Slic3r

What's it?

Slic3r is an STL-to-GCODE translator for RepRap 3D printers, like Enrique's Skeinforge or RevK's E3D.

Why a new one? Why Perl?

The purpose is to build something more maintainable and flexible than both Skeinforge and E3D. The code makes extensive use of object-oriented programming to achieve some level of abstraction instead of working with raw geometry and low-level data structures. This should help to maintain code, fix bugs and implement new and better algorithms in the future. I also aim at implementing better support for hollow objects, as Skeinforge isn't smart enough to generate internal support structures for horizontal facets.

Also, http://xkcd.com/224/

What's its current status?

Slic3r current features are:

read binary and ASCII STL files;
generate multiple perimeters (skins);
generate rectilinear fill;
set 0% - 100% infill density;
set infill angle;
retraction;
skirt (with rounded corners);
use relative or absolute extrusion commands;
center print around bed center point;
multiple solid layers near horizontal external surfaces;
ability to scale, rotate and multiply input object;
use different speed for bottom layer.

Roadmap includes the following goals:

output some statistics;
allow the user to customize initial and final GCODE commands;
support material for internal perimeters;
ability to infill in the direction of bridges;
cool;
other fill patterns;
nice packaging for cross-platform deployment.

Is it usable already?

Yes, although its extrusion math needs to be tested. I need to write a script to install dependencies and to package dependency-free executables for main platforms.

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?

Usage: slic3r.pl [ OPTIONS ] file.stl

    --help              Output this usage screen and exit
    
  Printer options:
    --nozzle-diameter   Diameter of nozzle in mm (default: 0.55)
    --print-center      Coordinates of the point to center the print around 
                        (default: 100,100)
    --use-relative-e-distances
                        Use relative distances for extrusion in GCODE output
    --z-offset          Additional height in mm to add to vertical coordinates
                        (+/-, default: 0)
    
  Filament options:
    --filament-diameter Diameter of your raw filament (default: 3)
    --filament-packing-density
                        Ratio of the extruded volume over volume pushed 
                        into the extruder (default: 0.85)
    
  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)
    --perimeter-feed-rate
                        Speed of print moves for perimeters in mm/sec (default: 60)
    --bottom-layer-speed-ratio
                        Factor to increase/decrease speeds on bottom 
                        layer by (default: 0.3)
    
  Accuracy options:
    --layer-height      Layer height in mm (default: 0.4)
  
  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)
    --temperature       Extrusion temperature (default: 200)
  
  Retraction options:
    --retract-length    Length of retraction in mm when pausing extrusion 
                        (default: 1)
    --retract-speed     Speed for retraction in mm/sec (default: 40)
    --retract-restart-extra
                        Additional amount of filament in mm to push after
                        compensating retraction (default: 0)
    --retract-before-travel
                        Only retract before travel moves of this length (default: 1)
   
   Skirt options:
    --skirts            Number of skirts to draw (default: 1)
    --skirt-distance    Distance in mm between innermost skirt and object 
                        (default: 6)
    -o, --output        File to output gcode to (default: <inputfile>.gcode)
   
   Transform options:
    --scale             Factor for scaling input object (default: 1)
    --rotate            Rotation angle in degrees (0-360, default: 0)
    --multiply-x        Number of items along X axis (1+, default: 1)
    --multiply-y        Number of items along Y axis (1+, default: 1)
    --multiply-distance Distance in mm between copies (default: 6)

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