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Reduce bounds on auto width again (the math likes to go very wide which is not feasible if your nozzle isn't really big).

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Should address #4212
This commit is contained in:
Joseph Lenox 2018-01-05 20:02:54 -06:00
parent d8a331fda0
commit 54e86b7307
2 changed files with 7 additions and 6 deletions
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10
xs/src/libslic3r/Flow.cpp
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@ -90,18 +90,18 @@ Flow::_bridge_width(float nozzle_diameter, float bridge_flow_ratio) {
/* This static method returns a sane extrusion width default. */ /* This static method returns a sane extrusion width default. */
float float
Flow::_auto_width(FlowRole role, float nozzle_diameter, float height) { Flow::_auto_width(FlowRole role, float nozzle_diameter, float height) const {
// here we calculate a sane default by matching the flow speed (at the nozzle) and the feed rate // here we calculate a sane default by matching the flow speed (at the nozzle) and the feed rate
// shape: rectangle with semicircles at the ends // shape: rectangle with semicircles at the ends
float width = ((nozzle_diameter*nozzle_diameter) * PI + (height*height) * (4.0 - PI)) / (4.0 * height); float width = ((nozzle_diameter*nozzle_diameter) * PI + (height*height) * (4.0 - PI)) / (4.0 * height);
float min = nozzle_diameter * 1.05; float min = nozzle_diameter * 1.05;
float max = nozzle_diameter * 3; // cap width to 3x nozzle diameter float max = nozzle_diameter * 1.25; // cap width to 1.25x nozzle diameter
if (role == frExternalPerimeter || role == frSupportMaterial || role == frSupportMaterialInterface) { if (role == frExternalPerimeter || role == frSupportMaterial || role == frSupportMaterialInterface) {
min = max = nozzle_diameter; min = max = nozzle_diameter*1.1;
} else if (role != frInfill) { } else if (role != frInfill) {
// do not limit width for sparse infill so that we use full native flow for it // limit width a bit for sparse infill to avoid unwanted overextrusion.
max = nozzle_diameter * 1.7; max = nozzle_diameter * 1.4;
} }
if (width > max) width = max; if (width > max) width = max;
if (width < min) width = min; if (width < min) width = min;

3
xs/src/libslic3r/Flow.hpp
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@ -69,7 +69,8 @@ class Flow
static float _bridge_width(float nozzle_diameter, float bridge_flow_ratio); static float _bridge_width(float nozzle_diameter, float bridge_flow_ratio);
/// Calculate a relatively sane extrusion width, based on height and nozzle diameter. /// Calculate a relatively sane extrusion width, based on height and nozzle diameter.
/// Algorithm used does not play nice with layer heights < 0.1mm. /// Algorithm used does not play nice with layer heights < 0.1mm.
static float _auto_width(FlowRole role, float nozzle_diameter, float height); /// To avoid extra headaches, min and max are capped at 105% and 125% of nozzle diameter.
static float _auto_width(FlowRole role, float nozzle_diameter, float height) const;
static float _width_from_spacing(float spacing, float nozzle_diameter, float height, bool bridge); static float _width_from_spacing(float spacing, float nozzle_diameter, float height, bool bridge);
}; };