Ultimaker Cura 5.9.1 / 5.10.0 Alpha 0

The About Page now shows some of the used sources, their licenses, and their versions in a clearer way. This will be even more complete in Cura 5.10.

New features and improvements:
Scarf seam settings:
New settings have been added in experimental that let you turn your Z seam into a scarf seam.
Scarf Seam Length Determines the length of the scarf seam, a seam type that should make the Z seam less visible.
Scarf Seam Start Height The ratio of the selected layer height after which the scarf seam will begin.
Scarf Seam Split Distance Determines the length of each step in the flow change when extruding along the scarf seam. A smaller distance will result in a more precise but also more complex G-code.
Outer Wall Start Speed Ratio This is the ratio of the top speed to start with when printing an outer wall.
Outer Wall (start) Acceleration This is the acceleration with which to reach the top speed when printing an outer wall
Outer Wall End Speed Ratio This is the ratio of the top speed to end with when printing an outer wall.
Outer Wall (end) Deceleration This is the deceleration with which to end printing an outer wall.
Outer Wall Speed Split Distance This is the maximum length of an extrusion path when splitting a longer path to apply the outer wall acceleration/deceleration. A smaller distance will create a more precise but also more verbose G-Code
Updated the Start and End G-code:
It is now possible to include conditional statements such as If/Else statements when editing the start and end G-code in your machine settings. This allows you to set up much more complex printer automation that responds to things such as the status of your printer or user input. Learn more about the possibilities on our wiki.
Added the "Extra Infill Lines to Support Skins:
And other improvements to help make printing over sparse infill more reliable, contributed by @Hello1024
More Improvements:
Introduced Build Fan Speed at Height, Build Fan Speed at Layer, and Build Volume Fan Number to control extra fans, like those controlling the build volume separately
Significant UI speed improvements interacting with custom settings especially if your printer has multiple extruders
Introduced an Anycolor option for the UltiMaker S and F series enabling you to print with any UltiMaker color loaded in the material station that is compatible with the printjobs. Note that it’s only compatible with the latest version of the firmware (for Factor 4 >=10.1 and for S-series >=9.0, and it does not include the UltiMaker S3)
Added an option to Export Package for Technical Support to the help menu, it includes a project file with the settings but also the logs
Improved the way materials are selected when using multiple extruders to print the build plate adhesion so it doesn't default to the first extruder but the best option instead.
Improved processes so not only installers but also executables inside installers are signed for Windows
Introduced improvements to how models and projects with large file size (500MB) slice. A message was also added to inform the user when a file size is too big to slice.
Made it possible for multiple Engine plugins that are registered to the same slot to be used together. (Only for Modify plugins, and Plugins will be addressed alphabetically)
Moved the Gradual Flow Engine Plug-in to CuraEngine, this also resolved slicing crashes when the plugin was used in combination with large number of smaller models that were printed at once.
Improved and expanded the Insert at Layer Change post-processing script, contributed by @GregValiant
Improved and expanded the Time Lapse Post Processing script, contributed by @GregValiant
Added a registry entry to provide the option to silent uninstall on Windows, contributed by @Rotzbua
Bug fixes:
Fixed a crash that would occur when renaming profile names that would result in changing the order of the profiles, resolves #19522
Fixed a bug so objects in a 3MF reload in the same position as they were saved again, contributed by @nilsiism
Fixed an issue where overhanging walls and walls that were adjacent to overhanging walls were not printed at the correct speed
Fixed a bug that prevented the "Sync materials with printers" page from displaying when accessed immediately after starting Cura or signing in
Fixed a bug where reloading an updated model would not update the duplicates of the model on the build plate, resolves #19031
Fixed a bug that showed incompatible materials when switching between printers with a different filament diameter.
Fixed a bug where tree support in enclosed holes has missing layers
Made improvements in the G-codePathModify slot for Engine Plugins, contributed by @ThomasRahm
Fixed a bug that prevented changes to the initial layer diameter from being applied properly in tree support, contributed by @ThomasRahm
Fixed a rounding issue in the engine math, @0x5844
Bugs resolved since the Beta release:
Spiralize outer contour no longer adds unnecessary seams to the model, resolves #19814
When coasting is enabled the printhead no longer drops down, resolves #19810
Fixed coasting strategy so it's only applied to outer/inner walls, and not to skin, top-bottom, or infill
Fixed wiping direction when printing a single wall, resolves #19843
Improved wiping in combination with the scarf seam, resolves #19860
Significantly improved the strategy for sharpest corner - smart hiding seam location combination
Fixed a bug where long scarf seam length and short scarf seam steps would result in the seam being moved outward
Fixed a bug where seam acceleration and deceleration around seam were not working
Fixed a bug where infill was wrongly removed from narrow spaces, resolves #19478
Triple-clicking values and searches that you entered now has you select everything so you can edit it in the field similar to other desktop applications
Updated dependencies and improved how unwanted and unused binaries are excluded from the building process.
Added Eazao material for the new Eazao printers
Updated the urls schemes to make them more robust when attempting to open files in Cura
Retract before outer wall now works correctly on all layers, resolves #19876
Resolved top reported crashes coming in via the analyzing tool Sentry
Removed an unwanted Z-hop when starting a new layer
Layer starts are more visible in the print preview with the scarf seam
Made the X to close floating and pop up windows a little bigger
Improved the visuals of printers with a build plate texture, they now render more consistently regardless of zoom or angle of view
The UI now displays correctly on Wayland, with this fix we noticed some performance drop compared to X11
Introduced Makerbot Sketch Sprint:
The new lightning-fast MakerBot Sketch Sprint has been released and is now supported inside of Cura.
Learn more about our fastest classroom printer; MakerBot Sketch Sprint
Note: We are very happy with the performance of the Sketch Sprint profiles. However, the Sprint prints so fast that some users have experienced issues with overhangs that do not print as cleanly as they would like. If you find this yourself, you can increase the 'Minimum Layer Time' setting to give the overhangs more time to cool. If the issue persists then use supports to support any overhangs that are giving you trouble. We are always making improvements to our printer profiles and we expect that overhangs will only get better over time!
More Printers and Profiles:
Introduced Makerbot Sketch and Sketch Large
Introduced new materials to the UltiMaker Method series, ABS, PETG, Nylon-CF, and Tough PLA
Introduced new materials for Labs Extruder of the UltiMaker Method series, BASF Ultrafuse 316L, TPE SEBS 1300 95A, and Polymax PC. Except BASF Ultrafuse 316L is not available on the Method XL.
Various setting improvements for ABS and Nylon for UltiMaker Method series
Various setting improvements for dual extrusion support for the UltiMaker Method series
Implemented a hard limit so the bed temperature cannot be more than 120°C on all UltiMaker printers.
Fixed an error in the profile Ultimaker 2 profile naming
Introduced the Creality CR-M4, contributed by @kixell
Introduced Eazao M500, M600, M700, and Potter, and updated the Eazao Zero, contributed by @Eazo
Introduced ZYYX+ and ZYYX Pro, contributed by @theodorhansson
Updated acceleration settings for the Creality Ender-2 V3 SE, contributed by @T9Air
Community Translations:
Updated Japanese translations by @h1data
Brazilian Portuguese by @Patola

New features and improvements:
Introduced the MethodX and MethodXL printers with it's materials and the option to write to .makerbot
A year after the merger of Ultimaker and MakerBot, we have unlocked the ability for users of our Method series printers to slice files using UltiMaker Cura. As of this release, users can find profiles for our Method X and Method XL printers, as well as material profiles for ABS-R, ABS-CF, and RapidRinse
Prime tower base settings increase the stability of large prime towers:
New settings have been released that let you modify the base of your prime tower.
The new settings are:
Prime Tower Base Size
Prime Tower Base Height
Prime Tower Base Slope
Prime Tower Raft Line Spacing
You can modify these settings to help improve the reliability of your prime towers. You can also use them to calibrate how well your prime tower adheres to the build plate for increased print success, or to avoid over-adhesion that may damage your build plate.
The Start and End gcodes now accept variables and math including the variables:
Cura can now accept more start and end gcodes that include math, for example:
G0 X{prime_tower_position_x - prime_tower_size/2} Y{prime_tower_position_y-prime_tower_size/2} F6000
M109 S{material_final_print_temperature}
This hopefully also solves issues like #14111 (comment) and #16012 (comment)
Other Improvements:
Introduced the setting for Raft Line Spacing, but for the prime tower
Updated the Support Z Distance to allow for more different values, no longer only multiple layerheights, solves #6105
Bug Fixes:
Fixed a crash for some Linux users when trying to open the file menu
Bugs resolved since the Beta Release:
Introduced Balanced and Solid profiles for 1C cores to UltiMaker Method X and Method XL
Improved self-support for UltiMaker MethodX and MethodXL printers so the support extruder will not be used
The prime tower is now always enabled when the second extruder is used for the MethodX and MethodXL printers
Updated the default prime tower position so it doesn't prevent slicing for some printers
Fixed an issue where raft layers were partially printed
Slice information template variables were not available through start-end code formulas
Resolved an issue with 100% support roof for tree support, contributed by @ThomasRahm
Printer Definitions, and Community Translations:
Introduced Ender 3 V3 SE, contributed by @dim1triy
Updated bridge flows for UltiMaker PLA, TPLA and ABS to address pillowing in AA 0.8 for UltiMaker printers
Updated Spanish translation for Lightning infill, contributed by @Pelochus
Updated German translation for Laying object flat on buildplate, contributed by @gluetolf
Updated Brazilian translations, contributed by @Patola
Known Issues:
The predicted printing time for dual extrusion printjobs on the Method series are deviating from the actual printing time.
It’s not possible yet, to use Method series printers with Digital Factory. We hope to resolve this for the next release.
New Engine Plugin:
Not related to this release but nice to mention is that there is a new plugin has been created by the Cura team that makes use of the improved engine plugin capabilities introduced in Cura 5.5 (as mentioned #15629). The plugin is called CuraEngine Tiled Infill Generation and it allows users to select from an expanded list of infill patterns, as well as allowing users to add their own infill pattern by uploading a *.wtk file.
This plugin is just a taste of what is now possible when creating Cura plugins. We look forward to seeing what the Cura community creates next!

New features and improvements:
Engine Plugins:
Introduced infrastructure for Engine Plugins; Plugin developers can now hook into and change the actual slice process using a programming language in which they feel comfortable: C++, Python, C#/.NET, Dart, Go, Java, Kotlin, Node, Objective-C, PHP, Ruby
In this initial version, plugins can hook into the following engine slots:
Modify generated gcode, postprocessing it per layer
Generate Infill patterns
Modify extrusion paths
Listen to a broadcast of all Settings
Cura plugins can now easily add new Settings and extend existing dropdown Settings. Users are now warned if a previously saved project file depends on a plugin and that plugin isn't installed in the Cura instance that tries to load it.
To showcase this new infrastructure we introduced a Gradual Flow Engine plugin; This plugin prevents sudden drastic changes in flow transitions. You can find it under your bundled plugins and the new gradual flow settings can be found in the material category when all settings are visible
Do you want to participate in the discussion about the potential and possibilities? You can join the discussion on GitHub here.
Introduced the following new settings:
Gradual Flow Enabled, Gradual Flow Max Acceleration, Initial Layer Max Flow Acceleration, Gradual Flow discretization step size, are to finetune the Gradual Flow plug-in.
Top Surface Outer Wall Flow, Top Surface Inner Wall Flow, Top Surface Outer Wall Speed, Top Surface Inner Wall Speed, Top Surface Outer Wall Acceleration, Top Surface Inner Wall Acceleration, Top Surface Outer Wall Jerk, and Top Surface Inner Wall Jerk settings can be used to tune the top surface of your models.
Small Top/Bottom Width reduces jerky motions in small top/bottom surfaces, with Small Top/Bottom On Surface you can exclude the setting on the surface
Group Outer Walls will bundle types of walls in the same layer reducing travels, thanks to the contribution by @Arcari55
Enable Fluid Motion, Fluid Motion Shift Distance, Fluid Motions Small Distance, and Fluid Motion Angle are settings for printers with smooth motion planners like Klipper. It's hard to show the changes in preview, but we encourage you to check it out.
Updates in the available supported OSses:
Introduced Max OSX builds for ARM64 (M1 support), next to our existing X64 builds. With major contributions from @TheSin
Introduced a single Linux build removing the need to have a different modern and regular Linux build.
Setting improvements for Ultimaker Printers:
UltiMaker printers with UltiMaker Materials have faster-predicted printing times as a result of a number of changed printing speeds
UltiMaker configurations with limited intents in the past like AA 0.8 cores, now have more intents available
Updated printing temperatures for UltiMaker printers to be more uniform
Updated Support Interface Settings for UltiMaker printers
Introduced a support material tag, so support is automatically printed with support material
Default has been updated to Balanced to reflect the perfect harmony between these visual, engineering, and draft profiles.
Quality of Life Improvements:
Use Tab to navigate between settings in the Per Model Settings window, solves #10967
Introduced Ctrl-C and Ctrl-V next to the current multiply behavior, solves #8859
Arrange your models in a grid with the same orientation with Grid Placement
A message that shows when your Removable Disk is out of space and prevents incomplete gcodes from being saved, solves #14273
Add Printer and Printer Settings windows are now resizable to fit in more start/end gcode in an orderly way
Restored the color picker tool when creating custom materials, solves #11899
You can now scroll through long messages, and can easily close them if you finished reading, solves #12325
Searching for materials and plugins in the Cura Marketplace has been improved
"This Setting Is Hidden Because" icons were missing in the settings visibility for Windows and Mac
Only one file could be loaded and you could not load multiple files if they were mixed STLs and Project Files, solves #15879
It seemed like models could be multiplied more than 99 times, there is now a limit, solves #14105
It's now more clear if Cura is syncing materials over the cloud
It's not possible anymore to send a printjob to a turned off cloud connected UltiMaker printer
More Features:
You can now sponsor the Cura team from the Application Switcher, and Help menu
Infill behavior close to the skin to prevent jerky motions and visible overextrusion
The About Dialog includes more build information for Cura developers
Introduced more hardware info like system, release, version, processor, and CPU cores to the logging to improve troubleshooting.
Updated supporting certify libraries
Introduced a new Post Processing Script; Limit XY Accel for bed-slinger printers, contributed by @GregValiant
Introduced the machine name in the gcode headers, contributed by @smartin015
Extruder settings are cached to speed up slicing, contributed by @sesse
Bug Fixes
Bug Fixes that improve Printed Part Quality
The first support layers were printed incorrectly if adhesion was set to None, solves #14983
Some improvements to the Zseam for user-specified or the sharpest corner seam alignment
The support was printed before the brim when the origin was at the center of the buildplate, solves #14983
Printers with a high resolution value would incorrectly print embossed features,
The flow would unexpectedly increase after a bridge was completed.
Bridging settings would not be applied to the first skin layer if the infill density was set to 0, solves #9056
The skirt height could collide with some models and could be printed in support, solves #16552
A brim would be too small if the extruder was not defined, solves #16151
The Initial Buildplate and Printing Temperature would not be applied correctly when printing One-At-A-Time, solves #11219
Bugs resolved since the Beta Release:
Updated some settings for UltiMaker printers to prevent infill from being exposed, introduce a visual mode for PETG, and prevent stringing for PETG and ABS
Fixed the upgrade script for UltiMaker materials that would cause configuration errors
Updated the arrange algorithm to work better with larger models, solves #14112
Prevented future crashes caused by the new gradual flow plugin with some active printers, solves #16941
Fixed Linux Legacy crashes for open file dialog due to OS icon style, solves #16941
The Linux Appimage had an unnessecarily large file size, solves #16932
The top layers where not showing distinct inner and outer walls in the preview.
A printjob with a different raft extruder could cause a printjob to be considered too large to print
A project file with an intent would not be loaded correctly
Moved the position of the Target Machine name in the start gcode to predicted time and material use for some printers
Restored the ColorDialog to prevent an SDK break, solves #17002
Other Bug Fixes:
You could not load some Marketplace materials with intents on the UltiMaker printers like BASF 17-4PH
For some Linux versions it was not possible to add a 3D printer, solves #15263
Fixed the installation screen for DMG installation because it still had the old logo.
The minimum support area was not working correctly for tree support, contributed by @ThomasRahm
Support Horizontal Expansion would be hidden but influenced the warning values for Support Interface, solves #15873
The shadow in One At A Time printing sequence would not correctly resize with the skirt/brim size, solves #14382
Fixed a bug where it was not possible to select the support structure with basic setting visibility.
Removed the option to change the Brim Distance in the per object setting until a better solution is available.
Fixed a slicing crash if the skirt was larger than the buildplate, solves #16002

Improved slicing time for Tree Support
Introduced 10 new settings and updated 2 so anyone can tune the behavior
Updated options for Tree Support Rest Preference to be more correct
Fixed a bug where Tree Support would generate unsupported islands
Fixed a bug where slicing would fail if Preference was set to On Any Flat Surface
Fixed a bug where branches were not generated when Support Interface was enabled.
Fixed a bug where the Support Overhang Angle caused a crash with Tree Support
Fixed a bug where the Support Interface was not correctly generated with Tree Support
New features and improvements:
Updated the UltiMaker logo to reflect the new company logo
Added support for the updated mainboard revisions of UltiMaker S3, S5, and S7
Introduced Hole Horizontal Expansion Max Diameter so only the expansion of smaller holes can be tuned while leaving larger holes untouched.
Introduced Skirt Height setting to make a skirt easier to remove
Improved the minimum layer time for printers with multiple extruders.
Improved accuracy of when the M104 Hotend Temperature command is added
Improved printing order of the prime tower to include a dual brim, primed every layer, and primed before and after the extruder switch.
Improved behavior for opening and closing categories when adding a new printer
Removed the settings related to Wire Printing since it was broken and barely used.
Upgraded PyQt to version 6.4.2 which improves responsiveness in the UI
Bug Fixes
Fixed a bug where the brim line would not be printed in the same orientation
Fixed a bug where models dropped to the buildplate when they were supposed to be floating
Fixed a bug where models would overlap if multiple models were loaded at the same time
Fixed a bug where an error would be shown too often in One At A Time print sequence
Fixed a bug where the message for a new Beta version available would show up during the Beta.
Fixed a bug where ESun PLA+ would display unsupported.
Fixed a bug where the printjob name was hard to read in darkmode
Fixed a bug where the Minimum Layer Time was incorrectly interpolated
Fixed a bug where Cura would crash on star-up for some Linux systems because of missing SimpleButton, contributed by @fieldOfView
Fixed a bug where the Post Processing Plugin would create extra folders, contributed by @fieldOfView
Fixed AppImage Icon for Linux systems, contributed by @leoheck
Fixed a bug where the buildplate temperature in the USB printing monitor was not rounded, contributed by @asteroids1975
Fixed a bug where retracting for Filament Change was not performed correctly because of an extra /n in the gcode. Contributed by @JuanManuelCuello
Fixed a bug where the material estimation would not show currencies correctly. Contributed by @Diegovd
Bugs resolved since the Beta Release
Fixed a bug where undesirable micro-segments would introduce jagged paths on curved surfaces.
Fixed a bug where it was not possible to use custom support and brim meshes
Fixed a bug Cura would not start when upgrading from a Cura 5.4 Nightly
Fixed a bug where Connect Top/Bottom Polygons would cause a slicing crash
Fixed a bug where generic materials were missing for some printers
Fixed a bug where Support Horizontal Expansion would be incorrectly applied to tree supports
Fixed a bug where nozzles were missing from the Elegoo Neptune 3 Plus. Contributed by @GregValiant
Printer definitions, profiles, and materials:
Introduced UltiMaker PET CF with Annealing and Engineering intents
Updated Infill- and Skin Overlap settings for UltiMaker printers
Enabled a modest Support Brim by default for UltiMaker printers
Updated Support Interface speeds for PVA for UltiMaker printers
Added Gutenberg G-Zero, contributed by @ChipCE
Added Hellbot Magna SE 300, and Magna SE Pro, contributed by @DevelopmentHellbot
Added Kingroon KP3S Pro, contributed by @willuhmjs
Added LNL3D D3, D3 Vulcan, D5 and D6, contributed by @LNL3D
Added Longer LK4 X, contributed by @BradleyFord
Added Mixware Hyper K, Hyper S, Vulcan, and Wand, contributed by @Mixwarebot
Added Snapmaker 2 A150, A250 an A350 dual extruder printers, contributed by @highpowerxh
Added Sovol SV04, contributed by @Joyce-lujunxu
Added Sovol SV06 plus, and updated Sovol SV06, contributed by @Ashok-Varma and @eropple
Added WeeFun Tina2, and WeeFun Tina2, contributed by @syntax1269
Updated Creality 3 S1, Creality 3 S1 Plus, and Creality 3 S1 Pro, contributed by @sparkym3
Updated Cremaker profile to remove material temperature boost, contributed by @hyu7000
Community translations:
Updated Brazilian translations, contributed by @Patola
Known critical issues:
Support Brim is missing if the Buildplate Adhesion is set to None. We are tracking reports here.
Hide seam is actually not hidden and can give random results, for now changing the Seam Corner Preference to None will give better results. We are tracking reports here.
Combing Not In Skin can result in unexpected stringing. We are tracking reports here.
Multiple external monitors on Windows (especially if from the same brand) might be a problem under some circumstances.
Does Cura (not) work on your OS (version)? See this article for clarification.