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Ramp up layer cooling fan over X layers #848

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Fan speed will be ramped up linearly from zero at layer disable_fan_first_layers
to maximum at layer full_fan_speed_layer. full_fan_speed_layer will be
ignored if lower than disable_fan_first_layers, in which case
the fan will be running at maximum allowed speed at layer
disable_fan_first_layers + 1.;

WIP: The cooling PresetHints are likely not finalized yet.
This commit is contained in:
Vojtech Bubnik 2020-12-04 11:53:02 +01:00
parent 1b720dbc3d
commit e1fc0b17a2
7 changed files with 56 additions and 26 deletions
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14
src/libslic3r/GCode/CoolingBuffer.cpp
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@ -682,7 +682,8 @@ std::string CoolingBuffer::apply_layer_cooldown(
#define EXTRUDER_CONFIG(OPT) config.OPT.get_at(m_current_extruder)
int min_fan_speed = EXTRUDER_CONFIG(min_fan_speed);
int fan_speed_new = EXTRUDER_CONFIG(fan_always_on) ? min_fan_speed : 0;
if (layer_id >= (size_t)EXTRUDER_CONFIG(disable_fan_first_layers)) {
int disable_fan_first_layers = EXTRUDER_CONFIG(disable_fan_first_layers);
if (int(layer_id) >= disable_fan_first_layers) {
int max_fan_speed = EXTRUDER_CONFIG(max_fan_speed);
float slowdown_below_layer_time = float(EXTRUDER_CONFIG(slowdown_below_layer_time));
float fan_below_layer_time = float(EXTRUDER_CONFIG(fan_below_layer_time));
@ -698,6 +699,17 @@ std::string CoolingBuffer::apply_layer_cooldown(
}
}
bridge_fan_speed = EXTRUDER_CONFIG(bridge_fan_speed);
// Is the fan speed ramp enabled?
int full_fan_speed_layer = EXTRUDER_CONFIG(full_fan_speed_layer);
// When ramping up fan speed from disable_fan_first_layers to full_fan_speed_layer, force disable_fan_first_layers above zero,
// so there will be a zero fan speed at least at the 1st layer.
disable_fan_first_layers = std::max(disable_fan_first_layers, 1);
if (int(layer_id) >= disable_fan_first_layers && int(layer_id) + 1 < full_fan_speed_layer) {
// Ramp up the fan speed from disable_fan_first_layers to full_fan_speed_layer.
float factor = float(int(layer_id + 1) - disable_fan_first_layers) / float(full_fan_speed_layer - disable_fan_first_layers);
fan_speed_new = clamp(0, 255, int(float(fan_speed_new ) * factor + 0.5f));
bridge_fan_speed = clamp(0, 255, int(float(bridge_fan_speed) * factor + 0.5f));
}
#undef EXTRUDER_CONFIG
bridge_fan_control = bridge_fan_speed > fan_speed_new;
} else {