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_Q: Oh cool, a new RepRap slicer?_
A: Yes.
# Slic3r
## What's it?
Slic3r is a G-code generator for 3D printers. It's compatible with RepRaps,
Makerbots, Ultimakers and many more machines.
See the [project homepage](http://slic3r.org/) at slic3r.org and the
[documentation](https://github.com/alexrj/Slic3r/wiki/Documentation) on the Slic3r wiki 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 as well as OBJ and AMF;
* powerful command line interface;
* easy GUI with plating and manipulation facilities;
* multithreaded;
* 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 objects;
* customizable initial and final G-code;
* support material;
* cooling and fan control;
* use different speed for bottom layer, perimeters, small perimeters, bridges, solid infill;
* ability to print complete objects before moving onto next one.
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;
* more GUI work;
* more fill patterns;
* a more complete roadmap is needed too ;-)
## How to install?
It's very easy. See the [project homepage](http://slic3r.org/)
for instructions and links to the precompiled packages that you can just
download and run, with no dependencies required.
## Can I help?
Sure! Drop me a line at aar@cpan.org. You can also
find me in #reprap and in #slic3r on FreeNode with the nickname _Sound_.
Before sending patches and pull requests contact me to discuss your proposed
changes: this way we'll ensure nobody wastes their time and no conflicts arise
in development.
## What's Slic3r license?
Slic3r is licensed under the _GNU Affero General Public License, version 3_.
The author is Alessandro Ranellucci.
The [Silk icon set](http://www.famfamfam.com/lab/icons/silk/) used in Slic3r is
licensed under the _Creative Commons Attribution 3.0 License_.
The author of the Silk icon set is Mark James.
## How can I invoke slic3r.pl using the command line?
Usage: slic3r.pl [ OPTIONS ] file.stl
--help Output this usage screen and exit
--version Output the version of Slic3r and exit
--save <file> Save configuration to the specified file
--load <file> Load configuration from the specified file. It can be used
more than once to load options from multiple files.
-o, --output <file> File to output gcode to (by default, the file will be saved
into the same directory as the input file using the
--output-filename-format to generate the filename)
Output options:
--output-filename-format
Output file name format; all config options enclosed in brackets
will be replaced by their values, as well as [input_filename_base]
and [input_filename] (default: [input_filename_base].gcode)
--post-process Generated G-code will be processed with the supplied script;
call this more than once to process through multiple scripts.
--export-svg Export a SVG file containing slices instead of G-code.
-m, --merge If multiple files are supplied, they will be composed into a single
print rather than processed individually.
Printer options:
--nozzle-diameter Diameter of nozzle in mm (default: 0.5)
--print-center Coordinates in mm of the point to center the print around
(default: 100,100)
--z-offset Additional height in mm to add to vertical coordinates
(+/-, default: 0)
--gcode-flavor The type of G-code to generate (reprap/teacup/makerbot/mach3/no-extrusion,
default: reprap)
--use-relative-e-distances Enable this to get relative E values
--gcode-arcs Use G2/G3 commands for native arcs (experimental, not supported
by all firmwares)
--g0 Use G0 commands for retraction (experimental, not supported by all
firmwares)
--gcode-comments Make G-code verbose by adding comments (default: no)
Filament options:
--filament-diameter Diameter in mm of your raw filament (default: 3)
--extrusion-multiplier
Change this to alter the amount of plastic extruded. There should be
very little need to change this value, which is only useful to
compensate for filament packing (default: 1)
--temperature Extrusion temperature in degree Celsius, set 0 to disable (default: 200)
--first-layer-temperature Extrusion temperature for the first layer, in degree Celsius,
set 0 to disable (default: same as --temperature)
--bed-temperature Heated bed temperature in degree Celsius, set 0 to disable (default: 0)
--first-layer-bed-temperature Heated bed temperature for the first layer, in degree Celsius,
set 0 to disable (default: same as --bed-temperature)
Speed options:
--travel-speed Speed of non-print moves in mm/s (default: 130)
--perimeter-speed Speed of print moves for perimeters in mm/s (default: 30)
--small-perimeter-speed
Speed of print moves for small perimeters in mm/s or % over perimeter speed
(default: 30)
--external-perimeter-speed
Speed of print moves for the external perimeter in mm/s or % over perimeter speed
(default: 100%)
--infill-speed Speed of print moves in mm/s (default: 60)
--solid-infill-speed Speed of print moves for solid surfaces in mm/s or % over infill speed
(default: 60)
--top-solid-infill-speed Speed of print moves for top surfaces in mm/s or % over solid infill speed
(default: 50)
--bridge-speed Speed of bridge print moves in mm/s (default: 60)
--first-layer-speed Speed of print moves for bottom layer, expressed either as an absolute
value or as a percentage over normal speeds (default: 30%)
Accuracy options:
--layer-height Layer height in mm (default: 0.4)
--first-layer-height Layer height for first layer (mm or %, default: 100%)
--infill-every-layers
Infill every N layers (default: 1)
--solid-infill-every-layers
Force a solid layer every N layers (default: 0)
Print options:
--perimeters Number of perimeters/horizontal skins (range: 0+, default: 3)
--top-solid-layers Number of solid layers to do for top surfaces (range: 0+, default: 3)
--bottom-solid-layers Number of solid layers to do for bottom surfaces (range: 0+, default: 3)
--solid-layers Shortcut for setting the two options above at once
--fill-density Infill density (range: 0-1, default: 0.4)
--fill-angle Infill angle in degrees (range: 0-90, default: 45)
--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 G-code from the supplied file. This will overwrite
the default command (home all axes [G28]).
--end-gcode Load final G-code from the supplied file. This will overwrite
the default commands (turn off temperature [M104 S0],
home X axis [G28 X], disable motors [M84]).
--layer-gcode Load layer-change G-code from the supplied file (default: nothing).
--extra-perimeters Add more perimeters when needed (default: yes)
--randomize-start Randomize starting point across layers (default: yes)
--only-retract-when-crossing-perimeters
Disable retraction when travelling between infill paths inside the same island.
(default: no)
--solid-infill-below-area
Force solid infill when a region has a smaller area than this threshold
(mm^2, default: 70)
Support material options:
--support-material Generate support material for overhangs
--support-material-threshold
Overhang threshold angle (range: 0-90, default: 45)
--support-material-pattern
Pattern to use for support material (default: rectilinear)
--support-material-spacing
Spacing between pattern lines (mm, default: 2.5)
--support-material-angle
Support material angle in degrees (range: 0-90, default: 0)
Retraction options:
--retract-length Length of retraction in mm when pausing extrusion (default: 1)
--retract-speed Speed for retraction in mm/s (default: 30)
--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 in mm (default: 2)
--retract-lift Lift Z by the given distance in mm when retracting (default: 0)
Retraction options for multi-extruder setups:
--retract-length-toolchange
Length of retraction in mm when disabling tool (default: 1)
--retract-restart-extra-toolchnage
Additional amount of filament in mm to push after
switching tool (default: 0)
Cooling options:
--cooling Enable fan and cooling control
--min-fan-speed Minimum fan speed (default: 35%)
--max-fan-speed Maximum fan speed (default: 100%)
--bridge-fan-speed Fan speed to use when bridging (default: 100%)
--fan-below-layer-time Enable fan if layer print time is below this approximate number
of seconds (default: 60)
--slowdown-below-layer-time Slow down if layer print time is below this approximate number
of seconds (default: 15)
--min-print-speed Minimum print speed (mm/s, default: 10)
--disable-fan-first-layers Disable fan for the first N layers (default: 1)
--fan-always-on Keep fan always on at min fan speed, even for layers that don't need
cooling
Skirt options:
--skirts Number of skirts to draw (0+, default: 1)
--skirt-distance Distance in mm between innermost skirt and object
(default: 6)
--skirt-height Height of skirts to draw (expressed in layers, 0+, default: 1)
--brim-width Width of the brim that will get added to each object to help adhesion
(mm, default: 0)
Transform options:
--scale Factor for scaling input object (default: 1)
--rotate Rotation angle in degrees (0-360, default: 0)
--duplicate Number of items with auto-arrange (1+, default: 1)
--bed-size Bed size, only used for auto-arrange (mm, default: 200,200)
--duplicate-grid Number of items with grid arrangement (default: 1,1)
--duplicate-distance Distance in mm between copies (default: 6)
Sequential printing options:
--complete-objects When printing multiple objects and/or copies, complete each one before
starting the next one; watch out for extruder collisions (default: no)
--extruder-clearance-radius Radius in mm above which extruder won't collide with anything
(default: 20)
--extruder-clearance-height Maximum vertical extruder depth; i.e. vertical distance from
extruder tip and carriage bottom (default: 20)
Miscellaneous options:
--notes Notes to be added as comments to the output file
Flow options (advanced):
--extrusion-width Set extrusion width manually; it accepts either an absolute value in mm
(like 0.65) or a percentage over layer height (like 200%)
--first-layer-extrusion-width
Set a different extrusion width for first layer
--perimeters-extrusion-width
Set a different extrusion width for perimeters
--infill-extrusion-width
Set a different extrusion width for infill
--support-material-extrusion-width
Set a different extrusion width for support material
--bridge-flow-ratio Multiplier for extrusion when bridging (> 0, default: 1)
Multiple extruder options:
--extruder-offset Offset of each extruder, if firmware doesn't handle the displacement
(can be specified multiple times, default: 0x0)
--perimeters-extruder
Extruder to use for perimeters (1+, default: 1)
--infill-extruder Extruder to use for infill (1+, default: 1)
--support-material-extruder
Extruder to use for support material (1+, default: 1)
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
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