2 Commits
Author SHA1 Message Date
maziggy 309e64b8a2 fix(ams): resolve a slot's K profile by index when the printer does not file per hotend (issue #3044)
An X2D with two AMS 2 Pro, one per hotend, showed a K value on every slot
of the first and nothing on any slot of the second. Configure Slot was
worse than blank there: the picker offered no matching profile, the slot
read as though nothing were bound, and choosing one changed nothing the
user could see. Both symptoms are one rule.

A calibration index can mean two different profiles on a dual-nozzle
machine -- on the maintainer's H2C, index 16 is the left hotend's black
PLA at K=0.018 and 15 is the right's at K=0.020 -- so the index is
resolved against the slot's own hotend, and a miss shows nothing rather
than the other nozzle's number. That is right whenever the printer files
its calibrations per hotend. This one files them per filament: the second
AMS's slots point at the same entries as the first, every entry tagged
with one extruder, and requiring a match found nothing at all.

The hotend now has to appear in the table the printer actually sent
before it is used to narrow anything. Where it does not, the index stands
on its own, which is what BambuStudio does for this same card --
AMSItem.cpp resolves it through get_pa_k_n_value_by_cali_idx, matching
cali_idx and nothing else. Where it does, nothing changes: the H2C case
still blanks rather than borrowing, and the other hotend's profiles stay
reachable under Other K profiles. The relaxed path still refuses an
answer when the candidates disagree on a value.

The premise that the table is always numbered per nozzle had been written
into three comments and two layers of code; it is corrected where it
appears.

Alongside it, in the same picker: the K-profile options rendered the
hotend suffix twice in the matching group and three times under Other, so
every option on a dual-nozzle printer read "... . Left . Left".
2026-09-07 19:23:48 +02:00
maziggy 14f46510ba File the printer's calibration table under the nozzle it belongs to (issue #2854)
The K value on an AMS slot card went blank after a while and came back after a
backend restart. It is not the MQTT merge: that preserves a tray's k correctly.
H2-series trays have no k to preserve. Verified against the H2 wire capture in
logs/vp_wire -- every tray reports cali_idx and nothing else -- so the number on
the card is resolved from that index against the printer's calibration table in
state.kprofiles, and that table was a single global list.

An extrusion_cali_get response is the complete table for one nozzle diameter,
and the printer answers whoever asks; BambuStudio's queries arrive on the same
report topic we subscribe to. Every response was assigned straight to
state.kprofiles, so any one answer stood for the whole printer. The nightly
GitHub backup asks for 0.2, 0.4, 0.6 and 0.8 in turn and finishes on 0.8, which
holds nothing on a 0.4+0.6 machine: logs/bambuddy.log records exactly that at
17:15 on 2026-08-25, and the table was empty from then until something refilled
it. Responses are now bucketed by the diameter they describe, so an empty answer
for a size the printer does not have clears only that size. The three assign
paths that look an index up by nozzle_diameter get the same fix for free -- they
were quietly finding nothing whenever the last response was for another nozzle,
which is what spoolman_inventory has been logging as a stale kp.

Bucketing makes state.kprofiles a union, and cali_idx is numbered per nozzle, so
the index alone no longer identifies a profile. The REST serializer has keyed on
(extruder, cali_idx) since c5e005586; the WebSocket one still keyed on the index
alone, which meant the first render of a card could be right and every update
after it wrong. Both now share one resolver. It goes through the extruder the
slot feeds, and where that does not single out one profile -- a single-nozzle
printer that has been swapped, so both its tables sit under extruder 0 -- it
falls back to which diameters are actually fitted. Where neither settles it the
card shows nothing, because a blank space is a smaller error than confidently
printing the other nozzle's number. Deliberately no loosening to a bare cali_idx
lookup on a miss: that is the cross-nozzle bleed the extruder keying was added
to stop.

Nothing read the table on connect, which is the other half of the report. It
arrived by luck -- a visit to Profiles or Configure Slot, a backup, or the
printer answering someone else -- so a Bambuddy nobody had opened showed a card
with no K values at all, and "restart and they come back" was the printer
happening to broadcast rather than anything we did. It is now read once per
connection, on the same latch the stale-print reconcile uses. Only the fitted
diameters are asked for, one request on a single-nozzle printer and two on a
dual; probing the four sizes blind is what the backup does and what blanked the
table. The edge is gated on a nozzle diameter being known as well as on the
state being known, because the first push_status is what makes the state known
and does not always carry the nozzle fields -- latching there would spend the
connection's one attempt on a printer that could not yet say what was fitted.

Adopting an unsolicited table now logs at debug. It was the quietest way for the
card to change underneath us and there was no way to see it in a support bundle.

Three test files gained nozzles=[] on their PrinterState stubs. The field has
always been on the dataclass; the connect edge is simply the first thing on that
path to read it.
2026-08-25 17:52:02 +02:00