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Extrusion flow calculation based on nozzle diameter etc

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This commit is contained in:
Lukas Matena
2017-12-07 11:59:14 +01:00
parent c34fd10e23
commit 87c67636df
2 changed files with 24 additions and 10 deletions
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23
xs/src/libslic3r/GCode/WipeTowerPrusaMM.hpp
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@@ -8,6 +8,18 @@
#include "WipeTower.hpp"
// Following is used to calculate extrusion flow - should be taken from config in future
constexpr float Filament_Diameter = 1.75f; // filament diameter in mm
constexpr float Nozzle_Diameter = 0.4f; // nozzle diameter in mm
// desired line width (oval) in multiples of nozzle diameter - may not be actually neccessary to adjust
constexpr float Width_To_Nozzle_Ratio = 1.f;
// m_perimeter_width was hardcoded until now as 0.5 (for 0.4 nozzle and 0.2 layer height)
// Konst = 1.25 implies same result
constexpr float Konst = 1.25f;
constexpr float m_perimeter_width = Nozzle_Diameter * Width_To_Nozzle_Ratio * Konst;
namespace Slic3r
{
@@ -63,7 +75,7 @@ public:
// _zHop - z hop value in mm
void set_zhop(float zhop) { m_zhop = zhop; }
// Set the extruder properties.
void set_extruder(size_t idx, material_type material, int temp, int first_layer_temp)
{
@@ -101,9 +113,12 @@ public:
// Extrusion rate for an extrusion aka perimeter width 0.35mm.
// Clamp the extrusion height to a 0.2mm layer height, independent of the nozzle diameter.
// m_extrusion_flow = std::min(0.2f, layer_height) * 0.145f;
// Use a strictly
m_extrusion_flow = layer_height * 0.145f;
//m_extrusion_flow = layer_height * 0.145f;
// Calculates extrusion flow from desired line width, nozzle diameter, filament diameter and layer_height
m_extrusion_flow = 4.f * layer_height * ( Width_To_Nozzle_Ratio * Nozzle_Diameter - layer_height * (1-M_PI/4.f)) /
(M_PI * pow(Filament_Diameter,2.f));
}
// Return the wipe tower position.
@@ -174,7 +189,7 @@ private:
float m_zhop = 0.5f;
float m_retract = 4.f;
// Width of an extrusion line, also a perimeter spacing for 100% infill.
float m_perimeter_width = 0.5f;
float m_line_width = Nozzle_Diameter * Width_To_Nozzle_Ratio;
// Extrusion flow is derived from m_perimeter_width, layer height and filament diameter.
float m_extrusion_flow = 0.029f;