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Belt validation: refuse a brim next to a purge tower object

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The purge plan moves objects onto a common layer grid after the brim bands are
built, so the two cannot share a print. The prime tower setting alone still does
not block a brim. The missing-prism warning now counts the filaments the objects
use, as the GUI does.
This commit is contained in:
harrierpigeon
2026-10-02 12:46:44 -05:00
parent 997fac8752
commit 550229b0fa
3 changed files with 32 additions and 6 deletions
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src/libslic3r/Print.cpp
+8 -4
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@@ -1420,10 +1420,14 @@ StringObjectException Print::validate(std::vector<StringObjectException> *warnin
return { L("Draft shield is not compatible with belt printer mode.") };
// Belt brim spans many layers and owns the layers below the object, which
// spiral vase cannot share. The prime tower setting is no obstacle: belt
// printers never print the classic tower, and the belt purge prism is an
// ordinary object that never takes a brim.
// neither the belt purge tower nor spiral vase can share (the purge plan moves
// objects onto a common layer grid after the brim bands are built). The prime
// tower setting alone is no obstacle: it stays on for any multi-filament
// project, and belt printers never print the classic tower.
if (this->has_belt_brim()) {
if (this->has_belt_purge_tower())
return { L("Brim is not compatible with the belt purge tower. "
"Disable one of them.") };
if (m_config.spiral_mode.value)
return { L("Brim is not compatible with spiral vase mode on a belt printer. "
"Disable one of them.") };
@@ -1558,7 +1562,7 @@ StringObjectException Print::validate(std::vector<StringObjectException> *warnin
// the tower was generated) changes filament with nowhere to purge.
if (m_config.belt_printer.value && m_config.enable_belt_purge_tower.value
&& m_config.print_sequence != PrintSequence::ByObject
&& ! m_config.spiral_mode.value && extruders.size() > 1 && ! this->has_belt_purge_tower()) {
&& ! m_config.spiral_mode.value && this->object_extruders().size() > 1 && ! this->has_belt_purge_tower()) {
StringObjectException warningtemp;
warningtemp.string = L("The belt purge tower is enabled but the project has no purge tower object; "
"filament changes will not be purged. Open the project in the application "