void PrimeTower::addPurgeMove(LayerPlan& gcode_layer, int extruder_nr, const ExtruderTrain *train, const Point& start_pos, const Point& end_pos, double purge_volume) const { // Find out how much purging needs to be done. const GCodePathConfig& current_gcode_path_config = gcode_layer.configs_storage.prime_tower_config_per_extruder[extruder_nr]; const coord_t purge_move_length = vSize(start_pos - end_pos); const unsigned int line_width = current_gcode_path_config.getLineWidth(); const double layer_height_mm = (gcode_layer.getLayerNr() == 0) ? train->getSettingInMillimeters("layer_height_0") : train->getSettingInMillimeters("layer_height"); const double normal_volume = INT2MM(INT2MM(purge_move_length * line_width)) * layer_height_mm; // Volume extruded on the "normal" move float purge_flow = purge_volume / normal_volume; const double purge_move_length_mm = INT2MM(purge_move_length); const double purge_move_time = purge_move_length_mm / current_gcode_path_config.getSpeed(); const double purge_extrusion_speed_mm3_per_sec = purge_volume / purge_move_time; const double max_possible_extursion_speed_mm3_per_sec = 3.0; const double speed = current_gcode_path_config.getSpeed(); double speed_factor = 1.0; if (purge_extrusion_speed_mm3_per_sec > max_possible_extursion_speed_mm3_per_sec) { // compensate the travel speed for the large extrusion amount const double min_time_needed_for_extrusion = purge_volume / max_possible_extursion_speed_mm3_per_sec; const double compensated_speed = purge_move_length_mm / min_time_needed_for_extrusion; speed_factor = compensated_speed / speed; } // As we need a plan, which can't have a stationary extrusion, we use an extrusion move to prime. // This has the added benefit that it will evenly spread the primed material inside the tower. gcode_layer.addExtrusionMove(end_pos, current_gcode_path_config, SpaceFillType::None, purge_flow, false, speed_factor); }
void PrimeTower::preWipeAndPurge(const SliceDataStorage& storage, LayerPlan& gcode_layer, const int extruder_nr) const { int current_pre_wipe_location_idx = (pre_wipe_location_skip * gcode_layer.getLayerNr()) % number_of_pre_wipe_locations; const ClosestPolygonPoint wipe_location = pre_wipe_locations[current_pre_wipe_location_idx]; const ExtruderTrain* train = storage.meshgroup->getExtruderTrain(extruder_nr); const int inward_dist = train->getSettingInMicrons("machine_nozzle_size") * 3 / 2 ; const int start_dist = train->getSettingInMicrons("machine_nozzle_size") * 2; const Point prime_end = PolygonUtils::moveInsideDiagonally(wipe_location, inward_dist); const Point outward_dir = wipe_location.location - prime_end; const Point prime_start = wipe_location.location + normal(outward_dir, start_dist); const double purge_volume = std::max(0.0, train->getSettingInCubicMillimeters("prime_tower_purge_volume")); // Volume to be primed if (wipe_from_middle) { // for hollow wipe tower: // start from above // go to wipe start // go to the Z height of the previous/current layer // wipe // go to normal layer height (automatically on the next extrusion move)... GCodePath& toward_middle = gcode_layer.addTravel(middle); toward_middle.perform_z_hop = true; gcode_layer.forceNewPathStart(); if (purge_volume > 0) { addPurgeMove(gcode_layer, extruder_nr, train, middle, prime_start, purge_volume); } else { // Normal move behavior to wipe start location. GCodePath& toward_wipe_start = gcode_layer.addTravel_simple(prime_start); toward_wipe_start.perform_z_hop = false; toward_wipe_start.retract = true; } } else { if (purge_volume > 0) { // Find location to start purge (we're purging right outside of the tower) const Point purge_start = prime_start + normal(outward_dir, start_dist); gcode_layer.addTravel(purge_start); addPurgeMove(gcode_layer, extruder_nr, train, purge_start, prime_start, purge_volume); } gcode_layer.addTravel(prime_start); } float flow = 0.0001; // Force this path being interpreted as an extrusion path, so that no Z hop will occur (TODO: really separately handle travel and extrusion moves) gcode_layer.addExtrusionMove(prime_end, gcode_layer.configs_storage.prime_tower_config_per_extruder[extruder_nr], SpaceFillType::None, flow); }
bool SpaghettiInfillPathGenerator::processSpaghettiInfill(const SliceDataStorage& storage, const FffGcodeWriter& fff_gcode_writer, LayerPlan& gcode_layer, const SliceMeshStorage& mesh, const int extruder_nr, const PathConfigStorage::MeshPathConfigs& mesh_config, const SliceLayerPart& part, int infill_line_distance, int infill_overlap, int infill_angle, const Point& infill_origin) { if (extruder_nr != mesh.getSettingAsExtruderNr("infill_extruder_nr")) { return false; } bool added_something = false; const GCodePathConfig& config = mesh_config.infill_config[0]; const EFillMethod pattern = mesh.getSettingAsFillMethod("infill_pattern"); const bool zig_zaggify_infill = mesh.getSettingBoolean("zig_zaggify_infill"); const bool connect_polygons = true; // spaghetti infill should have as least as possible travel moves const unsigned int infill_line_width = config.getLineWidth(); constexpr int infill_multiplier = 1; const int64_t infill_shift = 0; constexpr int wall_line_count = 0; const int64_t outline_offset = 0; const double layer_height_mm = (gcode_layer.getLayerNr() == 0) ? mesh.getSettingInMillimeters("layer_height_0") : mesh.getSettingInMillimeters("layer_height"); // For each part on this layer which is used to fill that part and parts below: for (const std::pair<Polygons, double>& filling_area : part.spaghetti_infill_volumes) { Polygons infill_lines; Polygons infill_polygons; const Polygons& area = filling_area.first; // Area of the top within which to move while extruding (might be empty if the spaghetti_inset was too large) const double total_volume = filling_area.second * mesh.getSettingAsRatio("spaghetti_flow") + mesh.getSettingInCubicMillimeters("spaghetti_infill_extra_volume"); // volume to be extruded if (total_volume <= 0.0) { continue; } // generate zigzag print head paths Polygons* perimeter_gaps_output = nullptr; const bool connected_zigzags = true; const bool use_endpieces = false; Infill infill_comp(pattern, zig_zaggify_infill, connect_polygons, area, outline_offset , infill_line_width, infill_line_distance, infill_overlap, infill_multiplier, infill_angle, gcode_layer.z, infill_shift, wall_line_count, infill_origin, perimeter_gaps_output, connected_zigzags, use_endpieces , mesh.getSettingInMicrons("cross_infill_pocket_size")); // cross_fill_patterns is only generated when spaghetti infill is not used, // so we pass nullptr here. infill_comp.generate(infill_polygons, infill_lines, nullptr, &mesh); // add paths to plan with a higher flow ratio in order to extrude the required amount. const coord_t total_length = infill_polygons.polygonLength() + infill_lines.polyLineLength(); if (total_length > 0) { // zigzag path generation actually generated paths // calculate the normal volume extruded when using the layer height and line width to calculate extrusion const double normal_volume = INT2MM(INT2MM(total_length * infill_line_width)) * layer_height_mm; assert(normal_volume > 0.0); const float flow_ratio = total_volume / normal_volume; assert(flow_ratio / mesh.getSettingAsRatio("spaghetti_flow") >= 0.9); assert(!std::isnan(flow_ratio) && !std::isinf(flow_ratio)); if (!infill_polygons.empty() || !infill_lines.empty()) { added_something = true; fff_gcode_writer.setExtruder_addPrime(storage, gcode_layer, extruder_nr); if (!infill_polygons.empty()) { constexpr bool force_comb_retract = false; gcode_layer.addTravel(infill_polygons[0][0], force_comb_retract); gcode_layer.addPolygonsByOptimizer(infill_polygons, config, nullptr, ZSeamConfig(), 0, false, flow_ratio); } const bool is_zigzag = mesh.getSettingBoolean("zig_zaggify_infill") || pattern == EFillMethod::ZIG_ZAG; const coord_t wipe_dist = is_zigzag ? 0 : -mesh.getSettingInMicrons("infill_wipe_dist"); const SpaceFillType line_type = is_zigzag ? SpaceFillType::Lines : SpaceFillType::PolyLines; gcode_layer.addLinesByOptimizer(infill_lines, config, line_type, false, wipe_dist, flow_ratio); } } else { // zigzag path generation couldn't generate paths, probably because the area was too small // generate small path near the middle of the filling area // note that we need a path with positive length because that is currently the only way to insert an extrusion in a layer plan constexpr int path_length = 10; Point middle = AABB(area).getMiddle(); if (!area.inside(middle)) { PolygonUtils::ensureInsideOrOutside(area, middle, infill_line_width / 2); } const double normal_volume = INT2MM(INT2MM(path_length * infill_line_width)) * layer_height_mm; const float flow_ratio = total_volume / normal_volume; gcode_layer.addTravel(middle); gcode_layer.addExtrusionMove(middle + Point(0, path_length), config, SpaceFillType::Lines, flow_ratio); } } return added_something; }