SEMM: Introduced parameter to control the maximum speed used for purging in the purge tower

src/libslic3r/GCode/WipeTower2.cpp

@@ -550,7 +550,8 @@ WipeTower2::WipeTower2(const PrintConfig& config, const PrintRegionConfig& defau
     m_infill_speed(default_region_config.sparse_infill_speed),
     m_perimeter_speed(default_region_config.inner_wall_speed),
     m_current_tool(initial_tool),
-    wipe_volumes(wiping_matrix)
+    wipe_volumes(wiping_matrix),
+    m_wipe_tower_max_purge_speed(float(config.wipe_tower_max_purge_speed))
 {
     // Read absolute value of first layer speed, if given as percentage,
     // it is taken over following default. Speeds from config are not
@@ -1099,7 +1100,7 @@ void WipeTower2::toolchange_Wipe(
     // All the calculations in all other places take the spacing into account for all the layers.
 
 	// If spare layers are excluded->if 1 or less toolchange has been done, it must be sill the first layer, too.So slow down.
-    const float target_speed = is_first_layer() || (m_num_tool_changes <= 1 && m_no_sparse_layers) ? m_first_layer_speed * 60.f : std::min(5400.f, m_infill_speed * 60.f);
+    const float target_speed = is_first_layer() || (m_num_tool_changes <= 1 && m_no_sparse_layers) ? m_first_layer_speed * 60.f : std::min(m_wipe_tower_max_purge_speed * 60.f, m_infill_speed * 60.f);
     float wipe_speed = 0.33f * target_speed;
 
     // if there is less than 2.5*m_perimeter_width to the edge, advance straightaway (there is likely a blob anyway)

src/libslic3r/GCode/WipeTower2.hpp

@@ -189,6 +189,7 @@ class WipeTower2
     int    m_old_temperature    = -1;   // To keep track of what was the last temp that we set (so we don't issue the command when not neccessary)
     float  m_travel_speed       = 0.f;
 	float  m_infill_speed       = 0.f;
+    float  m_wipe_tower_max_purge_speed   = 90.f;
 	float  m_perimeter_speed    = 0.f;
     float  m_first_layer_speed  = 0.f;
     size_t m_first_layer_idx    = size_t(-1);

src/libslic3r/Preset.cpp

@@ -816,7 +816,7 @@ static std::vector<std::string> s_Preset_print_options {
      "tree_support_brim_width", "gcode_comments", "gcode_label_objects",
      "initial_layer_travel_speed", "exclude_object", "slow_down_layers", "infill_anchor", "infill_anchor_max","initial_layer_min_bead_width",
      "make_overhang_printable", "make_overhang_printable_angle", "make_overhang_printable_hole_size" ,"notes",
-     "wipe_tower_cone_angle", "wipe_tower_extra_spacing", "wipe_tower_extruder", "wiping_volumes_extruders","wipe_tower_bridging", "single_extruder_multi_material_priming",
+     "wipe_tower_cone_angle", "wipe_tower_extra_spacing","wipe_tower_max_purge_speed", "wipe_tower_extruder", "wiping_volumes_extruders","wipe_tower_bridging", "single_extruder_multi_material_priming",
      "wipe_tower_rotation_angle", "tree_support_branch_distance_organic", "tree_support_branch_diameter_organic", "tree_support_branch_angle_organic",
      "hole_to_polyhole", "hole_to_polyhole_threshold", "hole_to_polyhole_twisted", "mmu_segmented_region_max_width", "mmu_segmented_region_interlocking_depth",
      "small_area_infill_flow_compensation", "small_area_infill_flow_compensation_model",

src/libslic3r/Print.cpp

@@ -304,6 +304,7 @@ bool Print::invalidate_state_by_config_options(const ConfigOptionResolver & /* n
             || opt_key == "slow_down_layers"
             || opt_key == "wipe_tower_cone_angle"
             || opt_key == "wipe_tower_extra_spacing"
+            || opt_key == "wipe_tower_max_purge_speed"
             || opt_key == "wipe_tower_extruder"
             || opt_key == "wiping_volumes_extruders"
             || opt_key == "enable_filament_ramming"

src/libslic3r/PrintConfig.cpp

@@ -4757,6 +4757,18 @@ def = this->add("filament_loading_speed", coFloats);
     def->min = 100.;
     def->max = 300.;
     def->set_default_value(new ConfigOptionPercent(100.));
+
+    def = this->add("wipe_tower_max_purge_speed", coFloat);
+    def->label = L("Maximum print speed when purging");
+    def->tooltip = L("The maximum print speed when purging in the wipe tower. If the sparse infill speed "
+                     "or calculated speed from the filament max volumetric speed is lower, the lowest speed will be used instead.\n"
+                     "Increasing this speed may affect the tower's stability, as purging can be performed over "
+                     "sparse layers. Before increasing this parameter beyond the default of 90mm/sec, make sure your printer can reliably "
+                     "bridge at the increased speeds.");
+    def->sidetext = L("mm/s");
+    def->mode = comAdvanced;
+    def->min = 10;
+    def->set_default_value(new ConfigOptionFloat(90.));
 
     def = this->add("wipe_tower_extruder", coInt);
     def->label = L("Wipe tower extruder");

src/libslic3r/PrintConfig.hpp

@@ -1240,6 +1240,7 @@ PRINT_CONFIG_CLASS_DERIVED_DEFINE(
     // Orca: mmu support
     ((ConfigOptionFloat,              wipe_tower_cone_angle))
     ((ConfigOptionPercent,            wipe_tower_extra_spacing))
+    ((ConfigOptionFloat,                wipe_tower_max_purge_speed))
     ((ConfigOptionInt,                wipe_tower_extruder))
     ((ConfigOptionFloats,             wiping_volumes_extruders))
 

src/slic3r/GUI/ConfigManipulation.cpp

@@ -678,7 +678,7 @@ void ConfigManipulation::toggle_print_fff_options(DynamicPrintConfig *config, co
 
     bool purge_in_primetower = preset_bundle->printers.get_edited_preset().config.opt_bool("purge_in_prime_tower");
 
-    for (auto el : {"wipe_tower_rotation_angle", "wipe_tower_cone_angle", "wipe_tower_extra_spacing", "wipe_tower_bridging", "wipe_tower_no_sparse_layers"})
+    for (auto el : {"wipe_tower_rotation_angle", "wipe_tower_cone_angle", "wipe_tower_extra_spacing", "wipe_tower_max_purge_speed", "wipe_tower_bridging", "wipe_tower_no_sparse_layers"})
         toggle_line(el, have_prime_tower && purge_in_primetower);
 
     toggle_line("prime_volume",have_prime_tower && !purge_in_primetower);

src/slic3r/GUI/Plater.cpp

@@ -2706,7 +2706,7 @@ Plater::priv::priv(Plater *q, MainFrame *main_frame)
         "brim_width", "wall_loops", "wall_filament", "sparse_infill_density", "sparse_infill_filament", "top_shell_layers",
         "enable_support", "support_filament", "support_interface_filament",
         "support_top_z_distance", "support_bottom_z_distance", "raft_layers",
-        "wipe_tower_rotation_angle", "wipe_tower_cone_angle", "wipe_tower_extra_spacing", "wipe_tower_extruder",
+        "wipe_tower_rotation_angle", "wipe_tower_cone_angle", "wipe_tower_extra_spacing","wipe_tower_max_purge_speed", "wipe_tower_extruder",
         "best_object_pos"
         }))
     , sidebar(new Sidebar(q))

src/slic3r/GUI/Tab.cpp

@@ -2283,6 +2283,7 @@ void TabPrint::build()
         optgroup->append_single_option_line("wipe_tower_bridging");
         optgroup->append_single_option_line("wipe_tower_cone_angle");
         optgroup->append_single_option_line("wipe_tower_extra_spacing");
+        optgroup->append_single_option_line("wipe_tower_max_purge_speed");
         optgroup->append_single_option_line("wipe_tower_no_sparse_layers");
         // optgroup->append_single_option_line("single_extruder_multi_material_priming");