An order produces what it still owes by cloning an existing queue item for
the same plate. That row is the only record of the printer target, AMS
mapping and print options the user chose, so deleting the last one left the
order reporting work outstanding that nothing could produce, and no way to
close it out: Cancel was hidden unless there were pending items to cancel,
which by then there were none.
Deleting an order's last surviving run for a plate now cancels it instead.
A cancelled run does not satisfy a target, so the order still owes the print
and can still make it. A completed run is exempt and still deletes outright
-- rewriting it as cancelled would falsify what the order produced.
Also: the response reports per plate whether anything is left to clone, so
the card explains a stranded plate rather than offering a button that can
only fail; dispatch skips a stranded plate instead of aborting the whole
order; and Cancel is offered for any active order.
The Vortek rack holds six hotends, and a multi-colour plate is sliced to
use a different one per colour so it can skip the purge. Which of the six
each colour takes is not in the 3MF. The same plate, sliced and sent twice
from Bambu Studio with a different choice each time, produces two files
that differ only in rounding in the last digit of a few extrusion figures
-- the filament grouping, the toolchange stream, the 120 nozzle-change
markers and project_settings.config are all identical. The choice travels
only in the dispatched nozzle_mapping.
Bambuddy had no way to state it, so those plates went out with no nozzle
assignment at all and the printer chose for itself. That is what levelled
on one hotend and printed with another, millimetres above the plate.
Every rack-bound filament now carries a position picker beside its AMS
slot dropdown, listing all six with the nozzle each holds. An empty
position, or one holding the wrong diameter or flow type, is shown greyed
out with the reason rather than hidden, so someone looking for position 4
finds it. The choice is per filament *group* rather than per slot, because
a group is one hotend: two filaments the slicer grouped together share it
and cannot point at different positions.
Nothing has to be picked. Positions are assigned automatically, preferring
one already loaded with that colour, which on the plate this was built
against reproduces Bambu Studio's own pick exactly.
A nozzle currently picked up onto the carriage is offered too. The
firmware drops its rack position from the report entirely rather than
sending a placeholder (#943), and refusing it would rule out the position
most likely to be wanted -- the one the last print left mounted. Only
recoverable when exactly one position is missing; two gaps are genuinely
ambiguous and stay unavailable.
Positions are re-checked at dispatch, not just when queued, because the
rack can be re-loaded in between. The two failure modes differ on purpose:
an explicitly chosen position that no longer fits stops the print, names
what the position now holds, and deletes the uploaded file from the SD
card so it cannot be started by hand either -- an operator who named a
hotend must not silently get a different one. An automatic assignment that
cannot be made instead falls back to letting the firmware choose, which is
what happened before any of this existed.
The pick is stored as {group: position} rather than as the expanded
nozzle_mapping, though that is what goes on the wire. That column means
"Bambu Studio decided, forward verbatim", and only the group-and-position
form can be re-checked against what is actually mounted at dispatch.
The existing multi-rack refusal in extract_nozzle_mapping_from_3mf stays.
It still guards the #2800 fallback, which can only ever name one rack id.
Measured on the maintainer's H2C: rack position n is physical nozzle id
15 + n, confirmed by cross-referencing two captured dispatches against
Bambu Studio's own dialog. extruder_max_nozzle_count names which carriage
is the rack straight from the file, and is read rather than assumed -- a
fourth independent confirmation of the carriage indices fixed in 45dc139.
The print dialog is also wider, on every printer. Its filament rows carry
the most horizontal content in it and adding a picker truncated names to
"Bamb...". The column widths themselves only change on a rack machine.
Tests: 44 unit covering the plan, the resolver, the mounted-nozzle
recovery and every refusal; 9 dispatch integration asserting the two real
captures end to end; 7 API round-trip; 33 frontend. The API ones exist
because two integration bugs got through a green suite that tested the
pieces and not the seams -- the group data reached only one of the three
filament-requirements routes, and the field was declared on every schema
except the create one, where Pydantic dropped it in silence.
Printing a multi-plate file in different quantities per plate meant
queueing each plate separately and tracking the counts by hand: one
shared Quantity field cannot say "plate 1 once, plate 2 twice, plate 3
three times". Each selected plate now carries its own quantity, and the
submission becomes an order on a new Batches tab.
The point is the distinction the old flat batch could not express.
print_batch_plates stores how many runs of each plate were wanted,
separately from what was queued, so a run that fails, is cancelled or is
skipped does not satisfy a target -- the order goes on saying it owes a
print instead of quietly under-delivering. Queue remaining re-queues
exactly what is missing, for the whole order or one plate, by cloning
the most recent item for that plate: that inherits the printer or model
target, AMS mapping, filament overrides and print options along with the
validation they already passed, rather than re-serialising twenty fields
through a template that would drift from the model the first time
someone adds a column. Clones append to the end of the relevant
printer's queue and take the same advisory lock the add-to-queue route
does; positions are per-printer sequences, not global.
Cost is measured, not estimated. print_log_entries gains queue_item_id,
set where the queue item is already in scope, so each run's material and
energy are attributed through the item that produced them -- an
unrelated reprint of the same archive never lands in an order's total,
and a multi-plate order gets each plate's own cost rather than the whole
file's via the plate-scoped estimate from #2614. Before any run has
completed there is no honest figure, so cost reads as unknown instead of
a fabricated 0.00.
The Batches tab wires up GET /queue/batches, which has been unreferenced
since the batch MVP shipped, along with six locale keys that were
translated and never used. It is a separate tab because an order
outlives the queue that produced it: once its runs finish they leave the
active queue, so Queue and History each hold half the picture.
completed was not a reachable status before now, so every batch created
since April is still marked active however long ago its last print
finished -- 73 of them on the development install. A startup pass closes
out the finished ones: those whose runs all completed become completed,
and groupings whose items were all cancelled become cancelled, which is
what they are. Not applied to orders, which state their intent
independently of their runs and still owe the work. Only batches with
nothing queued or printing are considered, and repeating the pass also
catches an order whose last run landed while the process was down.
Batches with neither items nor targets are no longer listed at all --
empty shells left when a grouping's items went with their source
archive.
Dispatch applies the same source-file gates as POST /queue/. It creates
queue items, so without them it would be a weaker door to the same
outcome; the archive and library-file checks move into shared helpers
so a third route cannot drift from them.
maziggy