disable_rapid_cooling_fan_first_layers

src/libslic3r/GCode/CoolingBuffer.cpp

@@ -764,6 +764,11 @@ std::string CoolingBuffer::apply_layer_cooldown(
 
         std::pair<int, int> custom_fan_speed_limits{fan_speed_new, 100 };
         int disable_fan_first_layers = EXTRUDER_CONFIG(disable_fan_first_layers);
+
+        //B39
+        int disable_rapid_cooling_fan_first_layers = EXTRUDER_CONFIG(disable_rapid_cooling_fan_first_layers);
+
+
         // Is the fan speed ramp enabled?
         int full_fan_speed_layer = EXTRUDER_CONFIG(full_fan_speed_layer);
         if (disable_fan_first_layers <= 0 && full_fan_speed_layer > 0) {
@@ -810,8 +815,8 @@ std::string CoolingBuffer::apply_layer_cooldown(
             fan_gcode << "M106 P2 S" << 255.0 * enable_auxiliary_fan / 100.0 << "\n";
             new_gcode += fan_gcode.str();
         }
-        //B25
-        if (int(layer_id) == disable_fan_first_layers && enable_volume_fan != 0 && fan_speed_new != m_fan_speed) {
+        //B25 //B39
+        if (int(layer_id) == disable_rapid_cooling_fan_first_layers && enable_volume_fan != 0 ) {
             std::ostringstream fan_gcode;
             fan_gcode << "M106 P3 S" << 255.0 * enable_volume_fan / 100.0 << "\n";
             new_gcode += fan_gcode.str();

src/libslic3r/Preset.cpp

@@ -516,7 +516,9 @@ static std::vector<std::string> s_Preset_filament_options {
     //B26
     "advance_pressure",
     //B26
-    "smooth_time"
+    "smooth_time",
+    //B39
+    "disable_rapid_cooling_fan_first_layers"
 };
 
 static std::vector<std::string> s_Preset_machine_limits_options {

src/libslic3r/Print.cpp

@@ -78,6 +78,8 @@ bool Print::invalidate_state_by_config_options(const ConfigOptionResolver & /* n
         "default_acceleration",
         "deretract_speed",
         "disable_fan_first_layers",
+        //B39
+        "disable_rapid_cooling_fan_first_layers",
         "duplicate_distance",
         "end_gcode",
         "end_filament_gcode",

src/libslic3r/PrintConfig.cpp

@@ -778,6 +778,17 @@ void PrintConfigDef::init_fff_params()
     def->mode = comExpert;
     def->set_default_value(new ConfigOptionInts { 3 });
 
+    //B39
+    def = this->add("disable_rapid_cooling_fan_first_layers", coInts);
+    def->label = L("Disable rapid cooling fan for the first");
+    def->tooltip = L("You can set this to a positive value to disable rapid cooling fan at all "
+                   "during the first layers, so that it does not make adhesion worse.");
+    def->sidetext = L("layers");
+    def->min = 0;
+    def->max = 1000;
+    def->mode = comExpert;
+    def->set_default_value(new ConfigOptionInts { 3 });
+
     def = this->add("dont_support_bridges", coBool);
     def->label = L("Don't support bridges");
     def->category = L("Support material");
@@ -1368,7 +1379,7 @@ void PrintConfigDef::init_fff_params()
     //B36
     def           = this->add("first_layer_travel_speed", coFloat);
     def->label    = L("First layer travel");
-    def->tooltip  = L("Speed for travel moves (jumps between distant extrusion points).");
+    def->tooltip  = L("Speed for travel moves of the first layer (jumps between distant extrusion points).");
     def->sidetext = L("mm/s");
     def->aliases  = {"travel_feed_rate"};
     def->min      = 1;
@@ -1378,9 +1389,9 @@ void PrintConfigDef::init_fff_params()
     //B37
     def           = this->add("first_layer_external_perimeter_speed", coFloat);
     def->label    = L("First layer external perimeters");
-    def->tooltip  = L("Speed for travel moves (jumps between distant extrusion points).");
+    def->tooltip  = L("Speed for external perimeters of the first layer (jumps between distant extrusion points).");
     def->sidetext = L("mm/s");
-    def->aliases  = {"travel_feed_rate"};
+    def->aliases  = {"external_perimeter_speed"};
     def->min      = 1;
     def->mode     = comAdvanced;
     def->set_default_value(new ConfigOptionFloat(130));

src/libslic3r/PrintConfig.hpp

@@ -788,6 +788,8 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     ((ConfigOptionInts,               enable_auxiliary_fan))     
     ((ConfigOptionFloat,              default_acceleration))
     ((ConfigOptionInts,               disable_fan_first_layers))
+    //B39
+    ((ConfigOptionInts,               disable_rapid_cooling_fan_first_layers))
     ((ConfigOptionEnum<DraftShield>,  draft_shield))
     ((ConfigOptionFloat,              duplicate_distance))
     ((ConfigOptionFloat,              external_perimeter_acceleration))

src/slic3r/GUI/Tab.cpp

@@ -2104,6 +2104,8 @@ void TabFilament::build()
         //B25
         optgroup->append_single_option_line("enable_volume_fan", category_path + "fan-settings");
         optgroup->append_single_option_line("disable_fan_first_layers", category_path + "fan-settings");
+        //B39
+        optgroup->append_single_option_line("disable_rapid_cooling_fan_first_layers", category_path + "fan-settings");
         optgroup->append_single_option_line("full_fan_speed_layer", category_path + "fan-settings");
 
         optgroup = page->new_optgroup(L("Dynamic fan speeds"), 25);