Internal code N9 (from BambuStudio resources/profiles/BBL/machine/Bambu Lab A2L.json),
serial prefix 26A19 (5-char, same shape as H2C's late 31B8B). Capabilities from
Bambu's official A2L specs page: linear rail, single FDM extruder + integrated
cutter/plotter, no Ethernet (2.4 GHz Wi-Fi only), low-rate chamber camera on
port 6000.
The BambuStudio profile's use_double_extruder_default_texture: true flag
describes two TOOL HEADS (FDM + cutter), not dual filament extrusion — A2L
must NOT be classified as dual-nozzle or AMS routing will target the deputy
slot and firmware rejects with 07FF_8012.
Registry updates: printer_models.py, firmware_check.py, virtual_printer/manager.py,
virtual_printer/mqtt_server.py, PrintersPage.tsx, SpoolBuddyAmsPage.tsx.
12 new test cases in TestA2LModel pin every dimension.
A1 and A1 Mini ship without a MicroSD slot at all - there is no
firmware-side "Store sent files on external storage" toggle and the
slicers don't surface a slicer-side equivalent either. The connection
diagnostic was reading state.store_to_sdcard (home_flag bit 11), which
is never set on these models, so the check fell through to fail for
every A1-series user. Combined with the absent slicer UI it left users
thinking Bambuddy was wrong about a setting their hardware does not
have.
New NO_EXTERNAL_STORAGE_MODELS frozenset in utils/printer_models.py
enumerates A1, A1 Mini, and their internal codes (N1, N2S, A04, A11,
A12). has_external_storage() returns False for those, True for
everything else. Unknown models default to True so the check stays
active for future Bambu lineup additions - new no-slot models must be
added to the set explicitly.
The diagnostic now short-circuits to skip before reading
store_to_sdcard when printer.model is in the set. X1, P1, P2S, H2,
and X2D are unchanged - the bit-off -> fail signal is still the right
read for them.
The companion FTP-upload-timeout symptom in the same bug report (ftp
code 28 from BambuStudio when sending to the proxy VP) is a separate
Docker-bridge-mode networking constraint, not addressed here.
N1 and N2S were flipped relative to every other registry that names
them - firmware_check.py (N2S -> "a1"), virtual_printer/manager.py
(both the model map and the serial-prefix map: N2S -> 039 = A1,
N1 -> 030 = A1 Mini), and printer_manager.py A1_MODELS all agree on
N2S = A1, N1 = A1 Mini. Only printer_models.py had it backwards, so
any path that resolved an A1-family printer by internal code rather
than serial prefix would silently misclassify.
Also fixes the matching comments in LINEAR_RAIL_MODELS - cosmetic only
(both codes were already in the frozenset) but kept the file
self-consistent.
New TestA1SeriesModelIds regression test pins both directions so a
future re-flip fails loudly.
Five follow-up fixes to cross-printer re-slicing, all surfaced while
testing archive re-slices.
1. Re-sliced archive now records the printer it was sliced FOR.
slice_and_persist_as_archive copied sliced_for_model from the source
archive, so re-slicing X1C->H2D still showed "X1C sliced". Read it
from the freshly-sliced 3MF's parsed metadata instead, falling back
to the source only when absent.
2. Real slicer rejections are surfaced instead of silently masked.
_run_slicer_with_fallback retried with the 3MF's embedded settings on
any sidecar 5xx — including genuine content rejections (object off
the bed, incompatible filament temps), which "succeeded" only by
re-slicing for the source's original printer. A new
_slicer_rejection_message detects the slicer's own error string and
surfaces it as a 400; the embedded-settings fallback is kept only for
true CLI crashes.
3. A failed slice opens an error modal, not a 3s toast. The slicer's
reason is actionable and a toast hides it before it can be read. New
AlertModal (acknowledge-only); SliceJobTrackerContext shows it on a
failed job. New slice.failedTitle key in all 9 locales.
4. Sliced files no longer report "0 g" filament usage. The sidecar
doesn't always populate the X-Filament-Used-* headers;
ThreeMFParser._parse_gcode_header now also reads the slicer's own
"total filament weight/length" from the G-code header, and both
slice-persist paths fall back to it when the sidecar reports 0.
5. Nozzle-class re-slice guard. Re-slicing across the single-nozzle <->
dual-nozzle boundary (e.g. X1C -> H2D) fails BambuStudio's
multi-extruder validation; both slice routes now reject it up front
with a clear 400. The dual-nozzle model classification — previously
an inline tuple duplicated across start_print and the K-profile
routes — is centralized into DUAL_NOZZLE_MODELS / is_dual_nozzle_model
in printer_models.py, consumed by all three sites and the guard.
Full cross-nozzle-class re-slicing (dual-nozzle project_settings
reconciliation) remains separately tracked.
Tests: _slicer_rejection_message, _canonical_printer_model,
guard_nozzle_class_reslice, is_dual_nozzle_model, the G-code-header
filament parse, AlertModal, and end-to-end slice-API coverage including
an X1C-archive-to-H2D 400. Backend ruff + i18n parity clean; frontend
build clean.
The Bambu Lab X2D (launched April 2026, dual-nozzle, enclosed, hardened
steel rod gantry, AMS 2 Pro compatible) identifies itself as internal
model code N6 via SSDP/MQTT, and real serials begin with 20P9. None of
these identifiers existed in Bambuddy's registries, so the camera
service fell back to the chamber-image protocol on port 6000 (X2D
doesn't speak it), firmware-check logged "Unknown printer model: N6",
and the dual-nozzle K-profile paths — gated on the H2D serial prefix
"094" — would have treated X2D as single-nozzle.
Backend:
- Register N6 → X2D across every registry (PRINTER_MODEL_ID_MAP,
PRINTER_MODEL_MAP, STEEL_ROD_MODELS, ETHERNET_MODELS,
CHAMBER_TEMP_SUPPORTED_MODELS, firmware-check API keys + wiki path,
virtual-printer SSDP/product/serial tables, DB vp_model_fixes).
- supports_rtsp(): match the X2 display-name prefix and the N6 internal
code; camera now routes to RTSP on port 322.
- Dual-nozzle serial prefix check in bambu_mqtt.delete_kprofile and
kprofiles.set_kprofile broadened to ("094", "20P9") — X2D now takes
the H2D-style cali_idx in-place edit path.
- is_h2d model gate in bambu_mqtt.start_print extended with "X2D" so
timelapse / bed_leveling / flow_cali / vibration_cali / layer_inspect
are sent as integers and external-spool ams_id 254/255 routing is
preserved (H2D-style deputy-nozzle addressing).
X2D uses hardened steel rods like P2S — it is intentionally placed in
STEEL_ROD_MODELS, not CARBON_ROD_MODELS. A regression-guard test pins
the classification.
Frontend:
- mapModelCode in PrintersPage and SpoolBuddyAmsPage handle N6 and X2D.
- Enclosure-door badge and airduct-mode whitelists include X2D.
- MaintenancePage.getMaintenanceWikiUrl routes X2D to P2S wiki URLs for
steel-rod lubrication, belt tension, cold-pull, and PTFE tube
(exported to enable direct unit testing).
Tests:
- test_printer_models.py: TestX2DModel (10 assertions).
- test_bambu_mqtt.py: X2D in start_print ams_mapping and is_h2d gate;
TestDeleteKProfileDualNozzleDetection across H2D, X2D, P2S, X1C.
- MaintenancePageWikiUrls.test.tsx: 15 assertions covering X2D, P2S
regression, X1C/H2D/A1Mini regression, and model-name normalisation.
Docs:
- README: added X2 series to the supported printers table.
- CHANGELOG: new entry under 0.2.3b4 Fixed.
Credit to @krautech for the report and debug bundle, and to @legend813
for PR #989 which seeded most of the registry changes — rod-type
classification was corrected (steel, not carbon) and the dual-nozzle /
K-profile / is_h2d gaps were added on top.
P2S uses hardened steel rods, not carbon fiber. Move P2S from
carbon rod classification to new steel_rod category with its own
"Lubricate Steel Rods" / "Clean Steel Rods" maintenance tasks.
maziggy