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Iron the purge start out through the skip-point gap in WipeTower2

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Port the BBL tower's entry line ironing: extrude the first 3 mm of the
purge, retract, drag the nozzle 1.5x back out through the wall gap at
F600, creep back at F240 and unretract, so the toolchange start blob
ends up in the gap instead of on the wall. Fires only when the purge
starts at the left-edge entry heading right (in-place toolchangers);
SEMM ram/cooling wipes start mid-box and the priming line has no wall,
so both keep their previous output.
This commit is contained in:
SoftFever
2026-07-28 21:21:50 +08:00
parent 5b475e5e98
commit bef47b2c70
2 changed files with 26 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
src/libslic3r/GCode/WipeTower2.cpp
View File

@@ -1571,11 +1571,11 @@ std::vector<WipeTower::ToolChangeResult> WipeTower2::prime(
toolchange_Load(writer, cleaning_box); // Prime the tool.
if (idx_tool + 1 == tools.size()) {
// Last tool should not be unloaded, but it should be wiped enough to become of a pure color.
toolchange_Wipe(writer, cleaning_box, wipe_volumes[tools[idx_tool-1]][tool], false);
toolchange_Wipe(writer, cleaning_box, wipe_volumes[tools[idx_tool-1]][tool], false, true);
} else {
// Ram the hot material out of the melt zone, retract the filament into the cooling tubes and let it cool.
//writer.travel(writer.x(), writer.y() + m_perimeter_width, 7200);
toolchange_Wipe(writer, cleaning_box , 20.f, false);
toolchange_Wipe(writer, cleaning_box , 20.f, false, true);
WipeTower::box_coordinates box = cleaning_box;
box.translate(0.f, writer.y() - cleaning_box.ld.y() + m_perimeter_width);
toolchange_Unload(writer, box , m_filpar[m_current_tool].material, m_filpar[m_current_tool].first_layer_temperature, m_filpar[tools[idx_tool + 1]].first_layer_temperature);
@@ -2013,7 +2013,8 @@ void WipeTower2::toolchange_Wipe(
WipeTowerWriter2 &writer,
const WipeTower::box_coordinates &cleaning_box,
float wipe_volume,
bool interface_layer)
bool interface_layer,
bool priming)
{
// Increase flow on first layer, slow down print.
writer.set_extrusion_flow(m_extrusion_flow * (is_first_layer() ? 1.18f : 1.f))
@@ -2056,6 +2057,26 @@ void WipeTower2::toolchange_Wipe(
}
float traversed_x = writer.x();
// BBS gap wall: iron the first few mm of the purge, then drag the retracted nozzle
// back out through the wall gap so the toolchange start blob is not left on the wall.
// WT2's entry gap always sits at the left-edge entry point, so only iron when the
// purge actually starts there heading right (in-place toolchangers do; SEMM
// ram/cooling moves leave the nozzle mid-box, far from any gap).
if (i == 0 && m_use_gap_wall && !interface_layer && !priming && m_left_to_right &&
writer.x() - xl < 2.5f * line_width) {
float ironing_length = 3.f;
if (xr - writer.x() < ironing_length)
ironing_length = std::max(xr - writer.x(), 0.f);
const float retract_length = m_filpar[m_current_tool].retract_length;
const float retract_speed = m_filpar[m_current_tool].retract_speed * 60.f;
writer.extrude(writer.x() + ironing_length, writer.y(), wipe_speed);
writer.retract(retract_length, retract_speed);
writer.travel(writer.x() - 1.5f * ironing_length, writer.y(), 600.f);
writer.travel(writer.x() + 1.5f * ironing_length, writer.y(), 240.f);
writer.retract(-retract_length, retract_speed);
}
if (m_left_to_right)
writer.extrude(xr - (i % 4 == 0 ? 0 : 1.5f*line_width), writer.y(), wipe_speed);
else

3
src/libslic3r/GCode/WipeTower2.hpp
View File

@@ -361,7 +361,8 @@ private:
WipeTowerWriter2 &writer,
const WipeTower::box_coordinates &cleaning_box,
float wipe_volume,
bool interface_layer);
bool interface_layer,
bool priming = false);
Polygon generate_support_rib_wall(WipeTowerWriter2& writer,