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Bracket a toolchange's own gcode against FanMover splitting its moves (#15904)

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FanMover could split a move inside change_filament_gcode to place a delayed fan command. It computed the split point from the last position the G-code set, but on Bambu printers the firmware moves the head during the T command, so the inserted waypoint sent the head to a spot the template never visits (#15789).

Both toolchange paths, set_extruder() and the Type1 append_tcr(), now wrap the template output in ;_FAN_MOVER_SKIP_START/END tags when fan speed-up or kick-start is on. FanMover keeps fan commands inside them where they are and drops the tags from the output. multifilament_config() also sizes the per-filament options that the wipe tower reads by index.
This commit is contained in:
Fernando Marino`
2026-10-12 14:26:20 -05:00
committed by GitHub
parent 3ca182a98e
commit 1494de66de
4 changed files with 96 additions and 2 deletions
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src/libslic3r/GCode/FanMover.cpp
+5
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@@ -445,6 +445,11 @@ void FanMover::_process_gcode_line(GCodeReader& reader, const GCodeReader::GCode
std::string extrusion_string = line.raw().substr(6, line.raw().size() - 6);
current_role = ExtrusionEntity::string_to_role(extrusion_string);
}
if (line.raw().rfind(";_FAN_MOVER_SKIP_", 0) == 0) {
// Internal markers: read here, then dropped from the output.
m_is_custom_gcode = line.raw().rfind(";_FAN_MOVER_SKIP_START", 0) == 0;
time = -1;
}
if (line.raw().size() > 16) {
if (line.raw().rfind("; custom gcode", 0) != std::string::npos) {
if (line.raw().rfind("; custom gcode end", 0) != std::string::npos)