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Clamp gap-entry scrub excursions to the wipe tower margin

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The dry drag-out and the flat-ironing spiral could leave the margin band no
tower envelope accounts for (the ironing area is unbounded user input);
truncate them to WIPE_TOWER_MARGIN around the tower outline instead of
skipping the scrub.
This commit is contained in:
SoftFever
2026-08-03 15:23:54 +08:00
parent 1e0fb1a0ae
commit 4d81f0c181
1 changed files with 19 additions and 7 deletions
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26
src/libslic3r/GCode/WipeTower2.cpp
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@@ -735,14 +735,23 @@ public:
float edge_length = std::sqrt(area);
Vec2f box_max = center + Vec2f{step_length, step_length};
Vec2f box_min = center - Vec2f{step_length, step_length};
// The ironing area is unbounded user input; keep the spiral inside the margin band
// around the tower outline that every tower envelope already accounts for.
// step_length is the perimeter line width, and writer coordinates are offset
// from the tower outline by m_y_shift in y.
const float lim = float(WIPE_TOWER_MARGIN) - step_length / 2.f;
const Vec2f clamp_min{-lim, -lim - m_y_shift};
const Vec2f clamp_max{m_wipe_tower_width + lim, m_wipe_tower_depth + lim - m_y_shift};
int n = std::ceil(edge_length / step_length / 2.f);
if (n <= 0)
return;
while (n--) {
travel(box_max.x(), m_current_pos.y(), feedrate);
travel(m_current_pos.x(), box_max.y(), feedrate);
travel(box_min.x(), m_current_pos.y(), feedrate);
travel(m_current_pos.x(), box_min.y(), feedrate);
const Vec2f lap_max{std::min(box_max.x(), clamp_max.x()), std::min(box_max.y(), clamp_max.y())};
const Vec2f lap_min{std::max(box_min.x(), clamp_min.x()), std::max(box_min.y(), clamp_min.y())};
travel(lap_max.x(), m_current_pos.y(), feedrate);
travel(m_current_pos.x(), lap_max.y(), feedrate);
travel(lap_min.x(), m_current_pos.y(), feedrate);
travel(m_current_pos.x(), lap_min.y(), feedrate);
box_max += Vec2f{step_length, step_length};
box_min -= Vec2f{step_length, step_length};
@@ -1913,11 +1922,14 @@ void WipeTower2::toolchange_Wipe(
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;
// Keep the dry scrub inside the margin band around the tower outline that
// every tower envelope already accounts for.
const float scrub_lim = float(WIPE_TOWER_MARGIN) - m_perimeter_width / 2.f;
writer.extrude(writer.x() + ironing_length, writer.y(), wipe_speed);
const Vec2f iron_end = writer.pos();
writer.retract(retract_length, retract_speed);
writer.travel(writer.x() - 1.5f * ironing_length, writer.y(), 600.f);
writer.travel(writer.x() + 0.5f * ironing_length, writer.y(), 240.f);
const Vec2f iron_end(writer.x() + ironing_length, writer.y());
writer.travel(std::clamp(writer.x() - 1.5f * ironing_length, -scrub_lim, m_wipe_tower_width + scrub_lim), writer.y(), 600.f);
writer.travel(std::clamp(writer.x() + 0.5f * ironing_length, -scrub_lim, m_wipe_tower_width + scrub_lim), writer.y(), 240.f);
writer.spiral_flat_ironing(writer.pos(), m_filpar[m_current_tool].tower_ironing_area, m_perimeter_width, flat_iron_speed);
writer.travel(iron_end, wipe_speed);
writer.retract(-retract_length, retract_speed);