PrusaSlicer 1.31.2

Slic3r Prusa Edition Slic3r 1.31.2 - Prusa Edition

Summary:

This is the Slic3r 1.31.2 - Prusa Edition release. We at Prusa3D decided to push the Slic3r development forward at a higher pace, meaning that our Slic3r Prusa Edition now contains features, which are not yet implemented in the official Slic3r. The source code of the Slic3r Prusa Edition is freely available, so the authors and maintainers of the official Slic3r are more than welcome to integrate our changes and extensions into the official Slic3r. This release of Slic3r does not contain any Prusa3D specific fatures: All newly implemented features are general, so the community could benefit from our work.

This release will be contained in the Prusa3D drivers package version 1.7.5 available here: www.prusa3d.com/drivers/ ↗ When using this release of Slic3r with the Original Prusa i3 MK2 printer, following configuration files shall be used: github.com/prusa3d/Slic3r-settings ↗

This release contains following bug fixes:

General

• Fixed a problem in 3D preview of huge models, where the preceding Slic3r allocated oversized OpenGL vertex arrays. After such an incident, the OpenGL driver often bailed out and stopped displaying the 3D scenes.
• Fixed the vase mode with relative extruder coordinates enabled.
• Disabled the automatic extrusion width adjustment for infills as it sometimes picked excessive values. The automatic extrusion width adjustment has a questionable value, as it really works only for rectangles parallel to the infill direction.
• Bugfix: Use Lift-z option for 2nd extruder github.com/alexrj/Slic3r/pull/3392 ↗ . Thanks to github.com/platsch ↗
• Prusa3D specific: The builds missed libraries for the AMF format. Now the AMF format is supported by the Prusa3D builds.

Supports

• Fixed a typo in the automatic detection of overhangs for supports github.com/alexrj/Slic3r/pull/2098. ↗ Thanks to github.com/hyperair ↗
• Fixed a problem in support generator: When the number of interface layers was set to zero, Slic3r would put infinite number of interface layers over top surfaces.

Bridging

• Fixed a problem in internal bridging over sparse infill, where the bridging infill could overflow out of the object shell.
• Bugfix of bridging nearly touching regions. Slic3r would bridge each letter of a label separately, often leading to an infill starting in the middle of a region. Now these close regions are merged before bridging.

Infill

• More consistent perimeter / infill overlap for rectilinear and grid infills. The old Slic3r silently added a 30% overlap to the rectilinear infills, which was inconsistent with the other infill patterns.
• Fixed a bug in fill density of a rectilinear infill pattern. The old Slic3r placed 2x more material into the rectilinear infill then configured.
• Fixed a bug in the Octagram Spiral pattern. The old Slic3r did not fill the space completely for 100% infill.

Following new features were implemented:

General

• Command line only feature: Don't arrange the objects on the build plate. The model coordinates define the absolute positions on the build plate.

Perimeters

• Suppress placement of perimeter seam points on overhangs.
• Ensure vertical shell thickness. This is similar to extra perimeters, but it uses a solid infill to guarantee the vertical shell thickness instead. Cura, Kisslicer and Simplify3D use this strategy.

Infill

• Two new infill types: Triangles and Cubic. The Cubic infill style is the pattern popularized by the Type A Machines.
• The rectilinear and grid infills are now following the perimeter lines for better bonding, and the infill paths are stitched to longer continuous draws, meaning less non-printing moves.

Supports

• Sheath (single perimeter) over the base support was made configurable. Supports without the sheath are less stable, but much easier to remove. Kisslicer has the sheath configurable, Simplify3D does not use a sheath at all.
• Smarter rectilinear pattern for the supports. The new pattern follows the enclosing perimeters and it strives to print the pattern in as little as possible continuous draws.
• Support material could now be constrained to touching build plate only.

User Interface

• "Background slice now" button, initial implementation by @lordofhyphens github.com/alexrj/Slic3r/pull/3501 ↗
• 2nd scroll bar is shown at the 3D paths preview to set the bottom layer displayed.
• New View menu to set the camera to default positions / orientations.
• Suppress the '- default -' selection of Print/Filament/Printer settings if there is any valid option available. This feature has been asked for by the Prusa3D customers as the '- default -' option has nothing to do with the actual printer and when selected accidentally, it could even lead to a printer damage.
• Implemented filament notes.

Experimental Features

• Extrusion simulator. Under/over-extrusion is visualized in the Layers view by colors. Just press the numeric button 1 to 5 to switch between the simulation modes.
• Pressure Equalizer. Print speed is regulated to limit the slope of the change of the volumetric extrusion rate. The Pressure Equalizer is not finalized yet, it does not work well with gap fill.
• Filament specific maximum volumetric speed (filamentmaxvolumetric_speed config value). This feature is very helpful when mixing rigid and soft materials.