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Fix stringing between the model and the wipe tower (#15038)

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# Description

On multi-tool printers using the type 2 wipe tower, the travel to the
tower ignored the configured Z hop type and always used a plain vertical
hop, so the nozzle rose in place over the part and oozed instead of
lifting away with the travel. It now follows the filament's Z hop
setting, matching what the type 1 tower already does.
Only toolchange travels to a type 2 tower change. Normal Lift and z_hop
= 0 are unaffected, and no extrusion moves change in any mode.

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This commit is contained in:
SoftFever
2026-07-31 18:26:48 +08:00
committed by GitHub
parent 6a2a57bdf4 603a8f9c8f
commit ea7117b7ca
1 changed files with 13 additions and 1 deletions
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14
src/libslic3r/GCode.cpp
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@@ -1510,7 +1510,19 @@ static std::vector<Vec2d> get_path_of_change_filament(const Print& print)
if (travel_to_tower_now) { if (travel_to_tower_now) {
// FIXME: It would be better if the wipe tower set the force_travel flag for all toolchanges, // FIXME: It would be better if the wipe tower set the force_travel flag for all toolchanges,
// then we could simplify the condition and make it more readable. // then we could simplify the condition and make it more readable.
gcode += gcodegen.retract();
// Orca: pass the configured lift type, as append_tcr does above. lazy_lift() keeps
// the first type it is given, so the NormalLift default would pin this hop to a
// standing move. Slope and spiral both need a known head position.
LiftType lift_type = LiftType::NormalLift;
if (gcodegen.writer().filament() != nullptr && gcodegen.writer().is_current_position_clear()) {
ZHopType z_hop_type = ZHopType(gcodegen.config().z_hop_types.get_at(
gcodegen.get_filament_config_index((int) gcodegen.writer().filament()->id())));
if (z_hop_type == ZHopType::zhtAuto)
z_hop_type = ZHopType::zhtSpiral;
lift_type = gcodegen.to_lift_type(z_hop_type);
}
gcode += gcodegen.retract(false, false, lift_type);
gcodegen.m_avoid_crossing_perimeters.use_external_mp_once(); gcodegen.m_avoid_crossing_perimeters.use_external_mp_once();
if (!tcr.priming && gcodegen.last_pos_defined()) if (!tcr.priming && gcodegen.last_pos_defined())
gcode += travel_to_tower_gap(gcodegen, gcodegen.last_pos(), start_wipe_pos); gcode += travel_to_tower_gap(gcodegen, gcodegen.last_pos(), start_wipe_pos);