ends with a link to the next.

1. What is NebulaOS - what it replaces, safety, and what you need
2. Install NebulaOS - from stock Creality firmware or from OpenKE
3. First start - Wi-Fi, the printer's address, Mainsail
4. First calibration - one guided run, about 7 minutes
5. Set up your slicer - two lines of start and end G-code, do not skip this
6. Your first print - load filament, print a test, tune the first layer live
7. Keeping NebulaOS updated

Install → Connect → Calibrate → Slice → Print.

Improve my prints

• Improve your prints - start from what you see: first layer too high or too low, poor adhesion, an uneven bed, a Z offset that drifts
• Calibration explained - bed tramming, Z offset and bed mesh, load cell, axis twist, PID, input shaper, E-steps, skew, TMC autotune
• Print setup NebulaOS adds - adaptive mesh, purge line, bed soak, firmware retraction

Customize NebulaOS

• SSH, SFTP and security - logging in, the root password
• Mainsail and Moonraker - the web interface, slicer upload, apps, home automation
• Custom macros and integrations - your own macros, Spoolman, RUN_SHELL_COMMAND
• Files, configuration and backups - printer.cfg, what an update keeps, how to back up
• How NebulaOS works

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Supported: the Ender-3 V3 KE only - not the Ender-3 V3, V3 SE or V3 Plus.

• Using NebulaScreen - every tab, button and setting on the printer's screen, in the screen's own order.
• Help and recovery - start from the symptom. Going back to stock, Resetting, Recovery.

NebulaOS is not Creality's software and is not supported by Creality. If a page tells you to do something and you cannot find the button it names, that is a bug in this manual - please report it: github.com/NebulaOS-KE/NebulaOS/issues.