Make the increase of extruder motor current during MM filament

exchange sequences configurable.

src/libslic3r/GCode/WipeTowerPrusaMM.cpp

@@ -505,8 +505,9 @@ WipeTower::ToolChangeResult WipeTowerPrusaMM::prime(
 		  .speed_override(100);
 
 	writer.set_initial_position(xy(0.f, 0.f))	// Always move to the starting position
-		.travel(cleaning_box.ld, 7200)
-		.set_extruder_trimpot(750); 			// Increase the extruder driver current to allow fast ramming.
+		.travel(cleaning_box.ld, 7200);
+	if (m_set_extruder_trimpot)
+		writer.set_extruder_trimpot(750); 			// Increase the extruder driver current to allow fast ramming.
 
     for (size_t idx_tool = 0; idx_tool < tools.size(); ++ idx_tool) {
         unsigned int tool = tools[idx_tool];
@@ -533,8 +534,9 @@ WipeTower::ToolChangeResult WipeTowerPrusaMM::prime(
                             // in the output gcode - we should not remember emitting them (we will output them twice in the worst case)
 
 	// Reset the extruder current to a normal value.
-	writer.set_extruder_trimpot(550)
-		  .feedrate(6000)
+	if (m_set_extruder_trimpot)
+		writer.set_extruder_trimpot(550);
+	writer.feedrate(6000)
 		  .flush_planner_queue()
 		  .reset_extruder()
 		  .append("; CP PRIMING END\n"
@@ -607,7 +609,8 @@ WipeTower::ToolChangeResult WipeTowerPrusaMM::tool_change(unsigned int tool, boo
     writer.set_initial_position(initial_position, m_wipe_tower_width, m_wipe_tower_depth, m_internal_rotation);
 
     // Increase the extruder driver current to allow fast ramming.
-    writer.set_extruder_trimpot(750);
+	if (m_set_extruder_trimpot)
+		writer.set_extruder_trimpot(550);
 
     // Ram the hot material out of the melt zone, retract the filament into the cooling tubes and let it cool.
     if (tool != (unsigned int)-1){ 			// This is not the last change.
@@ -635,8 +638,9 @@ WipeTower::ToolChangeResult WipeTowerPrusaMM::tool_change(unsigned int tool, boo
         }
     }
 
-    writer.set_extruder_trimpot(550)    // Reset the extruder current to a normal value.
-          .feedrate(6000)
+	if (m_set_extruder_trimpot)
+		writer.set_extruder_trimpot(550);    // Reset the extruder current to a normal value.
+    writer.feedrate(6000)
           .flush_planner_queue()
           .reset_extruder()
           .append("; CP TOOLCHANGE END\n"
@@ -916,12 +920,10 @@ void WipeTowerPrusaMM::toolchange_Load(
 		  .resume_preview();
 
 	// Reset the extruder current to the normal value.
-	writer.set_extruder_trimpot(550);
+	if (m_set_extruder_trimpot)
+		writer.set_extruder_trimpot(550);
 }
 
-
-
-
 // Wipe the newly loaded filament until the end of the assigned wipe area.
 void WipeTowerPrusaMM::toolchange_Wipe(
 	PrusaMultiMaterial::Writer &writer,

src/libslic3r/GCode/WipeTowerPrusaMM.hpp

@@ -44,7 +44,8 @@ class WipeTowerPrusaMM : public WipeTower
 	// width		-- width of wipe tower in mm ( default 60 mm - leave as it is )
 	// wipe_area	-- space available for one toolchange in mm
 	WipeTowerPrusaMM(float x, float y, float width, float rotation_angle, float cooling_tube_retraction,
-                     float cooling_tube_length, float parking_pos_retraction, float extra_loading_move, float bridging,
+                     float cooling_tube_length, float parking_pos_retraction, float extra_loading_move, 
+                     float bridging, bool set_extruder_trimpot,
                      const std::vector<std::vector<float>>& wiping_matrix, unsigned int initial_tool) :
     m_wipe_tower_pos(x, y),
 		m_wipe_tower_width(width),
@@ -57,6 +58,7 @@ class WipeTowerPrusaMM : public WipeTower
         m_parking_pos_retraction(parking_pos_retraction),
         m_extra_loading_move(extra_loading_move),
 		m_bridging(bridging),
+		m_set_extruder_trimpot(set_extruder_trimpot),
         m_current_tool(initial_tool),
         wipe_volumes(wiping_matrix)
         {}
@@ -212,6 +214,7 @@ class WipeTowerPrusaMM : public WipeTower
     float           m_parking_pos_retraction    = 0.f;
     float           m_extra_loading_move        = 0.f;
     float           m_bridging                  = 0.f;
+    bool            m_set_extruder_trimpot      = false;
     bool            m_adhesion                  = true;
 
 	float m_perimeter_width = 0.4 * Width_To_Nozzle_Ratio; // Width of an extrusion line, also a perimeter spacing for 100% infill.

src/libslic3r/Print.cpp

@@ -213,6 +213,7 @@ bool Print::invalidate_state_by_config_options(const std::vector<t_config_option
             || opt_key == "filament_cooling_final_speed"
             || opt_key == "filament_ramming_parameters"
             || opt_key == "gcode_flavor"
+            || opt_key == "high_current_on_filament_swap"
             || opt_key == "infill_first"
             || opt_key == "single_extruder_multi_material"
             || opt_key == "spiral_vase"
@@ -1768,7 +1769,8 @@ void Print::_make_wipe_tower()
         float(m_config.wipe_tower_width.value),
         float(m_config.wipe_tower_rotation_angle.value), float(m_config.cooling_tube_retraction.value),
         float(m_config.cooling_tube_length.value), float(m_config.parking_pos_retraction.value),
-        float(m_config.extra_loading_move.value), float(m_config.wipe_tower_bridging), wipe_volumes,
+        float(m_config.extra_loading_move.value), float(m_config.wipe_tower_bridging), 
+        m_config.high_current_on_filament_swap.value, wipe_volumes,
         m_wipe_tower_data.tool_ordering.first_extruder());
 
     //wipe_tower.set_retract();

src/libslic3r/PrintConfig.cpp

@@ -925,6 +925,15 @@ void PrintConfigDef::init_fff_params()
     def->mode = comExpert;
     def->default_value = new ConfigOptionEnum<GCodeFlavor>(gcfRepRap);
 
+    def = this->add("high_current_on_filament_swap", coBool);
+    def->label = L("High extruder current on filament swap");
+    def->tooltip = L("It may be beneficial to increase the extruder motor current during the filament exchange"
+                   " sequence to allow for rapid ramming feed rates and to overcome resistance when loading"
+                   " a filament with an ugly shaped tip.");
+    def->cli = "high-current-on-filament-swap!";
+    def->mode = comExpert;
+    def->default_value = new ConfigOptionBool(0);
+
     def = this->add("infill_acceleration", coFloat);
     def->label = L("Infill");
     def->tooltip = L("This is the acceleration your printer will use for infill. Set zero to disable "

src/libslic3r/PrintConfig.hpp

@@ -627,6 +627,7 @@ class GCodeConfig : public StaticPrintConfig
     ConfigOptionBool                variable_layer_height;
     ConfigOptionFloat               cooling_tube_retraction;
     ConfigOptionFloat               cooling_tube_length;
+    ConfigOptionBool                high_current_on_filament_swap;
     ConfigOptionFloat               parking_pos_retraction;
     ConfigOptionBool                remaining_times;
     ConfigOptionBool                silent_mode;
@@ -695,6 +696,7 @@ class GCodeConfig : public StaticPrintConfig
         OPT_PTR(variable_layer_height);
         OPT_PTR(cooling_tube_retraction);
         OPT_PTR(cooling_tube_length);
+        OPT_PTR(high_current_on_filament_swap);
         OPT_PTR(parking_pos_retraction);
         OPT_PTR(remaining_times);
         OPT_PTR(silent_mode);

src/slic3r/GUI/Preset.cpp

@@ -366,7 +366,8 @@ const std::vector<std::string>& Preset::printer_options()
             "host_type", "print_host", "printhost_apikey", "printhost_cafile",
             "single_extruder_multi_material", "start_gcode", "end_gcode", "before_layer_gcode", "layer_gcode", "toolchange_gcode",
             "between_objects_gcode", "printer_vendor", "printer_model", "printer_variant", "printer_notes", "cooling_tube_retraction",
-            "cooling_tube_length", "parking_pos_retraction", "extra_loading_move", "max_print_height", "default_print_profile", "inherits",
+            "cooling_tube_length", "high_current_on_filament_swap", "parking_pos_retraction", "extra_loading_move", "max_print_height", 
+            "default_print_profile", "inherits",
             "remaining_times", "silent_mode", "machine_max_acceleration_extruding", "machine_max_acceleration_retracting",
 			"machine_max_acceleration_x", "machine_max_acceleration_y", "machine_max_acceleration_z", "machine_max_acceleration_e",
         	"machine_max_feedrate_x", "machine_max_feedrate_y", "machine_max_feedrate_z", "machine_max_feedrate_e",

src/slic3r/GUI/Tab.cpp

@@ -2041,6 +2041,7 @@ void TabPrinter::build_extruder_pages()
 		optgroup->append_single_option_line("cooling_tube_length");
 		optgroup->append_single_option_line("parking_pos_retraction");
         optgroup->append_single_option_line("extra_loading_move");
+        optgroup->append_single_option_line("high_current_on_filament_swap");
 		m_pages.insert(m_pages.end() - n_after_single_extruder_MM, page);
 		m_has_single_extruder_MM_page = true;
 	}