PrusaSlicer 2.4.0 with Dribbling C01 inside

README.md

@@ -1,11 +1,43 @@
 
 ![PrusaSlicer logo](/resources/icons/PrusaSlicer.png?raw=true)
 
-# PrusaSlicer
+# PrusaSlicer 2.4.0 DRIBBLING V.B01
 
+This is a Fork of the PrusaSlicer 2.4.0
 You may want to check the [PrusaSlicer project page](https://www.prusa3d.com/prusaslicer/).
 Prebuilt Windows, OSX and Linux binaries are available through the [git releases page](https://github.com/prusa3d/PrusaSlicer/releases) or from the [Prusa3D downloads page](https://www.prusa3d.com/drivers/). There are also [3rd party Linux builds available](https://github.com/prusa3d/PrusaSlicer/wiki/PrusaSlicer-on-Linux---binary-distributions).
 
+## What are the PrusaSlicer's DRIBBLING features compared to the original PrusaSlicer?
+
+PrusaSlicer DRIBBLING version **is capable to produce better filament tips during MMU2 filament change with wipe tower, and to handle transitions from materials with different melting temperatures in multicolor mode (e.g. PLA to PETG, PLA to ABS, etc.)**
+I had developed it especially for PLA filaments, in order to use bad quality / low cost filaments spools with MMU2.
+
+### Where are those features ?
+
+On the `Print settings` tab, selecting Multiple Extruders on the left, you can find a new checkbox in Advanced group:
+
+- **DRIBBLING MODE** (on/off) -> if you do not enable dribbling mode, it works exactly as the standard PrusaSlicer.
+If Dribbling mode is enabled, during the MMU2S filament change, just before extracting the filament, it plays with the filament doing a sort of dribbling and each hit of the filament in the melting area shapes the head almost squared, limiting the strings and strange big balls shapes to the minimum.
+
+On the `Filament settings` tab, there are 3 new fields in the Temperature group:
+
+- **MANUFACTURER MIN TEMP° and MAX TEMP°** ->  Those are the manufacturer printing specification **temperature** (in C°) of the filament, normally printed on the roll.
+Normally under the MIN TEMP the filament does not melt, and over the MAX TEMP the filament degrades or burn.
+
+- **DRIBBLING TIP SHAPE** temperature -> This is the ideal **temperature** (in C°) at which the tip shaping comes better. It is a matter of experimentation, and each filament could be different.
+
+On the `Filament settings` tab, selecting Advanced on the left, you can find a new parameter in Toolchange Parameters with single extruder MM printers group:
+
+- **NUMBER OF DRIBBLING MOVES** -> This number represent how many times the filament is Dribbled up and down hitting the melted area to perform the perfect tip shape. A reasonable number is between 1 and 4.
+
+On the `Printer settings` tab, selecting Single Extruder MM setup on the left, you can find a new parameter:
+
+- **MELTING DISTANCE** (do not change) -> It represents how many mm the filament is dropped down from the rest position to just hit the melted area. This should allow to just hit the melted surface and not going deep into it.
+
+
+*See a close-up picture of some filament heads  I got during a MMU2 multicolour print.*
+![heads](/heads.jpg?raw=true)
+
 PrusaSlicer takes 3D models (STL, OBJ, AMF) and converts them into G-code
 instructions for FFF printers or PNG layers for mSLA 3D printers. It's
 compatible with any modern printer based on the RepRap toolchain, including all

src/libslic3r/GCode/WipeTower.cpp

@@ -321,6 +321,19 @@ class WipeTowerWriter
 		return *this;
     }
 
+// dribbling
+   // Wait for a period of time (milliseconds).
+	WipeTowerWriter& waitmills(float time)
+	{
+        if (time==0)
+            return *this;
+		char buf[128];
+		sprintf(buf, "G4 P%.3f\n", time);
+		m_gcode += buf;
+		return *this;
+	};
+// dribbling
+
 	// Set speed factor override percentage.
 	WipeTowerWriter& speed_override(int speed)
 	{
@@ -527,6 +540,7 @@ WipeTower::WipeTower(const PrintConfig& config, const std::vector<std::vector<fl
         m_parking_pos_retraction  = float(config.parking_pos_retraction);
         m_extra_loading_move      = float(config.extra_loading_move);
         m_set_extruder_trimpot    = config.high_current_on_filament_swap;
+        m_dribbling_enabled       = bool(config.dribbling_enabled.value);
     }
     // Calculate where the priming lines should be - very naive test not detecting parallelograms etc.
     const std::vector<Vec2d>& bed_points = config.bed_shape.values;
@@ -574,6 +588,13 @@ void WipeTower::set_extruder(size_t idx, const PrintConfig& config)
         m_filpar[idx].cooling_moves           = config.filament_cooling_moves.get_at(idx);
         m_filpar[idx].cooling_initial_speed   = float(config.filament_cooling_initial_speed.get_at(idx));
         m_filpar[idx].cooling_final_speed     = float(config.filament_cooling_final_speed.get_at(idx));
+// dribbling
+        m_filpar[idx].dribbling_meltingzone   = float(config.dribbling_meltingzone);
+        m_filpar[idx].dribbling_moves         = int(config.dribbling_moves.get_at(idx));
+        m_filpar[idx].dribbling_temperature   = int(config.dribbling_temperature.get_at(idx));
+        m_filpar[idx].filament_mintemp        = int(config.filament_mintemp.get_at(idx));
+        m_filpar[idx].filament_maxtemp        = int(config.filament_maxtemp.get_at(idx));
+// dribbling
     }
 
     m_filpar[idx].filament_area = float((M_PI/4.f) * pow(config.filament_diameter.get_at(idx), 2)); // all extruders are assumed to have the same filament diameter at this point
@@ -757,6 +778,40 @@ WipeTower::ToolChangeResult WipeTower::tool_change(size_t tool)
     if (tool != (unsigned int)-1){ 			// This is not the last change.
         toolchange_Unload(writer, cleaning_box, m_filpar[m_current_tool].material,
                           is_first_layer() ? m_filpar[tool].first_layer_temperature : m_filpar[tool].temperature);
+// dribbling
+
+                unsigned int common_temp_L;
+                unsigned int common_temp_H;
+                if ((m_semm == true) && (m_dribbling_enabled == true))
+                    {
+                    if (m_filpar[m_current_tool].filament_maxtemp > m_filpar[tool].filament_maxtemp)
+                        { common_temp_L = m_filpar[m_current_tool].filament_mintemp;
+                          common_temp_H = m_filpar[tool].filament_maxtemp;
+                        }
+                    else
+                    if (m_filpar[m_current_tool].filament_maxtemp > m_filpar[tool].filament_mintemp)
+                      {
+                        common_temp_L = m_filpar[tool].filament_mintemp;
+                        common_temp_H = m_filpar[m_current_tool].filament_maxtemp;
+                      }
+                    else
+                    {
+                        // cleaning filament required....
+                        common_temp_L = m_filpar[tool].filament_mintemp;
+                        common_temp_H = m_filpar[tool].filament_mintemp;
+                     }
+                }
+
+				toolchange_Change(writer, tool, m_filpar[tool].material); // Change the tool, set a speed override for soluble and flex materials.
+
+// dribbling
+				if ((m_semm == true) && (m_dribbling_enabled == true)) {
+    	    writer.append(";--------------------\n"
+		    		            "; SET COMMON TEMPERATURE to use between two different materials\n");
+					writer.comment_with_value(" Common flushing temperature =", common_temp_H);
+					writer.set_extruder_temp(common_temp_H, true);
+					writer.append(";--------------------\n");
+			  }
         toolchange_Change(writer, tool, m_filpar[tool].material); // Change the tool, set a speed override for soluble and flex materials.
         toolchange_Load(writer, cleaning_box);
         writer.travel(writer.x(), writer.y()-m_perimeter_width); // cooling and loading were done a bit down the road
@@ -776,6 +831,12 @@ WipeTower::ToolChangeResult WipeTower::tool_change(size_t tool)
           .append("; CP TOOLCHANGE END\n"
                   ";------------------\n"
                   "\n\n");
+// dribbling
+           if ((m_semm == true) && (m_dribbling_enabled == true)) {
+              writer.append(";------ SET AGAIN CORRECT LAYER TEMP --------------\n");
+              writer.set_extruder_temp(is_first_layer() ? m_filpar[m_current_tool].first_layer_temperature : m_filpar[m_current_tool].temperature, false);
+           }
+// dribbling ***
 
     // Ask our writer about how much material was consumed:
     if (m_current_tool < m_used_filament_length.size())
@@ -840,6 +901,13 @@ void WipeTower::toolchange_Unload(
 
     writer.disable_linear_advance();
 
+    if ((m_semm == true) && (m_dribbling_enabled == true)) {
+    	 writer.append(";--------------------\n"
+                       "; SET DRIBBLING SHAPING TEMPERATURE\n");
+         writer.set_extruder_temp(m_filpar[m_current_tool].dribbling_temperature, false);
+    	 writer.append(";--------------------\n");
+    }
+
     // now the ramming itself:
     while (i < m_filpar[m_current_tool].ramming_speed.size())
     {
@@ -869,12 +937,88 @@ void WipeTower::toolchange_Unload(
     float turning_point = (!m_left_to_right ? xl : xr );
     if (m_semm && (m_cooling_tube_retraction != 0 || m_cooling_tube_length != 0)) {
         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()
+        if ((m_semm == false) || (m_dribbling_enabled == false)) {
+            writer.append("; START PRUSA standard Retraction GCODE\n");
+            writer.suppress_preview()
               .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)
               .resume_preview();
+            writer.append("; END Retraction GCODE\n");
+        }
+		else
+		{
+            writer.append(";--------------------\n"
+                          "; START Dribbling GCODE\n");
+			writer.suppress_preview();
+
+			// go to the left border
+			writer.travel(xl, writer.y());
+			old_x = writer.x();
+			turning_point = xr - old_x > old_x - xl ? xr : xl;
+
+			float dribbling_meltingzone = m_filpar[m_current_tool].dribbling_meltingzone; // from the end of PTFE Tube
+			int   dribbling_moves = m_filpar[m_current_tool].dribbling_moves;
+			int   dribbling_temperature = m_filpar[m_current_tool].dribbling_temperature;
+			int   filament_mintemp = m_filpar[m_current_tool].filament_mintemp;
+			int   filament_maxtemp = m_filpar[m_current_tool].filament_maxtemp;
+			float dribbling_distance = dribbling_meltingzone * 3.f;   // 25mm
+
+			int   dribbling_tictac = 50;
+			float dr_offset = 2.0f; //  initial break dribbling distance
+			float speed = m_filpar[m_current_tool].cooling_initial_speed;
+
+            // dribbling
+			/*
+			// Extract inital
+			for (int i = 0; i < dribbling_tictac; ++i) {
+				writer.retract(0.10f * dr_offset, 0.40f * m_filpar[m_current_tool].unloading_speed_start * 60.f) // feedrate 5000mm/min = 83mm/s
+					  .retract(0.20f * dr_offset, 0.30f * m_filpar[m_current_tool].unloading_speed_start * 60.f) // feedrate 5000mm/min = 83mm/s
+					  .retract(0.30f * dr_offset, 0.20f * m_filpar[m_current_tool].unloading_speed_start * 60.f) // feedrate 5000mm/min = 83mm/s
+					  .retract(0.40f * dr_offset, 0.10f * m_filpar[m_current_tool].unloading_speed_start * 60.f) // feedrate 5000mm/min = 83mm/s
+					  .waitmills(10);
+
+				writer.retract(-0.40f * dr_offset, 0.10f * m_filpar[m_current_tool].unloading_speed_start * 60.f) // feedrate 5000mm/min = 83mm/s
+					  .retract(-0.30f * dr_offset, 0.20f * m_filpar[m_current_tool].unloading_speed_start * 60.f) // feedrate 5000mm/min = 83mm/s
+					  .retract(-0.20f * dr_offset, 0.30f * m_filpar[m_current_tool].unloading_speed_start * 60.f) // feedrate 5000mm/min = 83mm/s
+					  .retract(-0.10f * dr_offset, 0.40f * m_filpar[m_current_tool].unloading_speed_start * 60.f) // feedrate 5000mm/min = 83mm/s
+					  .waitmills(10);
+			}
+			*/
+			writer.retract(0.40f * dribbling_distance, m_filpar[m_current_tool].unloading_speed_start * 60.f) // feedrate 5000mm/min = 83mm/s
+                  .retract(0.30f * dribbling_distance, 1.0f * m_filpar[m_current_tool].unloading_speed * 60.f)
+                  .retract(0.20f * dribbling_distance, 0.5f * m_filpar[m_current_tool].unloading_speed * 60.f)
+                  .retract(0.10f * dribbling_distance, 0.3f * m_filpar[m_current_tool].unloading_speed * 60.f);
+
+            writer.load_move_x_advanced(turning_point, -(dribbling_distance / 2), speed * 0.40f);
+            writer.load_move_x_advanced(old_x, (dribbling_distance / 2), speed * 0.40f);
+
+			for (int i = 0; i < dribbling_moves; ++i) {
+				for (int j = 0; j < 1; ++j) {
+					// Insert 1
+					writer.retract(-0.10f * dribbling_distance, 0.3f * m_filpar[m_current_tool].unloading_speed * 60.f)
+						  .retract(-0.20f * dribbling_distance, 0.5f * m_filpar[m_current_tool].unloading_speed * 60.f)
+						  .retract(-0.30f * dribbling_distance, 1.0f * m_filpar[m_current_tool].unloading_speed * 60.f)
+						  .retract(-0.40f * dribbling_distance, m_filpar[m_current_tool].unloading_speed_start * 60.f) // feedrate 5000mm/min = 83mm/s
+						  .waitmills(100)
+
+						// Extract 2
+						  .retract(0.40f * dribbling_distance, m_filpar[m_current_tool].unloading_speed_start * 60.f) // feedrate 5000mm/min = 83mm/s
+						  .retract(0.30f * dribbling_distance, 1.0f * m_filpar[m_current_tool].unloading_speed * 60.f)
+						  .retract(0.20f * dribbling_distance, 0.5f * m_filpar[m_current_tool].unloading_speed * 60.f)
+						  .retract(0.10f * dribbling_distance, 0.3f * m_filpar[m_current_tool].unloading_speed * 60.f)
+						  .waitmills(500);
+				}
+				writer.append("; ---\n");
+			}
+
+			float total_dribbling_distance = m_cooling_tube_retraction + (m_cooling_tube_length / 2.f) - 15.f - dribbling_distance; // the 15mm is reserved for the first part after ramming
+			writer.retract(total_dribbling_distance, 0.3f * m_filpar[m_current_tool].unloading_speed * 60.f)
+			      .resume_preview();
+			writer.append("; END Dribbling GCODE\n"
+		                ";----------------------\n");
+		}
     }
     // Wipe tower should only change temperature with single extruder MM. Otherwise, all temperatures should
     // be already set and there is no need to change anything. Also, the temperature could be changed
@@ -908,6 +1052,18 @@ void WipeTower::toolchange_Unload(
         }
     }
 
+    // Wipe tower should only change temperature with single extruder MM. Otherwise, all temperatures should
+    // be already set and there is no need to change anything. Also, the temperature could be changed
+    // for wrong extruder.
+    if ((m_semm) && (m_dribbling_enabled == false)) {
+        if (new_temperature != 0 && (new_temperature != m_old_temperature || is_first_layer()) ) { 	// Set the extruder temperature, but don't wait.
+            // If the required temperature is the same as last time, don't emit the M104 again (if user adjusted the value, it would be reset)
+            // However, always change temperatures on the first layer (this is to avoid issues with priming lines turned off).
+            writer.set_extruder_temp(new_temperature, false);
+            m_old_temperature = new_temperature;
+        }
+    }
+
     // let's wait is necessary:
     writer.wait(m_filpar[m_current_tool].delay);
     // we should be at the beginning of the cooling tube again - let's move to parking position:

src/libslic3r/GCode/WipeTower.hpp

@@ -229,6 +229,13 @@ class WipeTower
         std::vector<float>  ramming_speed;
         float               nozzle_diameter;
         float               filament_area;
+// dribbling
+        float				dribbling_meltingzone = 8.f ;
+		int					dribbling_moves = 1 ;
+		int					dribbling_temperature = 0 ;
+		int					filament_mintemp = 0 ;
+		int					filament_maxtemp = 0 ;
+// dribbling
     };
 
 private:
@@ -261,6 +268,7 @@ class WipeTower
     float  m_travel_speed       = 0.f;
     float  m_first_layer_speed  = 0.f;
     size_t m_first_layer_idx    = size_t(-1);
+    bool   m_dribbling_enabled = false;
 
 	// G-code generator parameters.
     float           m_cooling_tube_retraction   = 0.f;

src/libslic3r/Preset.cpp

@@ -441,7 +441,7 @@ static std::vector<std::string> s_Preset_print_options {
     "support_material_buildplate_only", "dont_support_bridges", "thick_bridges", "notes", "complete_objects", "extruder_clearance_radius",
     "extruder_clearance_height", "gcode_comments", "gcode_label_objects", "output_filename_format", "post_process", "perimeter_extruder",
     "infill_extruder", "solid_infill_extruder", "support_material_extruder", "support_material_interface_extruder",
-    "ooze_prevention", "standby_temperature_delta", "interface_shells", "extrusion_width", "first_layer_extrusion_width",
+    "ooze_prevention", "standby_temperature_delta", "interface_shells", "dribbling_enabled", "extrusion_width", "first_layer_extrusion_width",
     "perimeter_extrusion_width", "external_perimeter_extrusion_width", "infill_extrusion_width", "solid_infill_extrusion_width",
     "top_infill_extrusion_width", "support_material_extrusion_width", "infill_overlap", "infill_anchor", "infill_anchor_max", "bridge_flow_ratio", "clip_multipart_objects",
     "elefant_foot_compensation", "xy_size_compensation", "threads", "resolution", "gcode_resolution", "wipe_tower", "wipe_tower_x", "wipe_tower_y",
@@ -451,9 +451,19 @@ static std::vector<std::string> s_Preset_print_options {
 
 static std::vector<std::string> s_Preset_filament_options {
     "filament_colour", "filament_diameter", "filament_type", "filament_soluble", "filament_notes", "filament_max_volumetric_speed",
-    "extrusion_multiplier", "filament_density", "filament_cost", "filament_spool_weight", "filament_loading_speed", "filament_loading_speed_start", "filament_load_time",
+    "extrusion_multiplier", "filament_density", "filament_cost",
+// dribbling
+		"filament_mintemp",
+		"filament_maxtemp",
+// dribbling
+    "filament_spool_weight", "filament_loading_speed", "filament_loading_speed_start", "filament_load_time",
     "filament_unloading_speed", "filament_unloading_speed_start", "filament_unload_time", "filament_toolchange_delay", "filament_cooling_moves",
-    "filament_cooling_initial_speed", "filament_cooling_final_speed", "filament_ramming_parameters", "filament_minimal_purge_on_wipe_tower",
+    "filament_cooling_initial_speed", "filament_cooling_final_speed",
+// dribbling start
+		"dribbling_moves",
+		"dribbling_temperature",
+// dribbling end
+    "filament_ramming_parameters", "filament_minimal_purge_on_wipe_tower",
     "temperature", "first_layer_temperature", "bed_temperature", "first_layer_bed_temperature", "fan_always_on", "cooling", "min_fan_speed",
     "max_fan_speed", "bridge_fan_speed", "disable_fan_first_layers", "full_fan_speed_layer", "fan_below_layer_time", "slowdown_below_layer_time", "min_print_speed",
     "start_filament_gcode", "end_filament_gcode",
@@ -481,7 +491,7 @@ static std::vector<std::string> s_Preset_printer_options {
     "single_extruder_multi_material", "start_gcode", "end_gcode", "before_layer_gcode", "layer_gcode", "toolchange_gcode",
     "color_change_gcode", "pause_print_gcode", "template_custom_gcode",
     "between_objects_gcode", "printer_vendor", "printer_model", "printer_variant", "printer_notes", "cooling_tube_retraction",
-    "cooling_tube_length", "high_current_on_filament_swap", "parking_pos_retraction", "extra_loading_move", "max_print_height",
+    "cooling_tube_length", "high_current_on_filament_swap", "parking_pos_retraction", "extra_loading_move", "dribbling_meltingzone", "max_print_height",
     "default_print_profile", "inherits",
     "remaining_times", "silent_mode",
     "machine_limits_usage", "thumbnails"