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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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tests/fff_print/test_helpers.cpp
+4 -1
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@@ -223,7 +223,10 @@ DynamicPrintConfig multifilament_config(unsigned int filaments, std::initializer
// These are read by filament id during export but absent from filament_option_keys(),
// so set_num_filaments leaves them size 1; size them too, else out-of-range access.
const auto &defaults = FullPrintConfig::defaults();
for (const char *key : { "filament_type", "filament_vendor", "filament_start_gcode" })
for (const char *key : { "filament_type", "filament_vendor", "filament_start_gcode", "filament_change_length", "filament_change_length_nc",
"filament_ramming_travel_time", "filament_ramming_travel_time_nc",
"filament_ramming_volumetric_speed", "filament_ramming_volumetric_speed_nc",
"nozzle_temperature", "nozzle_temperature_initial_layer" })
static_cast<ConfigOptionVectorBase *>(config.option(key, true))->resize(filaments, defaults.option(key));
// flush_volumes_matrix must be sized filaments*filaments or export rejects it.