UltiMaker Cura Arachne_engine_beta_2

Our new Ultimaker Cura engine allows you to create parts with ground-breaking quality, strength, and speed. This is made possible by fundamentally redefining how the inside of a model is generated – through adaptive line widths and optimized line positioning. Earlier this year, we released the first beta of Ultimaker Cura Arachne engine. Which received an overwhelmingly positive response, thank you for all your feedback! Since the first beta release we've been working on improving the Arachne engine. Join our discussion on GitHub to provide us with all your feedback.

Back pressure compensation Print quality is improved through dynamically adjusting print head velocity, which slows down or speeds up depending on the pressure of the material through the Bowden tube.

Printing order filling gaps Gaps in models are now filled in after placing the outer wall, resulting in less over-extrusion.

Print quality enhancements All print quality improvements from Ultimaker Cura 4.12 have been added.

New settings:

• Split Middle Line Threshold
• Add Middle Line Threshold
• Expose the Distribution radius of the Inward Distributed strategy

Bug fixes:

• Fixed a bug with concentric skin lines
• Fixed memory usage, contributed by @Piezoid
• Fixed a bug with opening old project files in Arachne
• Fixed a bug where the width was not adjusted
• Fixed a bug with Line Compactness behaviour was inversed for Central Deviation
• Fixed a bug with tiny movements which caused a nozzle slowdown
• Fixed a bug where blobs in g-code were generated
• Fixed a bug with Minimum Wall Line Width setting was used if Print Thin Walls was disabled
• Fixed a bug where the Inner Line Width was wider than the end of the model
• Fixed a bug where Maximum Resolution was not applied for hyperbolic arcs in inner walls
• Fixed a bug where Combing was broken
• Fixed a engine crash within the inset order optimizer with 3 walls, contributed by @Piezoid
• Fixed a bug where the Seam placement was not on the correct corner
• Fixed a bug where the centerline of Central Deviation is not generated
• Fixed a bug with Bottom Skin Expand Distance at zero caused skin to expand beyond walls

Known issues:

• Gaps in inner wall where it has enough space to print one line
• Unwanted travel moves when monotonic order in enabled
• Printer pauses at certain layer creating dripping spots
• Retracted unnecessary travel moves

Note: This is not based on a specific stable version of the front-end of Cura (like '4.12.0' or similar), so there may be issues that have been solved or introduced since then that have little or nothing to do with the variable line width feature-set!