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fix: use max bed temp across extruders in multi-material layer 2 transition #418

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fix: use max bed temp across extruders in multi-material layer 2 transition #418

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9 changes: 7 additions & 2 deletions src/libslic3r/GCode.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -4931,8 +4931,13 @@ LayerResult GCode::process_layer(const Print& print,
gcode += m_writer.set_temperature(temperature, false, extruder.id());
}

// BBS
int bed_temp = get_bed_temperature(first_extruder_id, false, print.config().curr_bed_type);
// Use the maximum bed temperature across all active extruders so that a mixed-material
// print (e.g. PLA + TPU) does not drop the bed temp to the lower-temp material's value
// on layer 2, which would cause adhesion failures for the higher-temp material.
int bed_temp = 0;
for (const Extruder& extruder : m_writer.extruders()) {
bed_temp = std::max(bed_temp, get_bed_temperature(extruder.id(), false, print.config().curr_bed_type));
}
gcode += m_writer.set_bed_temperature(bed_temp);
// Mark the temperature transition from 1st to 2nd layer to be finished.
m_second_layer_things_done = true;
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