6a2a57bdf4
* Sync WipeTower from BambuStudio(through ca1881761) * Fix post-slice self-invalidation on custom multi-extruder printers * Complete the rib wipe tower port in WipeTower2 The rib tower is now always square (prime_tower_width is ignored, as the GUI already implies), carries the rib origin offset like the BBL tower so the rib tips sit inside the configured position, clamps the rib length to the tower diagonal, and extends the ribs for short towers. * Use the squared rib tower size in arrange estimates estimate_wipe_tower_polygon reserved the arrange footprint and clamped the tower X position with the raw prime_tower_width, under-reserving space whenever the rib wall squares the tower to a different width. * Print the WipeTower2 shell with a non-support, non-soluble filament Like the BBL tower: the layer's sparse infill, wall, and brim go to the first toolchange to a non-support/non-soluble filament, or are printed with the incoming filament before any toolchange. The minimal-purge clamp now also covers toolchanges that get no finish-layer saving. Output is unchanged when no support/soluble filament is used. * Port the skip-points gap wall to WipeTower2 prime_tower_skip_points was stubbed for Type2 towers: the wall call hard-coded skip_points=false, the gap cutter received an empty vector, and append_tcr2 never routed the entry travel. Now the toolchange entry positions are precomputed from the finalized plan, the wall is cut open at each entry, and the entry travel approaches around the tower bounding box through the opening when it starts outside the tower. The geometry helpers are re-synced with the BBL versions (add_extra_point guards, per-point side selection). The cone wall keeps its separate path, where the option stays inert. Behavior change: non-BBL towers now honor the (default-on) checkbox with gap walls and routed entries; with the option off the output is unchanged, and the BBL tower path is untouched. * Route the in-place toolchange tower entry through the skip-point gap On multi-tool printers without ramming the tool changes away from the tower and the entry travel is the tcr's own positioning move, which went straight across the printed wall. Append the avoid-perimeter path to the change-filament gcode instead, so the head approaches around the tower and enters through the wall opening (append_tcr parity). * Iron the purge start out through the skip-point gap in WipeTower2 Port the BBL tower's entry line ironing: extrude the first 3 mm of the purge, retract, drag the nozzle 1.5x back out through the wall gap at F600, creep back at F240 and unretract, so the toolchange start blob ends up in the gap instead of on the wall. Fires only when the purge starts at the left-edge entry heading right (in-place toolchangers); SEMM ram/cooling wipes start mid-box and the priming line has no wall, so both keep their previous output. * Reserve WipeTower2 toolchange depth to match the printed purge The planner reserved ramming rows gated only on enable_filament_ramming and sized them with the SEMM 0.25s time step, while toolchange_Unload rams on (semm && enable_filament_ramming) || filament_multitool_ramming with the multitool time step. Disabling multitool ramming therefore left ~3 unprinted rows per toolchange as blank bands in the tower. Without ramming the first wipe line also needs reserved depth of its own (it no longer rides the last ramming row), plus the y_step/2 offset the wipe start inherits from the ramming start position - otherwise the tightened boxes truncate the ordered purge at the box edge. * Tile WipeTower2 purge rows contiguously across toolchange blocks Without ramming, each purge block reserved one wipe pitch more than its rows occupy (ceil+1 rounding plus the ram-geometry start offset), and the wipe began a full pitch inside the block, leaving a blank band of exactly two pitches between adjacent blocks. Plan the block as whole wipe rows, start the first row so the row lattice continues across the block boundary, and fill the reserved box instead of stopping at the ordered volume, mirroring how the BBL WipeTower keeps planned depth identical to printed rows. Ram-printing toolchanges (SEMM with ramming enabled, multitool ramming) are unchanged. * Scrub the WipeTower2 toolchange entry with the BBL flat-ironing spiral The entry scrub now matches the BBL tower's toolchange_wipe_new sequence: after the ironing drag the retracted nozzle runs a dry expanding-square spiral centred on the wall-gap entry point before resuming the purge row. The spiral runs whenever the gap wall is on (disable per filament via filament_tower_ironing_area = 0); WipeTower2 no longer reads prime_tower_flat_ironing. * Restart the WipeTower2 wipe at the box boundary after multitool ramming With the gap wall on a multi-tool printer, quantize the ram band up to its whole reserved rows (as the BBL tower does for the old-tool purge) and start CP TOOLCHANGE WIPE at the left-edge boundary on a fresh row below it instead of continuing from wherever the ram serpentine ended. The entry scrub then runs at the wall gap on ram toolchanges too, and the wipe box is whole rows, so it is filled completely like the no-ram case. SEMM and skip-points-off behavior is unchanged. * Move the WipeTower2 wall gap to the wipe start row for ram toolchanges * code cleanup * Potential fix for pull request finding Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> * fix typo --------- Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
OrcaSlicer: an open source Next-Gen Slicing Software for Precision 3D Prints.
Optimize your prints with ultra-fast slicing, intelligent support generation, and seamless printer compatibility—engineered for perfection.
Official links and community
Official Website:
Github Repository:
Follow us:
Join our Discord community:
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Main features
- Advanced Calibration Tools
Comprehensive suite: temperature towers, flow rate, retraction & more for optimal performance. - Precise Wall and Seam Control
Adjust outer wall spacing and apply scarf seams to enhance print accuracy. - Sandwich Mode and Polyholes Support
Use varied infill patterns and accurate hole shapes for improved clarity. - Overhang and Support Optimization
Modify geometry for printable overhangs with precise support placement. - Granular Controls and Customization
Fine-tune print speed, layer height, pressure, and temperature with precision. - Network Printer Support
Seamless integration with Klipper, PrusaLink, and OctoPrint for remote control. - Mouse Ear Brims & Adaptive Bed Mesh
Automatic brims and adaptive mesh calibration ensure consistent adhesion. - User-Friendly Interface
Intuitive drag-and-drop design with pre-made profiles for popular printers. - Open-Source & Community Driven
Regular updates fueled by continuous community contributions. - Wide Printer Compatibility
Supports a broad range of printers: Bambu Lab, Prusa, Creality, Voron, and more. - Additional features can be found in the change notes.
Wiki
The wiki aims to provide a detailed explanation of the slicer settings, including how to maximize their use and how to calibrate and set up your printer.
Download
Stable Release
📥 Download the Latest Stable Release
Visit our GitHub Releases page for the latest stable version of OrcaSlicer, recommended for most users.
Nightly Builds
🌙 Download the Latest Nightly Build
Explore the latest developments in OrcaSlicer with our nightly builds. Feedback on these versions is highly appreciated.
Belt Printer Builds
The nightly release ships two parallel builds: the standard build and a belt-printer build. Both are attached to the same release — tell them apart by the filename suffix:
- Standard — no suffix (e.g.
OrcaSlicer_Windows_Installer_x64_nightly.exe) - Belt —
_beltsuffix (e.g.OrcaSlicer_Windows_Installer_x64_nightly_belt.exe)
The _belt builds add experimental support for belt / conveyor (infinite-Z) printers, where the model is sliced against a tilted belt surface instead of a flat horizontal bed. They include ready-to-use belt printer profiles, the full belt slicing pipeline (mesh rotation and G-code transforms), belt-aware support generation, and a tilted-bed preview.
⚠️ Belt printer support is under active development and is not yet merged into
main— it currently ships only in these parallel_beltbuilds, produced from thebelt-printerbranch. See tracking PR #14394 and the original documentation in #12998.
How to install
Windows
Download the Windows Installer exe for your preferred version from the releases page. Both x64 and arm64 installers are published — pick the one matching your CPU.
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For convenience there is also a portable build available.
Troubleshooting
- If you have troubles to run the build, you might need to install following runtimes:
- MicrosoftEdgeWebView2RuntimeInstallerX64
- vcredist2019_x64
- Alternative Download Link Hosted by Microsoft
- This file may already be available on your computer if you've installed visual studio. Check the following location:
%VCINSTALLDIR%Redist\MSVC\v142
Microsoft Store
Install from the Microsoft Store when you prefer a Store-signed package (helps on Windows 11 Smart App Control).
Windows Package Manager
winget install --id=SoftFever.OrcaSlicer -e
Mac
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Download the universal DMG, which runs on both Apple Silicon and Intel Macs.
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Drag OrcaSlicer.app to Application folder.
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If you want to run a build from a PR, you also need to follow the instructions below:
Quarantine
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Option 1 (You only need to do this once. After that the app can be opened normally.):
- Step 1: Hold cmd and right click the app, from the context menu choose Open.
- Step 2: A warning window will pop up, click Open
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Option 2: Execute this command in terminal:
xattr -dr com.apple.quarantine /Applications/OrcaSlicer.app -
Option 3:
- Step 1: open the app, a warning window will pop up
- Step 2: in
System Settings->Privacy & Security, clickOpen Anyway:
- Step 1: open the app, a warning window will pop up
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Homebrew Cask
brew install --cask orcaslicer
The Homebrew cask installs the official macOS DMG from GitHub Releases.
Linux
Flathub (Recommended)
OrcaSlicer is available through FlatHub:
Install from the command line:
flatpak install flathub com.orcaslicer.OrcaSlicer
flatpak run com.orcaslicer.OrcaSlicer
It can also be installed through graphical software managers (KDE Discover, GNOME Software, etc.) when Flathub is enabled. Search for OrcaSlicer in your software center.
AppImage
AppImages are published for both x86_64 and aarch64 (ARM64). Pick the file matching your CPU — the ARM64 build has aarch64 in its name (e.g. OrcaSlicer_Linux_AppImage_Ubuntu2404_aarch64_*.AppImage).
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Download App image from the releases page.
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Double click the downloaded file to run it.
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If you run into trouble executing it, try this command in the terminal:
chmod +x /path_to_appimage/OrcaSlicer_Linux.AppImage
How to Compile
All updated build instructions for Windows, macOS, and Linux are now available on the official OrcaSlicer Wiki - How to build page.
Please refer to the wiki to ensure you're following the latest and most accurate steps for your platform.
Klipper Note
If you're running Klipper, it's recommended to add the following configuration to your printer.cfg file.
# Enable object exclusion
[exclude_object]
# Enable arcs support
[gcode_arcs]
resolution: 0.1
Supports
OrcaSlicer is an open-source project, and we're deeply grateful to all our sponsors and backers.
Their generous support helps fund filaments and other essential 3D printing materials for the project.
Thank you! :)
Sponsors
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Backers:
Ko-fi supporters ☕: Backers list
Support the project
Some Background
Open-source slicing has always been built on a tradition of collaboration and attribution. Slic3r, created by Alessandro Ranellucci and the RepRap community, laid the foundation. PrusaSlicer by Prusa Research built on Slic3r and acknowledged that heritage. Bambu Studio in turn forked from PrusaSlicer, and SuperSlicer by @supermerill extended PrusaSlicer with community-driven enhancements. Each project carried the work of its predecessors forward, crediting those who came before.
OrcaSlicer began in that same spirit, drawing from BambuStudio, PrusaSlicer, and ideas inspired by CuraSlicer and SuperSlicer. But it has since grown far beyond its origins. Through relentless innovation — introducing advanced calibration tools, precise wall and seam control, tree supports, adaptive slicing, and hundreds of other features — OrcaSlicer has become the most widely used and actively developed open-source slicer in the 3D printing community. Many of its innovations have been adopted by other slicers, making it a driving force for the entire industry.
The OrcaSlicer logo was designed by community member Justin Levine.
License
- OrcaSlicer is licensed under the GNU Affero General Public License, version 3.
- The GNU Affero General Public License, version 3 ensures that if you use any part of this software in any way (even behind a web server), your software must be released under the same license.
- OrcaSlicer includes a pressure advance calibration pattern test adapted from Andrew Ellis' generator, which is licensed under GNU General Public License, version 3. Ellis' generator is itself adapted from a generator developed by Sineos for Marlin, which is licensed under GNU General Public License, version 3.
- The Bambu networking plugin is based on non-free libraries from BambuLab. It is optional to the OrcaSlicer and provides extended functionalities for Bambulab printer users.