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Fix multi-tool standby heaters by turning off unused extruders (#15849)

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With ooze prevention on, an extruder that has no layers left is set to 0 °C when it is parked, instead of its standby temperature. On IMEX printers where several filaments share one heater, the heater is only turned off once every filament on it is done.
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Error404JoyNotFound authored and GitHub committed 2026-10-15 16:35:53 -05:00
1 parent b00237807d
commit 109d09e0b8
6 files changed
+155 -20
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src/libslic3r/GCode.cpp
+27 -18
View File
@@ -432,27 +432,36 @@ static std::vector<Vec2d> get_path_of_change_filament(const Print& print)
std::string OozePrevention::pre_toolchange(GCode& gcodegen)
{
std::string gcode;
unsigned int extruder_id = gcodegen.writer().filament()->id();
const auto& filament_idle_temp = gcodegen.config().idle_temperature;
if (filament_idle_temp.get_at(extruder_id) == 0) {
// There is no idle temperature defined in filament settings.
// Use the delta value from print config.
if (gcodegen.config().standby_temperature_delta.value != 0) {
// we assume that heating is always slower than cooling, so no need to block
gcode += gcodegen.writer().set_temperature
(this->_get_temp(gcodegen) + gcodegen.config().standby_temperature_delta.value, false, extruder_id);
gcode.pop_back();
gcode += " ;cooldown\n"; // this is a marker for GCodeProcessor, so it can supress the commands when needed
}
} else {
// Use the value from filament settings. That one is absolute, not delta.
gcode += gcodegen.writer().set_temperature(filament_idle_temp.get_at(extruder_id), false, extruder_id);
gcode.pop_back();
gcode += " ;cooldown\n"; // this is a marker for GCodeProcessor, so it can supress the commands when needed
// Check if this tool will ever be used again in this print.
bool is_last_use = false;
if (gcodegen.m_print != nullptr && !gcodegen.m_print->tool_ordering().empty()) {
coordf_t current_z = gcodegen.layer() ? gcodegen.layer()->print_z : gcodegen.writer().get_position().z();
const auto& tool_ordering = gcodegen.m_print->tool_ordering();
const auto& cfg = gcodegen.config();
const int heater = imex_physical_heater_for(cfg.is_imex.value, cfg.physical_extruder_map, int(extruder_id));
is_last_use = tool_ordering.is_last_extrusion_layer(current_z, extruder_id);
for (unsigned int f : tool_ordering.all_extruders())
if (is_last_use && imex_physical_heater_for(cfg.is_imex.value, cfg.physical_extruder_map, int(f)) == heater)
is_last_use = tool_ordering.is_last_extrusion_layer(current_z, f);
}
int temp = 0;
if (!is_last_use) {
const auto& filament_idle_temp = gcodegen.config().idle_temperature;
if (filament_idle_temp.get_at(extruder_id) == 0) {
if (gcodegen.config().standby_temperature_delta.value == 0)
return std::string();
temp = this->_get_temp(gcodegen) + gcodegen.config().standby_temperature_delta.value;
} else {
temp = filament_idle_temp.get_at(extruder_id);
}
}
std::string gcode = gcodegen.writer().set_temperature(temp, false, extruder_id);
gcode.pop_back();
gcode += " ;cooldown\n"; // this is a marker for GCodeProcessor, so it can supress the commands when needed
return gcode;
}