New option to customize support material extrusion width

README.markdown

@@ -237,6 +237,8 @@ The author is Alessandro Ranellucci.
                             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)
             
 

lib/Slic3r.pm

@@ -111,12 +111,14 @@ our $extrusion_width                = 0;
 our $first_layer_extrusion_width    = 0;
 our $perimeters_extrusion_width     = 0;
 our $infill_extrusion_width         = 0;
+our $support_material_extrusion_width = 0;
 our $bridge_flow_ratio              = 1;
 our $overlap_factor                 = 0.5;
 our $flow;
 our $first_layer_flow;
 our $perimeters_flow;
 our $infill_flow;
+our $support_material_flow;
 
 # print options
 our $perimeters         = 3;

lib/Slic3r/Config.pm

@@ -245,6 +245,11 @@ our $Options = {
         cli     => 'infill-extrusion-width=s',
         type    => 'f',
     },
+    'support_material_extrusion_width' => {
+        label   => 'Support material extrusion width (mm or % or 0 for default)',
+        cli     => 'support-material-extrusion-width=s',
+        type    => 'f',
+    },
     'bridge_flow_ratio' => {
         label   => 'Bridge flow ratio',
         cli     => 'bridge-flow-ratio=f',
@@ -698,8 +703,10 @@ sub validate {
             width        => $Slic3r::first_layer_extrusion_width,
         );
     }
-    $Slic3r::perimeters_flow = $Slic3r::extruders->[0]->make_flow(width => $Slic3r::perimeters_extrusion_width || $Slic3r::extrusion_width);
-    $Slic3r::infill_flow = $Slic3r::extruders->[0]->make_flow(width => $Slic3r::infill_extrusion_width || $Slic3r::extrusion_width);
+    $Slic3r::perimeters_flow        = $Slic3r::extruders->[0]->make_flow(width => $Slic3r::perimeters_extrusion_width || $Slic3r::extrusion_width);
+    $Slic3r::infill_flow            = $Slic3r::extruders->[0]->make_flow(width => $Slic3r::infill_extrusion_width || $Slic3r::extrusion_width);
+    $Slic3r::support_material_flow  = $Slic3r::extruders->[ $Slic3r::support_material_extruder ]
+        ->make_flow(width => $Slic3r::support_material_extrusion_width || $Slic3r::extrusion_width);
     
     Slic3r::debugf "Default flow width = %s, spacing = %s, min_spacing = %s\n",
         $Slic3r::flow->width, $Slic3r::flow->spacing, $Slic3r::flow->min_spacing;

lib/Slic3r/GUI/SkeinPanel.pm

@@ -71,7 +71,7 @@ sub new {
         },
         extrusion => {
             title => 'Extrusion',
-            options => [qw(extrusion_width first_layer_extrusion_width perimeters_extrusion_width infill_extrusion_width bridge_flow_ratio)],
+            options => [qw(extrusion_width first_layer_extrusion_width perimeters_extrusion_width infill_extrusion_width support_material_extrusion_width bridge_flow_ratio)],
         },
         output => {
             title => 'Output',
@@ -117,7 +117,7 @@ sub new {
         $make_tab->([qw(cooling notes)]),
         $make_tab->([qw(printer filament)], [qw(print_speed speed)]),
         $make_tab->([qw(gcode)]),
-        $make_tab->([qw(extrusion sequential_printing)], [qw(output other)]),
+        $make_tab->([qw(extrusion)], [qw(output other sequential_printing)]),
     );
     
     $tabpanel->AddPage(Slic3r::GUI::Plater->new($tabpanel), "Plater");

lib/Slic3r/Print/Object.pm

@@ -490,7 +490,7 @@ sub generate_support_material {
     
     my $threshold_rad           = deg2rad($Slic3r::support_material_threshold + 1);   # +1 makes the threshold inclusive
     my $overhang_width          = $threshold_rad == 0 ? undef : scale $Slic3r::layer_height * ((cos $threshold_rad) / (sin $threshold_rad));
-    my $distance_from_object    = 1.5 * scale $Slic3r::flow->width;
+    my $distance_from_object    = 1.5 * scale $Slic3r::support_material_flow->width;
     
     # determine support regions in each layer (for upper layers)
     Slic3r::debugf "Detecting regions\n";
@@ -514,7 +514,7 @@ sub generate_support_material {
                 [ map @$_, @current_support_regions ],
                 [ map @$_, map $_->expolygon->offset_ex($distance_from_object),  @{$layer->slices} ],
             );
-            $_->simplify(scale $layer->flow->spacing * 2) for @{$layers{$i}};
+            $_->simplify(scale $layer->support_material_flow->spacing * 2) for @{$layers{$i}};
             
             # step 2: get layer overhangs and put them into queue for adding support inside lower layers
             # we need an angle threshold for this
@@ -536,7 +536,7 @@ sub generate_support_material {
     my $support_patterns = [];  # in case we want cross-hatching
     {
         # 0.5 makes sure the paths don't get clipped externally when applying them to layers
-        my @support_material_areas = map $_->offset_ex(- 0.5 * scale $Slic3r::flow->width),
+        my @support_material_areas = map $_->offset_ex(- 0.5 * scale $Slic3r::support_material_flow->width),
             @{union_ex([ map $_->contour, map @$_, values %layers ])};
         
         my $fill = Slic3r::Fill->new(print => $params{print});
@@ -547,8 +547,8 @@ sub generate_support_material {
             foreach my $expolygon (@support_material_areas) {
                 my @paths = $filler->fill_surface(
                     Slic3r::Surface->new(expolygon => $expolygon),
-                    density         => $Slic3r::flow->spacing / $Slic3r::support_material_spacing,
-                    flow_spacing    => $Slic3r::flow->spacing,
+                    density         => $Slic3r::support_material_flow->spacing / $Slic3r::support_material_spacing,
+                    flow_spacing    => $Slic3r::support_material_flow->spacing,
                 );
                 my $params = shift @paths;
                 

slic3r.pl

@@ -282,6 +282,8 @@ $j
                         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: $Slic3r::bridge_flow_ratio)
     
 EOF