Fix wipe tower issues with SEMM and ramming turned off

src/libslic3r/GCode.cpp

@@ -766,11 +766,15 @@ static std::vector<Vec2d> get_path_of_change_filament(const Print& print)
                 gcodegen.m_wipe.reset_path();                                           // We don't want wiping on the ramming lines.
             toolchange_gcode_str = gcodegen.set_extruder(new_extruder_id, tcr.print_z); // TODO: toolchange_z vs print_z
             if (gcodegen.config().enable_prime_tower) {
-            deretraction_str += gcodegen.writer().travel_to_z(z, "restore layer Z");
-            Vec3d position{gcodegen.writer().get_position()};
-            position.z() = z;
-            gcodegen.writer().set_position(position);
-            deretraction_str += gcodegen.unretract();
+                // ORCA: For SEMM, this move causes the nozzle to crash on the wipe tower for the final wipe layer.
+                // TODO: Requires validation whether this is an issue even with multi extruder printers
+                if(!this->m_single_extruder_multi_material){
+                    deretraction_str += gcodegen.writer().travel_to_z(z, "restore layer Z");
+                    Vec3d position{gcodegen.writer().get_position()};
+                    position.z() = z;
+                    gcodegen.writer().set_position(position);
+                }
+                deretraction_str += gcodegen.unretract();
             }
         }
 

src/libslic3r/GCode/WipeTower2.cpp

@@ -893,7 +893,8 @@ void WipeTower2::toolchange_Unload(
 	float remaining = xr - xl ;							// keeps track of distance to the next turnaround
 	float e_done = 0;									// measures E move done from each segment   
 
-    const bool do_ramming = m_semm || m_filpar[m_current_tool].multitool_ramming;
+    // Orca: Do ramming when SEMM and ramming is enabled or when multi tool head when ramming is enabled on the multi tool.
+    const bool do_ramming = (m_semm && m_enable_filament_ramming) || m_filpar[m_current_tool].multitool_ramming;
     const bool cold_ramming = m_is_mk4mmu3;
 
     if (do_ramming) {
@@ -1544,7 +1545,8 @@ void WipeTower2::plan_toolchange(float z_par, float layer_height_par, unsigned i
 	float length_to_extrude = volume_to_length(0.25f * std::accumulate(m_filpar[old_tool].ramming_speed.begin(), m_filpar[old_tool].ramming_speed.end(), 0.f),
 										m_perimeter_width * m_filpar[old_tool].ramming_line_width_multiplicator,
 										layer_height_par);
-	float ramming_depth = (int(length_to_extrude / width) + 1) * (m_perimeter_width * m_filpar[old_tool].ramming_line_width_multiplicator * m_filpar[old_tool].ramming_step_multiplicator) * m_extra_spacing_ramming;
+    // Orca: Set ramming depth to 0 if ramming is disabled.
+    float ramming_depth = m_enable_filament_ramming ? ((int(length_to_extrude / width) + 1) * (m_perimeter_width * m_filpar[old_tool].ramming_line_width_multiplicator * m_filpar[old_tool].ramming_step_multiplicator) * m_extra_spacing_ramming) : 0;
     float first_wipe_line = - (width*((length_to_extrude / width)-int(length_to_extrude / width)) - width);
 
     float first_wipe_volume = length_to_volume(first_wipe_line, m_perimeter_width * m_extra_flow, layer_height_par);