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4
Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
 maziggy
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45dc139c41 |
Print an H2C two-nozzle plate from the carriage it was levelled on
The two carriages were the wrong way round: extruder index 0 was treated as
the fixed hotend and index 1 as the swappable rack, and it is the other way
about. A plate using both was levelled with one nozzle and printed with the
other, several millimetres off the plate.
Three sources agree, and disagreed with the code. Telemetry reports
ams_extruder_map {'0': 1, '1': 0, '2': 0}. BambuStudio, dispatching a plate
that used all three of those AMS units, sent the filament from the unit on
extruder 1 to physical nozzle 1 and the ones on extruder 0 to rack positions
16 and 18, and that print completed. And the two constants could not both
have been right: _FIXED_NOZZLE_ID is 1 while the fixed extruder was 0, in a
scheme where physical nozzle id N sits on extruder N.
The old value came from the #2800 hardware A/B, where [17, -1, -1, 1] printed
in mid-air and [1, -1, -1, 17] printed correctly. That result stands -- it
established which wire worked. The extruder indices were not measured by it;
they were inferred by pairing the working wire with a slot_extruders list
produced by the 3MF reader that has since turned out to mis-read exactly
these files. The reasoning is recorded at the constants so a future
regression report is not re-litigated from scratch.
Also withholds nozzle_mapping entirely when more than one filament group
needs the rack. Two groups on one extruder means that extruder is a rack and
the plate wants a different hotend per group -- which physical slot each
takes is the slicer's choice against the live rack and is stated nowhere in
the file, since both groups can carry identical diameter and nozzle type.
Studio dispatched such a plate to 16 and 18; nothing here can reproduce that,
and answering anyway is what printed in mid-air, so the firmware picks.
Restores the fixed 32-entry padding that
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maziggy
|
dfeac792fb |
Stop an H2C refusing a multi-colour print as a hotend mismatch
The print uploaded, the printer took the command, and stopped at once with HMS 0500-4047 -- "the available hotend quantity or model does not match the sliced file". nozzle_mapping told the printer one of the plate's filaments went to no hotend while ams_mapping named the tray it comes from, and the firmware will not start a job on that contradiction. Each filament in a 3MF names the group it belongs to, and on every other dual-nozzle Bambu the group number is also the extruder index, so it was read as one. On a rack machine it is not: the rack carriage holds six hotends to the fixed carriage's one, so the slicer writes a group per nozzle rather than per carriage. The failing plate carried groups 0, 1 and 2 against a two-entry physical_extruder_map, and the filament in group 2 was dropped -- indistinguishable downstream from a slot the plate does not print, which is what reached the wire as -1. extract_nozzle_mapping_from_3mf now resolves the group through the table the file states for itself, the <nozzle id extruder_id> elements in slice_info.config. Files carrying no such table keep the direct index, so H2D slices are unaffected. A filament that still cannot be placed drops the whole mapping with a logged reason instead of half an answer: the firmware then picks its own nozzle, which is the pre-existing behaviour and far better than an answer that contradicts itself. Two related faults fixed in the same pass. The mapping was read across every plate in the file, so on a multi-plate project a slot took its extruder from whichever plate came last; it is now scoped to the plate being dispatched, in extract_filament_requirements as well. And the array is now one entry per filament slot, matching BambuStudio's own dispatch of [1, 16, 16] for a three-filament plate, rather than padded to a fixed 32. Verified against the file that failed: slot extruders [-1, 1, 0] became [0, 1, 0], and the wire [-1, 16, 1, -1 x29] became [1, 16, 1]. |
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maziggy
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e9d9e51a81 |
fix(h2c): send physical nozzle IDs for both carriages, not extruder indices (#2800)
The first pass at the H2C rack mapping had both of its hardware-derived values wrong, and the reporter's follow-up A/B on real hardware settled them. The rack does not feed extruder 0. A mixed-nozzle plate extracted as slots=[0, -1, -1, 1] with rack position 17 dispatched as [17, -1, -1, 1], and the rack nozzle printed several millimetres above the bed. The rack is extruder 1. Correcting only that is not enough. The fixed hotend answers to physical ID 1, not to its extruder index of 0, and forwarding the index produced [0, -1, -1, 17] -- a command the printer rejected outright rather than mis-printing. Translating both carriages gives [1, -1, -1, 17], and the same sliced file then cleaned, levelled and printed on the correct nozzle at the correct Z through to completion. Both values agree with three native Bambu Studio captures from the same machine, which carry [1, 17, ...] and [17, 1, ...] depending on filament slot order. An extruder index naming neither carriage now omits the field instead of reaching the wire as a physical ID that identifies no nozzle. The fixed-hotend-only path is unchanged but no longer a guess: Bambu Studio sends no nozzle_mapping at all for such a plate, which is what Bambuddy already did. Reported, diagnosed and hardware-verified by @tru3l3gend, who ran the mixed-nozzle A/B on both nozzles and captured what Bambu Studio sends for fixed-only and mixed plates. |
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maziggy
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ec26cba927 |
Resolve the H2C rack nozzle at dispatch instead of letting firmware pick (#2800)
An H2C ran its startup clean and bed levelling on one hotend, switched, and then printed several millimetres above the plate. The same job from Bambu Studio was fine. The H2C is the only model that mounts its nozzle from a rack of six, and a print command names that nozzle by physical rack position -- the firmware reports those as 16 to 21 -- not by the extruder index, 0 or 1, every other dual-nozzle printer uses. Bambuddy only ever had a rack position when a job arrived through the Virtual Printer, which captures Bambu Studio's pick and replays it (#1780). Anything queued from the library, an archive, the webhook or a slicer pipeline carried none, so the field was omitted and the firmware chose -- and its choice need not match what the file was sliced for. The scheduler now derives the per-slot extruder assignment from the file it is about to send, and the MQTT layer resolves it against the rack position the printer reports live. Both are needed: the file knows which side a slot prints from, only the printer knows which hotend is in the carriage, and it can be swapped from the touchscreen between queueing a job and printing it. Derived at dispatch rather than at creation because that is the first point knowing both the real printer and the real file -- an item can be created unassigned, reassigned later, or have its file swapped for a G-code-injected copy. One call therefore covers the print dialog, bulk library adds, the webhook and pipeline runs, and no column is needed. extract_nozzle_mapping_from_3mf is deliberately untouched. Its output feeds the AMS matcher, where nozzle_id is compared against a tray's extruder_id as a hard filter, and physical_extruder_map is what makes that comparison correct -- on an H2D it is [1, 0] and flips the two. Dropping the translation to suit the rack would send every dual-nozzle AMS match to the wrong extruder. The dense per-slot form is a separate function reusing the same output. Nothing here can fail a dispatch. The command is built and published with no exception handler above it, and the queue item is already committed as printing by then, so a bad input has to degrade to "firmware picks" rather than wedge the item. resolve_rack_nozzle_mapping validates every input and raises nothing; an unresolvable mapping, an unparseable value or an unknown rack position all omit the field, which is the behaviour that existed before. Slot IDs are bounded before the dense list is built: they come from the file, and one declaring filament id="50000000" would otherwise allocate a fifty-million-entry list on the dispatch path. Two things are not guessed. A job printing only from the fixed hotend is still left to the firmware, because that nozzle's physical ID is not confirmed by a known-good capture. And the rack is taken to feed extruder 0 from a single hardware observation -- if that is flipped, a one-sided job matches nothing and falls back to the old behaviour, so only a job using both nozzles at once could be harmed, which is what a second capture needs to confirm. Confined to the H2C throughout. Building the print command for 21 model spellings with and without the new argument changes exactly three of them -- H2C, O1C and O1C2. The other 18, including H2D and X2D, are identical. Reported by @tru3l3gend, who diagnosed it on real hardware against a working Bambu Studio dispatch, established the rack ID range and supplied a patch. |