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Q: Oh cool, a new RepRap slicer?

A: Yes.


What's it?

Slic3r is an STL-to-GCODE translator for RepRap 3D printers, aiming to be a modern and fast alternative to Skeinforge.

See the project homepage at slic3r.org for more information.

What language is it written in?

Proudly Perl, with some parts in C++. If you're wondering why Perl, see http://xkcd.com/224/

What's its current status?

Slic3r current key features are:

  • multi-platform (Linux/Mac/Win) and packaged as standalone-app with no dependencies required;
  • easy configuration/calibration;
  • read binary and ASCII STL files;
  • powerful command line interface;
  • easy GUI
  • multiple infill patterns, with customizable density and angle;
  • retraction;
  • skirt;
  • infill every N layers (like the "Skin" plugin for Skeinforge);
  • detect optimal infill direction for bridges;
  • save configuration profiles;
  • center print around bed center point;
  • multiple solid layers near horizontal external surfaces;
  • ability to scale, rotate and duplicate input object;
  • customizable initial and final GCODE;
  • use different speed for bottom layer and perimeters.

Experimental features include:

  • generation of G2/G3 commands for native arcs;
  • G0 commands for fast retraction.

Roadmap includes the following goals:

  • output some statistics;
  • support material for internal perimeters;
  • new and better GUI;
  • cool;
  • other fill patterns.

Is it usable already? Any known limitation?

Sure, it's very usable. Remember that:

  • it doesn't currently support single-walled parts (such as thin calibration objects);
  • it doesn't generate support material;
  • it only works well with manifold models (check them with Meshlab or Netfabb or http://cloud.netfabb.com/).

How to install?

It's very easy. See the project homepage for instructions and links to the precompiled packages.

Can I help?

Sure! Send patches and/or drop me a line at aar@cpan.org. You can also find me in #reprap on FreeNode with the nickname Sound.

What's Slic3r license?

Slic3r is dual-licensed under the Perl Artistic License and the AGPLv3. The author is Alessandro Ranellucci (me).

How can I invoke slic3r.pl using the command line?

Usage: slic3r.pl [ OPTIONS ] file.stl

    --help              Output this usage screen and exit
    --save <file>       Save configuration to the specified file
    --load <file>       Load configuration from the specified file
    -o, --output        File to output gcode to (default: <inputfile>.gcode)
  Printer options:
    --nozzle-diameter   Diameter of nozzle in mm (default: 0.5)
    --print-center      Coordinates of the point to center the print around 
                        (default: 100,100)
                        Use relative distances for extrusion in GCODE output
    --no-extrusion      Do not output any E value in GCODE
    --z-offset          Additional height in mm to add to vertical coordinates
                        (+/-, default: 0)
    --gcode-arcs        Use G2/G3 commands for native arcs (experimental, not supported
                        by all firmwares)
  Filament options:
    --filament-diameter Diameter in mm of your raw filament (default: 3)
                        Ratio of the extruded volume over volume pushed 
                        into the extruder (default: 1)
    --temperature       Extrusion temperature (default: 200)
  Speed options:
    --print-feed-rate   Speed of print moves in mm/sec (default: 60)
    --travel-feed-rate  Speed of non-print moves in mm/sec (default: 130)
                        Speed of print moves for perimeters in mm/sec (default: 60)
                        Factor to increase/decrease speeds on bottom 
                        layer by (default: 0.3)
  Accuracy options:
    --layer-height      Layer height in mm (default: 0.4)
                        Multiplication factor for the height to slice and print the first
                        layer with (> 0, default: 1)
                        Infill every N layers (default: 1)
  Print options:
    --perimeters        Number of perimeters/horizontal skins (range: 1+, 
                        default: 3)
    --solid-layers      Number of solid layers to do for top/bottom surfaces
                        (range: 1+, default: 3)
    --fill-density      Infill density (range: 0-1, default: 0.4)
    --fill-angle        Infill angle in degrees (range: 0-90, default: 0)
    --fill-pattern      Pattern to use to fill non-solid layers (default: rectilinear)
    --solid-fill-pattern Pattern to use to fill solid layers (default: rectilinear)
    --start-gcode       Load initial gcode from the supplied file. This will overwrite
                        the default command (home all axes [G28]).
    --end-gcode         Load final gcode from the supplied file. This will overwrite 
                        the default commands (turn off temperature [M104 S0],
                        home X axis [G28 X], disable motors [M84]).
  Retraction options:
    --retract-length    Length of retraction in mm when pausing extrusion 
                        (default: 1)
    --retract-speed     Speed for retraction in mm/sec (default: 40)
                        Additional amount of filament in mm to push after
                        compensating retraction (default: 0)
                        Only retract before travel moves of this length (default: 2)
    --retract-lift      Lift Z by the given distance in mm when retracting (default: 0)
   Skirt options:
    --skirts            Number of skirts to draw (default: 1)
    --skirt-distance    Distance in mm between innermost skirt and object 
                        (default: 6)
    --skirt-height      Height of skirts to draw (expressed in layers, default: 1)
   Transform options:
    --scale             Factor for scaling input object (default: 1)
    --rotate            Rotation angle in degrees (0-360, default: 0)
    --duplicate-x       Number of items along X axis (1+, default: 1)
    --duplicate-y       Number of items along Y axis (1+, default: 1)
    --duplicate-distance Distance in mm between copies (default: 6)

If you want to change a preset file, just do

slic3r.pl --load config.ini --layer-height 0.25 --save config.ini

If you want to slice a file overriding an option contained in your preset file:

slic3r.pl --load config.ini --layer-height 0.25 file.stl