This is an independent, community-maintained fork of OrcaSlicer — not the official project, and not affiliated with Bambu Lab.
Open-source · FDM / FFF

Slicing built for people who tune before they print.

A community-driven fork of Bambu Studio's lineage, rebuilt around calibration, control, and speed. Every parameter is exposed, every printer is welcome, and every build is shaped by the people who actually run it.

GPLv3 licensed 100% open source Nightly dev builds
TOOLPATH_PREVIEW.GCODE
LAYER 042 / 260
SPEED 140mm/s FLOW 98.2% TEMP 220°C

What's under the hood

Every tool below exists because someone in the community needed it — then upstreamed it for everyone else.

PARAM_01CORE

Fast slicing, real G-code

A slicing core built for speed — models resolve into clean, print-ready G-code without the wait, even on dense multi-part plates.

PARAM_02TUNING

Calibration, taken seriously

Flow, pressure advance, temperature towers, and retraction tests are built in — dial in a new filament in minutes, not evenings.

PARAM_03GEOMETRY

Support that thinks ahead

Support generation reads the model's geometry, not just its bounding box — less material, fewer scars, cleaner overhangs.

PARAM_04HARDWARE

Printer-agnostic by design

Profiles span the ecosystem, not one vendor's lineup — bring a Cartesian, CoreXY, or bedslinger and it'll speak your machine's language.

PARAM_05CONTROL

Settings that go deeper

Nothing hidden behind a "basic mode." Every parameter that shapes a print is exposed, documented, and safe to change.

PARAM_06SOURCE

Built in the open

Every change ships as a public commit. Roadmap, issues, and nightly builds are one click away — the project is what its users make it.

Calibration as a first-class citizen

Most slicers bolt calibration on as an afterthought. Here it's the default workflow — because a print is only as good as the numbers behind it.

Flow & temp towers, generated on demand

Pick a filament, set a range, and get a print-ready test plate — flow ratio, pressure advance, retraction, and temperature, all in one pass.

190°
200°
210°
220°
230°
240°

Compatibility that doesn't play favorites

Printer profiles for the machines people actually own — from enclosed CoreXY boxes to open-frame classics.

CoreXY
Cartesian
Bedslinger
Delta
IDEX
Direct Drive
Bowden
Klipper
Marlin
RepRapFirmware
Multi-Material
Custom Profiles

Shaped by the people who use it

This fork moves the way good open-source tools move: fast, public, and answerable to the people running it on real hardware. Issues get triaged in the open. Features get argued about in the open. Nightly builds ship so the community can break things before a release does.

If you've got a printer that's fighting you, a workflow that's missing a knob, or a calibration test the core doesn't cover yet — that's exactly the kind of contribution this project is built to absorb.

Nightly
Build cadence
GPLv3
License
Public
Roadmap
recent commits
#a13f9calib: add multi-tower flow test plate
#7c02esupport: reduce contact density on organic supports
#e9412profile: add CoreXY 350mm bed presets
#118bdcore: speed up arachne perimeter pass
#5f0aadocs: rewrite pressure advance guide
#d302cui: expose retraction per-filament overrides