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Fix first layer speed and layer slow down handling with rafts (#13224)

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Adjust initial- and slowdown-layer speed logic to correctly account for raft layers. Replace the previous layer checks with object_layer_over_raft(), simplify initial-layer speed selection, and split the slow_down_layers interpolation into separate branches for configurations with and without rafts so the lerp uses the correct layer offset. Also avoid applying overhang speed adjustments to object layers that are over rafts.
This commit is contained in:
yogihybo
2026-04-23 02:02:12 +10:00
committed by GitHub
parent 3611903b8d
commit 5b05b6104a
1 changed files with 22 additions and 8 deletions
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30
src/libslic3r/GCode.cpp
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@@ -6365,14 +6365,17 @@ std::string GCode::_extrude(const ExtrusionPath &path, std::string description,
if (speed == 0)
speed = filament_max_volumetric_speed / _mm3_per_mm;
if (this->on_first_layer()) {
const auto _layer = layer_id();
if (this->on_first_layer() || object_layer_over_raft()) {
//BBS: for solid infill of first layer, speed can be higher as long as
//wall lines have be attached
if (path.role() != erBottomSurface)
speed = m_config.get_abs_value("initial_layer_speed");
}
else if(m_config.slow_down_layers > 1){
const auto _layer = layer_id();
if (path.role() != erBottomSurface) {
speed = is_perimeter(path.role()) ? m_config.get_abs_value("initial_layer_speed") :
m_config.get_abs_value("initial_layer_infill_speed");
}
} else if (m_config.slow_down_layers > 1 && !m_config.raft_layers > 0) {
if (_layer > 0 && _layer < m_config.slow_down_layers) {
const auto first_layer_speed =
is_perimeter(path.role())
@@ -6382,7 +6385,18 @@ std::string GCode::_extrude(const ExtrusionPath &path, std::string description,
speed = std::min(
speed,
Slic3r::lerp(first_layer_speed, speed,
(double)_layer / m_config.slow_down_layers));
(double) (_layer) / m_config.slow_down_layers));
}
}
} else if (m_config.slow_down_layers > 1 && m_config.raft_layers > 0 ) {
if (_layer > m_config.raft_layers && (_layer - m_config.raft_layers) < m_config.slow_down_layers) {
const auto first_layer_speed
= is_perimeter(path.role()) ? m_config.get_abs_value("initial_layer_speed") :
m_config.get_abs_value("initial_layer_infill_speed");
if (first_layer_speed < speed) {
speed = std::min(speed, Slic3r::lerp(first_layer_speed, speed,
(double) (_layer - m_config.raft_layers) / m_config.slow_down_layers));
}
}
}
@@ -6445,7 +6459,7 @@ std::string GCode::_extrude(const ExtrusionPath &path, std::string description,
bool variable_speed = false;
std::vector<ProcessedPoint> new_points {};
if (m_config.enable_overhang_speed && !this->on_first_layer() &&
if (m_config.enable_overhang_speed && !this->on_first_layer() && !object_layer_over_raft() &&
(is_bridge(path.role()) || is_perimeter(path.role()))) {
bool is_external = is_external_perimeter(path.role());
double ref_speed = is_external ? m_config.get_abs_value("outer_wall_speed") : m_config.get_abs_value("inner_wall_speed");