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Fix of https://github.com/prusa3d/Slic3r/issues/1631

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This is a fix of a long standing bug, where an extrusion is incorrectly
drawn from the end of the last wipe move. Interestingly enough,
this bug is in Slic3r at least since 1.2.9, but lucky enough
it only occured for single perimeter, no infill prints with wipe after
retract enabled, and only if the two successive slices were discretized
exactly the same, which is quite unlikely.
This commit is contained in:
bubnikv 2019-01-14 19:57:41 +01:00
parent befccb0734
commit 54299d8eb0
2 changed files with 25 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

40
src/libslic3r/GCode.cpp
View file

@ -103,8 +103,7 @@ OozePrevention::_get_temp(GCode &gcodegen)
: gcodegen.config().temperature.get_at(gcodegen.writer().extruder()->id());
}
std::string
Wipe::wipe(GCode &gcodegen, bool toolchange)
std::string Wipe::wipe(GCode &gcodegen, bool toolchange)
{
std::string gcode;
@ -137,19 +136,22 @@ Wipe::wipe(GCode &gcodegen, bool toolchange)
wipe_path.clip_end(wipe_path.length() - wipe_dist);
// subdivide the retraction in segments
for (const Line &line : wipe_path.lines()) {
double segment_length = line.length();
/* Reduce retraction length a bit to avoid effective retraction speed to be greater than the configured one
due to rounding (TODO: test and/or better math for this) */
double dE = length * (segment_length / wipe_dist) * 0.95;
//FIXME one shall not generate the unnecessary G1 Fxxx commands, here wipe_speed is a constant inside this cycle.
// Is it here for the cooling markers? Or should it be outside of the cycle?
gcode += gcodegen.writer().set_speed(wipe_speed*60, "", gcodegen.enable_cooling_markers() ? ";_WIPE" : "");
gcode += gcodegen.writer().extrude_to_xy(
gcodegen.point_to_gcode(line.b),
-dE,
"wipe and retract"
);
if (! wipe_path.empty()) {
for (const Line &line : wipe_path.lines()) {
double segment_length = line.length();
/* Reduce retraction length a bit to avoid effective retraction speed to be greater than the configured one
due to rounding (TODO: test and/or better math for this) */
double dE = length * (segment_length / wipe_dist) * 0.95;
//FIXME one shall not generate the unnecessary G1 Fxxx commands, here wipe_speed is a constant inside this cycle.
// Is it here for the cooling markers? Or should it be outside of the cycle?
gcode += gcodegen.writer().set_speed(wipe_speed*60, "", gcodegen.enable_cooling_markers() ? ";_WIPE" : "");
gcode += gcodegen.writer().extrude_to_xy(
gcodegen.point_to_gcode(line.b),
-dE,
"wipe and retract"
);
}
gcodegen.set_last_pos(wipe_path.points.back());
}
// prevent wiping again on same path
@ -2577,9 +2579,11 @@ std::string GCode::travel_to(const Point &point, ExtrusionRole role, std::string
// use G1 because we rely on paths being straight (G0 may make round paths)
Lines lines = travel.lines();
for (Lines::const_iterator line = lines.begin(); line != lines.end(); ++line)
gcode += m_writer.travel_to_xy(this->point_to_gcode(line->b), comment);
if (! lines.empty()) {
for (const Line &line : lines)
gcode += m_writer.travel_to_xy(this->point_to_gcode(line.b), comment);
this->set_last_pos(lines.back().b);
}
return gcode;
}

5
src/libslic3r/GCode.hpp
View file

@ -155,11 +155,11 @@ public:
void do_export(Print *print, const char *path, GCodePreviewData *preview_data = nullptr);
// Exported for the helper classes (OozePrevention, Wipe) and for the Perl binding for unit tests.
const Vec2d& origin() const { return m_origin; }
const Vec2d& origin() const { return m_origin; }
void set_origin(const Vec2d &pointf);
void set_origin(const coordf_t x, const coordf_t y) { this->set_origin(Vec2d(x, y)); }
const Point& last_pos() const { return m_last_pos; }
Vec2d point_to_gcode(const Point &point) const;
Vec2d point_to_gcode(const Point &point) const;
Point gcode_to_point(const Vec2d &point) const;
const FullPrintConfig &config() const { return m_config; }
const Layer* layer() const { return m_layer; }
@ -360,6 +360,7 @@ protected:
size_t num_objects,
size_t num_islands);
friend class Wipe;
friend class WipeTowerIntegration;
};