New experimental parameter to adjust initial loading speed of the filament from the nozzle

5 files changed, 17 insertions, 3 deletions

diff --git a/xs/src/libslic3r/GCode/WipeTowerPrusaMM.cpp b/xs/src/libslic3r/GCode/WipeTowerPrusaMM.cpp
index 4009ebf3a..de1f9a59b 100644
--- a/xs/src/libslic3r/GCode/WipeTowerPrusaMM.cpp
+++ b/xs/src/libslic3r/GCode/WipeTowerPrusaMM.cpp
@@ -793,7 +793,7 @@ void WipeTowerPrusaMM::toolchange_Unload(
     float turning_point = (!m_left_to_right ? xl : xr );
     float total_retraction_distance = m_cooling_tube_retraction + m_cooling_tube_length/2.f - 15.f; // the 15mm is reserved for the first part after ramming
     writer.suppress_preview()
-          .retract(15.f, 5000.f) // feedrate 5000mm/min = 83mm/s
+          .retract(15.f, m_filpar[m_current_tool].unloading_speed_start * 60.f) // feedrate 5000mm/min = 83mm/s
           .retract(0.70f * total_retraction_distance, 1.0f * m_filpar[m_current_tool].unloading_speed * 60.f)
           .retract(0.20f * total_retraction_distance, 0.5f * m_filpar[m_current_tool].unloading_speed * 60.f)
           .retract(0.10f * total_retraction_distance, 0.3f * m_filpar[m_current_tool].unloading_speed * 60.f)
diff --git a/xs/src/libslic3r/GCode/WipeTowerPrusaMM.hpp b/xs/src/libslic3r/GCode/WipeTowerPrusaMM.hpp
index e1529bcf4..4b96ce17c 100644
--- a/xs/src/libslic3r/GCode/WipeTowerPrusaMM.hpp
+++ b/xs/src/libslic3r/GCode/WipeTowerPrusaMM.hpp
@@ -66,8 +66,8 @@ public:
 
 	// Set the extruder properties.
 	void set_extruder(size_t idx, material_type material, int temp, int first_layer_temp, float loading_speed,
-                      float unloading_speed, float delay, int cooling_moves, float cooling_initial_speed,
-                      float cooling_final_speed, std::string ramming_parameters, float nozzle_diameter)
+                      float unloading_speed, float unloading_speed_start, float delay, int cooling_moves,
+                      float cooling_initial_speed, float cooling_final_speed, std::string ramming_parameters, float nozzle_diameter)
 	{
         //while (m_filpar.size() < idx+1)   // makes sure the required element is in the vector
         m_filpar.push_back(FilamentParameters());
@@ -77,6 +77,7 @@ public:
         m_filpar[idx].first_layer_temperature = first_layer_temp;
         m_filpar[idx].loading_speed = loading_speed;
         m_filpar[idx].unloading_speed = unloading_speed;
+        m_filpar[idx].unloading_speed_start = unloading_speed_start;
         m_filpar[idx].delay = delay;
         m_filpar[idx].cooling_moves = cooling_moves;
         m_filpar[idx].cooling_initial_speed = cooling_initial_speed;
@@ -217,6 +218,7 @@ private:
         int  			    first_layer_temperature = 0;
         float               loading_speed = 0.f;
         float               unloading_speed = 0.f;
+        float               unloading_speed_start = 0.f;
         float               delay = 0.f ;
         int                 cooling_moves = 0;
         float               cooling_initial_speed = 0.f;
diff --git a/xs/src/libslic3r/Print.cpp b/xs/src/libslic3r/Print.cpp
index 7d2906bcc..4154378ec 100644
--- a/xs/src/libslic3r/Print.cpp
+++ b/xs/src/libslic3r/Print.cpp
@@ -201,6 +201,7 @@ bool Print::invalidate_state_by_config_options(const std::vector<t_config_option
             || opt_key == "first_layer_temperature"
             || opt_key == "filament_loading_speed"
             || opt_key == "filament_unloading_speed"
+            || opt_key == "filament_unloading_speed_start"
             || opt_key == "filament_toolchange_delay"
             || opt_key == "filament_cooling_moves"
             || opt_key == "filament_minimal_purge_on_wipe_tower"
@@ -1124,6 +1125,7 @@ void Print::_make_wipe_tower()
             this->config.first_layer_temperature.get_at(i),
             this->config.filament_loading_speed.get_at(i),
             this->config.filament_unloading_speed.get_at(i),
+            this->config.filament_unloading_speed_start.get_at(i),
             this->config.filament_toolchange_delay.get_at(i),
             this->config.filament_cooling_moves.get_at(i),
             this->config.filament_cooling_initial_speed.get_at(i),
diff --git a/xs/src/libslic3r/PrintConfig.cpp b/xs/src/libslic3r/PrintConfig.cpp
index d8f2d85a6..cb09a9d09 100644
--- a/xs/src/libslic3r/PrintConfig.cpp
+++ b/xs/src/libslic3r/PrintConfig.cpp
@@ -482,6 +482,14 @@ PrintConfigDef::PrintConfigDef()
     def->min = 0;
     def->default_value = new ConfigOptionFloats { 90. };
 
+    def = this->add("filament_unloading_speed_start", coFloats);
+    def->label = L("EXPERIMENTAL: Unloading speed at the start");
+    def->tooltip = L("Speed used for unloading the tip of the filament immediately after ramming. ");
+    def->sidetext = L("mm/s");
+    def->cli = "filament-unloading-speed-start=f@";
+    def->min = 0;
+    def->default_value = new ConfigOptionFloats { 83. };
+
     def = this->add("filament_toolchange_delay", coFloats);
     def->label = L("Delay after unloading");
     def->tooltip = L("Time to wait after the filament is unloaded. "
diff --git a/xs/src/libslic3r/PrintConfig.hpp b/xs/src/libslic3r/PrintConfig.hpp
index b18603d87..edf7756e8 100644
--- a/xs/src/libslic3r/PrintConfig.hpp
+++ b/xs/src/libslic3r/PrintConfig.hpp
@@ -530,6 +530,7 @@ public:
     ConfigOptionFloats              filament_loading_speed;
     ConfigOptionFloats              filament_load_time;
     ConfigOptionFloats              filament_unloading_speed;
+    ConfigOptionFloats              filament_unloading_speed_start;
     ConfigOptionFloats              filament_toolchange_delay;
     ConfigOptionFloats              filament_unload_time;
     ConfigOptionInts                filament_cooling_moves;
@@ -596,6 +597,7 @@ protected:
         OPT_PTR(filament_loading_speed);
         OPT_PTR(filament_load_time);
         OPT_PTR(filament_unloading_speed);
+        OPT_PTR(filament_unloading_speed_start);
         OPT_PTR(filament_unload_time);
         OPT_PTR(filament_toolchange_delay);
         OPT_PTR(filament_cooling_moves);