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Cooling: add per-printer non-zero fan PWM floor and fix N=0 fan ramp override (#13715)

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* Cooling: add per-printer non-zero fan PWM floor and fix N=0 ramp override
* updated parameter naming
This commit is contained in:
Ioannis Giannakas
2026-05-19 09:40:53 +01:00
committed by GitHub
parent 7fc1e109c5
commit 3370e224b2
9 changed files with 61 additions and 18 deletions
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29
src/libslic3r/GCode/CoolingBuffer.cpp
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@@ -719,6 +719,9 @@ std::string CoolingBuffer::apply_layer_cooldown(
// Second generate the adjusted G-code.
std::string new_gcode;
new_gcode.reserve(gcode.size() * 2);
// ORCA: per-printer minimum non-zero fan PWM. Applied at every part-cooling fan emission below so any
// non-zero command is raised to at least this percent (0 disables the clamp).
const unsigned int part_cooling_fan_min_pwm = static_cast<unsigned int>(std::max(0, m_config.part_cooling_fan_min_pwm.value));
bool overhang_fan_control= false;
int overhang_fan_speed = 0;
bool internal_bridge_fan_control= false; // ORCA: Add support for separate internal bridge fan speed control
@@ -727,7 +730,7 @@ std::string CoolingBuffer::apply_layer_cooldown(
int supp_interface_fan_speed = 0;
bool ironing_fan_control= false; // ORCA: Add support for ironing fan speed control
int ironing_fan_speed = 0; // ORCA: Add support for ironing fan speed control
auto change_extruder_set_fan = [ this, layer_id, layer_time, &new_gcode,
auto change_extruder_set_fan = [ this, layer_id, layer_time, &new_gcode, part_cooling_fan_min_pwm,
&overhang_fan_control, &overhang_fan_speed,
&internal_bridge_fan_control, &internal_bridge_fan_speed,
&supp_interface_fan_control, &supp_interface_fan_speed,
@@ -743,11 +746,11 @@ std::string CoolingBuffer::apply_layer_cooldown(
int full_fan_speed_layer = EXTRUDER_CONFIG(full_fan_speed_layer);
supp_interface_fan_speed = EXTRUDER_CONFIG(support_material_interface_fan_speed);
if (close_fan_the_first_x_layers <= 0 && full_fan_speed_layer > 0) {
// When ramping up fan speed from close_fan_the_first_x_layers to full_fan_speed_layer, force close_fan_the_first_x_layers above zero,
// so there will be a zero fan speed at least at the 1st layer.
close_fan_the_first_x_layers = 1;
}
// ORCA: previously a silent override forced `close_fan_the_first_x_layers` from 0 up to 1 whenever a ramp
// was configured (`full_fan_speed_layer > 0`), so the first printed layer always had the fan disabled.
// That hid the user's literal "no cooling for the first 0 layers" setting and produced a non-zero starting
// factor on the ramp denominator. The override has been removed: with N=0 and M>0 the ramp now genuinely
// starts on layer 0 at a factor of 1/M and reaches 100% at layer M-1, matching the intent of the option.
if (int(layer_id) >= close_fan_the_first_x_layers) {
float fan_max_speed = EXTRUDER_CONFIG(fan_max_speed);
float slow_down_layer_time = float(EXTRUDER_CONFIG(slow_down_layer_time));
@@ -806,7 +809,7 @@ std::string CoolingBuffer::apply_layer_cooldown(
m_fan_speed = fan_speed_new;
m_current_fan_speed = fan_speed_new;
if (immediately_apply)
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, m_fan_speed);
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, m_fan_speed, part_cooling_fan_min_pwm);
}
//BBS
if (additional_fan_speed_new != m_additional_fan_speed) {
@@ -980,26 +983,26 @@ std::string CoolingBuffer::apply_layer_cooldown(
if (need_set_fan) {
if (fan_speed_change_requests[CoolingLine::TYPE_OVERHANG_FAN_START]){
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, overhang_fan_speed);
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, overhang_fan_speed, part_cooling_fan_min_pwm);
m_current_fan_speed = overhang_fan_speed;
} else if (fan_speed_change_requests[CoolingLine::TYPE_INTERNAL_BRIDGE_FAN_START]){ // ORCA: Add support for separate internal bridge fan speed control
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, internal_bridge_fan_speed);
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, internal_bridge_fan_speed, part_cooling_fan_min_pwm);
m_current_fan_speed = internal_bridge_fan_speed;
}
else if (fan_speed_change_requests[CoolingLine::TYPE_SUPPORT_INTERFACE_FAN_START]){
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, supp_interface_fan_speed);
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, supp_interface_fan_speed, part_cooling_fan_min_pwm);
m_current_fan_speed = supp_interface_fan_speed;
}
else if (fan_speed_change_requests[CoolingLine::TYPE_IRONING_FAN_START]){
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, ironing_fan_speed);
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, ironing_fan_speed, part_cooling_fan_min_pwm);
m_current_fan_speed = ironing_fan_speed;
}
else if(fan_speed_change_requests[CoolingLine::TYPE_FORCE_RESUME_FAN] && m_current_fan_speed != -1){
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, m_current_fan_speed);
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, m_current_fan_speed, part_cooling_fan_min_pwm);
fan_speed_change_requests[CoolingLine::TYPE_FORCE_RESUME_FAN] = false;
}
else
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, m_fan_speed);
new_gcode += GCodeWriter::set_fan(m_config.gcode_flavor, m_fan_speed, part_cooling_fan_min_pwm);
need_set_fan = false;
}
pos = line_end;