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Optimisation: ERS - Reduce redundant gcode commands from extrusion rate smoothing (#7398)

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* Optimisation: Reduce volume of output gcode commands for pressure equalizer

* Update thresholds

* Update PrintConfig.cpp

* Merge branch 'main' into Optimisation-Reduce-reduntant-gcode-commands-produced-by-Estrusion-Rate-Smoothing

* Merge branch 'SoftFever:main' into Optimisation-Reduce-reduntant-gcode-commands-produced-by-Estrusion-Rate-Smoothing

* Merge branch 'SoftFever:main' into Optimisation-Reduce-reduntant-gcode-commands-produced-by-Estrusion-Rate-Smoothing

* Merge branch 'SoftFever:main' into Optimisation-Reduce-reduntant-gcode-commands-produced-by-Estrusion-Rate-Smoothing

* Merge branch 'main' into Optimisation-Reduce-reduntant-gcode-commands-produced-by-Estrusion-Rate-Smoothing

* Merge branch 'SoftFever:main' into Optimisation-Reduce-reduntant-gcode-commands-produced-by-Estrusion-Rate-Smoothing

* Merge branch 'main' into Optimisation-Reduce-reduntant-gcode-commands-produced-by-Estrusion-Rate-Smoothing

* Merge branch 'SoftFever:main' into Optimisation-Reduce-reduntant-gcode-commands-produced-by-Estrusion-Rate-Smoothing

* Merge branch 'main' into Optimisation-Reduce-reduntant-gcode-commands-produced-by-Estrusion-Rate-Smoothing
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Ioannis Giannakas 2025-01-05 15:05:04 +00:00 • committed by GitHub
parent 604ded5ff0
commit 67cc143916
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1 changed files with 19 additions and 4 deletions
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23
src/libslic3r/GCode/PressureEqualizer.cpp
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@ -482,11 +482,25 @@ void PressureEqualizer::output_gcode_line(const size_t line_idx)
if (*comment != ';')
comment = nullptr;
// Emit the line with lowered extrusion rates.
// get the gcode line length
float l = line.dist_xyz();
if (auto nSegments = size_t(ceil(l / m_max_segment_length)); nSegments == 1) { // Just update this segment.
// number of segments this line can be broken down to
auto nSegments = size_t(ceil(l / m_max_segment_length));
// Orca:
// Calculate the absolute difference in volumetric extrusion rate between the start and end point of the line.
// Quantize it to 1mm3/min (0.016mm3/sec).
int delta_volumetric_rate = std::round(fabs(line.volumetric_extrusion_rate_end - line.volumetric_extrusion_rate_start));
// Emit the line with lowered extrusion rates.
// Orca:
// First, check if the change in volumetric extrusion rate is trivial (less than 10mm3/min -> 0.16mm3/sec (5mm/sec speed for a 0.25 mm nozzle).
// Or if the line size is equal in length with the smallest segment.
// If so, then emit the line as a single extrusion, i.e. dont split into segments.
if ( nSegments == 1 || delta_volumetric_rate < 10) {
push_line_to_output(line_idx, line.feedrate() * line.volumetric_correction_avg(), comment);
} else {
} else // The line needs to be split the line into segments and apply extrusion rate smoothing
{
bool accelerating = line.volumetric_extrusion_rate_start < line.volumetric_extrusion_rate_end;
// Update the initial and final feed rate values.
line.pos_start[4] = line.volumetric_extrusion_rate_start * line.pos_end[4] / line.volumetric_extrusion_rate;
@ -769,7 +783,8 @@ void PressureEqualizer::push_line_to_output(const size_t line_idx, float new_fee
// Orca: sanity check, 1 mm/s is the minimum feedrate.
if (new_feedrate < 60)
new_feedrate = 60;
new_feedrate = std::round(new_feedrate);
// Quantize speed changes to a minimum of 1mm/sec, to reduce gcode volume for trivial speed changes.
new_feedrate = std::round(new_feedrate / 60.0) * 60.0;
const GCodeLine &line = m_gcode_lines[line_idx];
if (line_idx > 0 && output_buffer_length > 0) {
const std::string prev_line_str = std::string(output_buffer.begin() + int(this->output_buffer_prev_length),