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Avoid collisions when moving Z down #7208

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merged 3 commits into from
Oct 27, 2024
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Merged

Avoid collisions when moving Z down #7208

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7be1d2c
Avoid collisions when moving Z down
fritzw Oct 23, 2024
fdc1a81
Merge branch 'main' into fix_scarf_seam_collision_2
SoftFever Oct 25, 2024
37fba95
Merge branch 'main' into fix_scarf_seam_collision_2
SoftFever Oct 27, 2024
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6 changes: 6 additions & 0 deletions src/libslic3r/GCodeWriter.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -447,6 +447,12 @@ std::string GCodeWriter::travel_to_xyz(const Vec3d &point, const std::string &co
// this function, fix it first.
//std::terminate();

// Orca: If moving down during below the current layer nominal Z, force XY->Z moves to avoid collisions with previous extrusions
double nominal_z = m_pos(2) - m_lifted;
if (point(2) < nominal_z - EPSILON) { // EPSILON to avoid false matches due to rounding errors
this->set_current_position_clear(false); // This forces XYZ moves to be split into XY->Z
}

/* If target Z is lower than current Z but higher than nominal Z we
don't perform the Z move but we only move in the XY plane and
adjust the nominal Z by reducing the lift amount that will be
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