ENH: support tpu for multi_extruder

jira: none
Change-Id: I556804aadac00406e7214b86f7925170a90c55ce

src/libslic3r/GCode/ToolOrdering.cpp

@@ -474,6 +474,52 @@ void ToolOrdering::collect_extruders(const PrintObject &object, const std::vecto
     }
 }
 
+std::set<int> ToolOrdering::get_tpu_filaments() const
+{
+    std::vector<unsigned int> all_filaments;
+    for (const auto &lt : m_layer_tools) {
+        append(all_filaments, lt.extruders);
+        sort_remove_duplicates(all_filaments);
+    }
+
+    std::set<int> tpu_filaments;
+    for (unsigned int filament_id : all_filaments) {
+        std::string filament_name = m_print->config().filament_type.get_at(filament_id);
+        if (filament_name == "TPU") {
+            tpu_filaments.insert(filament_id);
+        }
+    }
+
+    return tpu_filaments;
+}
+
+bool ToolOrdering::check_tpu_group(std::vector<int> filament_maps) const
+{
+    std::vector<unsigned int> all_filaments;
+    for (const auto &lt : m_layer_tools) {
+        append(all_filaments, lt.extruders);
+        sort_remove_duplicates(all_filaments);
+    }
+
+    int check_extruder_id = -1;
+    std::map<int, std::vector<int>> extruder_filament_nums;
+    for (unsigned int filament_id : all_filaments) {
+        int extruder_id = filament_maps[filament_id];
+        extruder_filament_nums[extruder_id].push_back(filament_id);
+
+        std::string filament_name = m_print->config().filament_type.get_at(filament_id);
+        if (filament_name == "TPU") {
+            check_extruder_id = filament_maps[filament_id];
+        }
+
+        if (check_extruder_id != -1 && (extruder_filament_nums[check_extruder_id].size() > 1)) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
 // Reorder extruders to minimize layer changes.
 void ToolOrdering::reorder_extruders(unsigned int last_extruder_id)
 {
@@ -902,6 +948,18 @@ void ToolOrdering::reorder_extruders_for_minimum_flush_volume(bool reorder_first
 
     using FlushMatrix = std::vector<std::vector<float>>;
     size_t             nozzle_nums = print_config->nozzle_diameter.values.size();
+
+    std::vector<std::set<int>> extruder_tpu_status(2, std::set<int>());
+    if (nozzle_nums > 1) {
+        std::set<int> tpu_filaments = get_tpu_filaments();
+        if (tpu_filaments.size() > 1) {
+            throw Slic3r::RuntimeError(std::string("Only supports up to one TPU filament."));
+        }
+
+        // todo multi_exturder: Need to determine whether the TPU can be placed on the left or right head according to the print model.
+        extruder_tpu_status[0] = tpu_filaments;
+    }
+
     std::vector<FlushMatrix> nozzle_flush_mtx;
     for (size_t nozzle_id = 0; nozzle_id < nozzle_nums; ++nozzle_id) {
         std::vector<float> flush_matrix(cast<float>(get_flush_volumes_matrix(print_config->flush_volumes_matrix.values, nozzle_id, nozzle_nums)));
@@ -937,6 +995,15 @@ void ToolOrdering::reorder_extruders_for_minimum_flush_volume(bool reorder_first
             m_print->update_filament_maps_to_config(filament_maps);
         }
         std::transform(filament_maps.begin(), filament_maps.end(), filament_maps.begin(), [](int value) { return value - 1; });
+
+        if (!check_tpu_group(filament_maps)) {
+            if (map_mode == FilamentMapMode::fmmManual) {
+                throw Slic3r::RuntimeError(std::string("Manual grouping error: TPU can only be placed in a nozzle alone."));
+            }
+            else {
+                throw Slic3r::RuntimeError(std::string("Auto grouping error: TPU can only be placed in a nozzle alone."));
+            }
+        }
     }
 
     std::vector<std::vector<unsigned int>>filament_sequences;

src/libslic3r/GCode/ToolOrdering.hpp

@@ -238,6 +238,9 @@ private:
     void				initialize_layers(std::vector<coordf_t> &zs);
     void 				collect_extruders(const PrintObject &object, const std::vector<std::pair<double, unsigned int>> &per_layer_extruder_switches);
     void				reorder_extruders(unsigned int last_extruder_id);
+    std::set<int>       get_tpu_filaments() const;
+    bool                check_tpu_group(std::vector<int> filament_maps) const;
+
     // BBS
     void                reorder_extruders(std::vector<unsigned int> tool_order_layer0);
     void 				fill_wipe_tower_partitions(const PrintConfig &config, coordf_t object_bottom_z, coordf_t max_layer_height);

src/libslic3r/GCode/WipeTower.cpp

@@ -616,7 +616,8 @@ WipeTower::WipeTower(const PrintConfig& config, int plate_idx, Vec3d plate_origi
     //wipe_volumes(flush_matrix)
     m_wipe_volume(prime_volume),
     m_enable_timelapse_print(config.timelapse_type.value == TimelapseType::tlSmooth),
-    m_nozzle_change_length(config.extruder_change_length.get_at(0))
+    m_nozzle_change_length(config.extruder_change_length.get_at(0)),
+    m_is_multi_extruder(config.nozzle_diameter.size() > 1)
 {
     // Read absolute value of first layer speed, if given as percentage,
     // it is taken over following default. Speeds from config are not
@@ -831,7 +832,37 @@ WipeTower::ToolChangeResult WipeTower::tool_change(size_t tool, bool extrude_per
         // BBS
         //writer.travel(writer.x(), writer.y()-m_perimeter_width); // cooling and loading were done a bit down the road
 
-        // ensure travel to initial_positoin
+        if (m_is_multi_extruder && is_tpu_filament(tool)) {
+            float dy                  = 2 * m_perimeter_width;
+            float nozzle_change_speed = 60.0f * m_filpar[tool].max_e_speed / m_extrusion_flow;
+            nozzle_change_speed *= 0.25;
+
+            const float &xl = cleaning_box.ld.x();
+            const float &xr = cleaning_box.rd.x();
+
+            Vec2f start_pos = m_nozzle_change_result.start_pos + Vec2f(0, m_perimeter_width);
+            bool   left_to_right     = true;
+            double tpu_travel_length = 5;
+            double e_flow            = extrusion_flow(0.2);
+            double length            = tpu_travel_length / e_flow;
+            int    tpu_line_count    = length / (m_wipe_tower_width - 2 * m_perimeter_width) + 1;
+
+            writer.travel(start_pos);
+
+            for (int i = 0; true; ++i) {
+                if (left_to_right)
+                    writer.travel(xr - m_perimeter_width, writer.y(), nozzle_change_speed);
+                else
+                    writer.travel(xl + m_perimeter_width, writer.y(), nozzle_change_speed);
+
+                if (i == tpu_line_count - 1)
+                    break;
+
+                writer.travel(writer.x(), writer.y() + dy);
+                left_to_right = !left_to_right;
+            }
+        }
+
         {
             writer.travel(initial_position - Vec2f(0.5, 0.5));
             writer.travel(initial_position);
@@ -897,19 +928,22 @@ WipeTower::ToolChangeResult WipeTower::tool_change(size_t tool, bool extrude_per
 
 WipeTower::NozzleChangeResult WipeTower::nozzle_change(int old_filament_id, int new_filament_id)
 {
-    float wipe_depth   = 0.f;
-    float wipe_length  = 0.f;
-    float purge_volume = 0.f;
-    int nozzle_change_line_count = 0;
+    float wipe_depth               = 0.f;
+    float wipe_length              = 0.f;
+    float purge_volume             = 0.f;
+    int   nozzle_change_line_count = 0;
 
     // Finds this toolchange info
     if (new_filament_id != (unsigned int) (-1)) {
         for (const auto &b : m_layer_info->tool_changes)
             if (b.new_tool == new_filament_id) {
-                wipe_length  = b.wipe_length;
-                wipe_depth   = b.required_depth;
-                purge_volume = b.purge_volume;
-                nozzle_change_line_count = (b.nozzle_change_depth + WT_EPSILON) / m_perimeter_width;
+                wipe_length              = b.wipe_length;
+                wipe_depth               = b.required_depth;
+                purge_volume             = b.purge_volume;
+                if (has_tpu_filament())
+                    nozzle_change_line_count = ((b.nozzle_change_depth + WT_EPSILON) / m_perimeter_width + 1) / 2;
+                else
+                    nozzle_change_line_count = (b.nozzle_change_depth + WT_EPSILON) / m_perimeter_width;
                 break;
             }
     } else {
@@ -917,7 +951,7 @@ WipeTower::NozzleChangeResult WipeTower::nozzle_change(int old_filament_id, int
     }
 
     float nozzle_change_speed = 60.0f * m_filpar[m_current_tool].max_e_speed / m_extrusion_flow;
-    if (m_filpar[m_current_tool].material == "TPU") {
+    if (is_tpu_filament(m_current_tool)) {
         nozzle_change_speed *= 0.25;
     }
 
@@ -932,8 +966,7 @@ WipeTower::NozzleChangeResult WipeTower::nozzle_change(int old_filament_id, int
     writer.speed_override_backup();
     writer.speed_override(100);
 
-    box_coordinates cleaning_box(Vec2f(m_perimeter_width, m_perimeter_width),
-                                 m_wipe_tower_width - 2 * m_perimeter_width,
+    box_coordinates cleaning_box(Vec2f(m_perimeter_width, m_perimeter_width), m_wipe_tower_width - 2 * m_perimeter_width,
                                  (new_filament_id != (unsigned int) (-1) ? wipe_depth + m_depth_traversed - m_perimeter_width : m_wipe_tower_depth - m_perimeter_width));
 
     Vec2f initial_position = cleaning_box.ld + Vec2f(0.f, m_depth_traversed);
@@ -945,7 +978,9 @@ WipeTower::NozzleChangeResult WipeTower::nozzle_change(int old_filament_id, int
     const float &xl = cleaning_box.ld.x();
     const float &xr = cleaning_box.rd.x();
 
-    float dy        = m_layer_info->extra_spacing * m_perimeter_width;
+    float dy = m_layer_info->extra_spacing * m_perimeter_width;
+    if (has_tpu_filament())
+        dy = 2 * m_perimeter_width;
 
     float start_y = writer.y();
 
@@ -972,35 +1007,60 @@ WipeTower::NozzleChangeResult WipeTower::nozzle_change(int old_filament_id, int
 
     writer.set_extrusion_flow(m_extrusion_flow); // Reset the extrusion flow.
 
-    m_depth_traversed += (nozzle_change_line_count) * dy;
+    m_depth_traversed += (nozzle_change_line_count - 1) *dy + m_perimeter_width;
 
-    auto float_to_string_with_precision = [](float value, int precision) {
-        std::ostringstream out;
-        out << std::fixed << std::setprecision(precision) << value;
-        return out.str();
-    };
 
-    float wipe_distance = 2;
-    Vec2f wipe_pos = writer.pos();
-    if (m_left_to_right) {
-        wipe_pos.x() -= wipe_distance;
+    if (is_tpu_filament(m_current_tool))
+    {
+        bool left_to_right = !m_left_to_right;
+        double tpu_travel_length        = 5;
+        double e_flow                   = extrusion_flow(0.2);
+        double length                   = tpu_travel_length / e_flow;
+        int    tpu_line_count = length / (m_wipe_tower_width - 2 * m_perimeter_width) + 1;
+
+        writer.travel(writer.x(), writer.y() - m_perimeter_width);
+
+        for (int i = 0; true; ++i) {
+            if (left_to_right)
+                writer.travel(xr - m_perimeter_width, writer.y(), nozzle_change_speed);
+            else
+                writer.travel(xl + m_perimeter_width, writer.y(), nozzle_change_speed);
+
+            if (i == tpu_line_count - 1)
+                break;
+
+            writer.travel(writer.x(), writer.y() - dy);
+            left_to_right = !left_to_right;
+        }
     }
     else {
-        wipe_pos.x() += wipe_distance;
-    }
-    writer.append("; WIPE_START\n");
-    writer.extrude_explicit(wipe_pos, -2);
-    writer.append("; WIPE_END\n");
+        auto float_to_string_with_precision = [](float value, int precision) {
+            std::ostringstream out;
+            out << std::fixed << std::setprecision(precision) << value;
+            return out.str();
+        };
 
-    std::string lift_gcode = "G2 Z" + float_to_string_with_precision(m_z_pos + 0.4, 3) + " I0.86 J0.86 P1 F10000\n";
-    writer.append(lift_gcode);
+        float wipe_distance = 2;
+        Vec2f wipe_pos      = writer.pos();
+        if (m_left_to_right) {
+            wipe_pos.x() -= wipe_distance;
+        } else {
+            wipe_pos.x() += wipe_distance;
+        }
+        writer.append("; WIPE_START\n");
+        writer.extrude_explicit(wipe_pos, -2);
+        writer.append("; WIPE_END\n");
+
+        std::string lift_gcode = "G2 Z" + float_to_string_with_precision(m_z_pos + 0.4, 3) + " I0.86 J0.86 P1 F10000\n";
+        writer.append(lift_gcode);
+    }
 
     writer.append("; Nozzle change end\n");
 
     NozzleChangeResult result;
-    result.start_pos    = writer.start_pos_rotated();
-    result.end_pos      = writer.pos();
-    result.gcode        = std::move(writer.gcode());
+    result.start_pos = initial_position;
+    result.end_pos   = writer.pos();
+    result.gcode     = std::move(writer.gcode());
     return result;
 }
 
@@ -1565,7 +1625,10 @@ void WipeTower::plan_toolchange(float z_par, float layer_height_par, unsigned in
         double e_flow                   = extrusion_flow(0.2);
         double length                   = m_nozzle_change_length / e_flow;
         int    nozzle_change_line_count = length / (m_wipe_tower_width - m_perimeter_width) + 1;
-        nozzle_change_depth             = nozzle_change_line_count * m_perimeter_width;
+        if (has_tpu_filament())
+            nozzle_change_depth = (2 * nozzle_change_line_count - 1) * m_perimeter_width;
+        else
+            nozzle_change_depth = nozzle_change_line_count * m_perimeter_width;
         depth += nozzle_change_depth;
     }
     WipeTowerInfo::ToolChange tool_change = WipeTowerInfo::ToolChange(old_tool, new_tool, depth, 0.f, 0.f, wipe_volume, length_to_extrude, purge_volume);
@@ -1620,7 +1683,7 @@ void WipeTower::plan_tower()
         if (m_enable_timelapse_print && max_depth < EPSILON)
             max_depth = min_wipe_tower_depth;
 
-        if (max_depth + EPSILON < min_wipe_tower_depth)
+        if (max_depth + EPSILON < min_wipe_tower_depth && !has_tpu_filament())
             m_extra_spacing = min_wipe_tower_depth / max_depth;
         else
             m_extra_spacing = 1.f;
@@ -1723,6 +1786,10 @@ void WipeTower::save_on_last_wipe()
     }
 }
 
+bool WipeTower::is_tpu_filament(int filament_id) const
+{
+    return m_filpar[filament_id].material == "TPU";
+}
 
 // BBS: consider both soluable and support properties
 // Return index of first toolchange that switches to non-soluble and non-support extruder

src/libslic3r/GCode/WipeTower.hpp

@@ -259,6 +259,9 @@ public:
 
 	void set_filament_map(const std::vector<int> &filament_map) { m_filament_map = filament_map; }
 
+	void set_has_tpu_filament(bool has_tpu) { m_has_tpu_filament = has_tpu; }
+    bool has_tpu_filament() const { return m_has_tpu_filament; }
+
     struct FilamentParameters {
         std::string 	    material = "PLA";
         bool                is_soluble = false;
@@ -320,6 +323,8 @@ private:
     size_t       m_cur_layer_id;
     NozzleChangeResult m_nozzle_change_result;
     std::vector<int>   m_filament_map;
+    bool               m_has_tpu_filament{false};
+    bool               m_is_multi_extruder{false};
 
 	// G-code generator parameters.
     // BBS: remove useless config
@@ -385,6 +390,8 @@ private:
     // Goes through m_plan, calculates border and finish_layer extrusions and subtracts them from last wipe
     void save_on_last_wipe();
 
+	bool is_tpu_filament(int filament_id) const;
+
 	// BBS
 	box_coordinates align_perimeter(const box_coordinates& perimeter_box);
 

src/libslic3r/Print.cpp

@@ -67,6 +67,17 @@ void Print::clear()
     m_statistics_by_extruder_count.clear();
 }
 
+bool Print::has_tpu_filament() const
+{
+    for (unsigned int filament_id : m_wipe_tower_data.tool_ordering.all_extruders()) {
+        std::string filament_name = m_config.filament_type.get_at(filament_id);
+        if (filament_name == "TPU") {
+            return true;
+        }
+    }
+    return false;
+}
+
 // Called by Print::apply().
 // This method only accepts PrintConfig option keys.
 bool Print::invalidate_state_by_config_options(const ConfigOptionResolver & /* new_config */, const std::vector<t_config_option_key> &opt_keys)
@@ -2458,7 +2469,7 @@ void Print::_make_wipe_tower()
     // BBS: in BBL machine, wipe tower is only use to prime extruder. So just use a global wipe volume.
     WipeTower wipe_tower(m_config, m_plate_index, m_origin, m_config.prime_volume, m_wipe_tower_data.tool_ordering.first_extruder(),
         m_wipe_tower_data.tool_ordering.empty() ? 0.f : m_wipe_tower_data.tool_ordering.back().print_z);
-
+    wipe_tower.set_has_tpu_filament(this->has_tpu_filament());
     wipe_tower.set_filament_map(this->get_filament_maps());
     // Set the extruder & material properties at the wipe tower object.
     for (size_t i = 0; i < number_of_extruders; ++ i)

src/libslic3r/Print.hpp

@@ -899,6 +899,7 @@ private:
     //BBS
     static StringObjectException check_multi_filament_valid(const Print &print);
 
+    bool                has_tpu_filament() const;
     bool                invalidate_state_by_config_options(const ConfigOptionResolver &new_config, const std::vector<t_config_option_key> &opt_keys);
 
     void                _make_skirt();