Anycubic Kobra S1: problems, parts and running costs

Checked: 2026-10-17

Summary

Owners most often report Anycubic Slicer Next limitations (no purge-level control, no purge-object support and no waste reporting), auto-leveling failures (error 11534), firmware error 10409 after updates, and a pinched filament-sensor wire [1][2][11][12]. Running costs are filament (including multicolor purge waste), replacement nozzles and activated carbon filters; the research gives no typical yearly total [1][5]. It is strong value at $349 standalone or $399 for the Combo (Anycubic US store, September 2026); above $600 standalone the slicer limits get harder to justify [19][1].

Common problems and fixes

Filament waste on color changes — significant “poop” during multicolor printing, comparable to Bambu Lab machines but with less software control to reduce it; CGMagazine recommends printing a “poop basket” next to the machine [1][2][3][4].
Auto-leveling failures — error 11534 (auto leveling failed) is reported, with some owners suspecting strain-gauge sensor degradation over time; the Anycubic wiki publishes a troubleshooting guide [12].
Firmware error 10409 — “Device Runtime Error” appears after firmware updates, sometimes related to tree support in the slicer or communication faults between mainboard and print head; the wiki publishes a troubleshooting guide [11].
Filament sensor wire — a pinched blue wire connecting to the filament sensor is a known failure point; Anycubic has shipped replacement parts [7].
Camera connectivity — the built-in camera fails to connect in the mobile app at a high rate, with one owner reporting a 70%+ failure rate [10].
Multi-filament slowdown — color changes stretch print times dramatically: a 43-minute single-color print took 14 hours in TechRadar’s multicolor testing [3].
TPU feeding — the flexible filament and long PTFE tube path can cause feeding difficulties [2].

Warranty: 1 year for 3D printers, as stated on Anycubic’s product pages [5].

Parts and consumables

Replacement nozzle — a consumable replaced as it wears; the hotend comes apart and can be replaced without tools [3].
Activated carbon filter — for the enclosure; replaced periodically [1].
Filament — the ongoing consumable, replaced every kilogram actually extruded, including failed prints and purge waste.
Strain-gauge sensor — not readily available from Anycubic’s parts catalog, so a leveling failure can mean contacting support rather than swapping a part [12].
ACE Pro expansion — the Combo’s 4-color limit expands to 8 colors with a second ACE Pro, an additional cost [3].

Yearly running cost

Not enough data for a typical owner’s yearly total. The known recurring costs are filament (including multicolor purge waste), replacement nozzles, activated carbon filters, and potential ACE Pro expansion [1][5]. The Combo needs two wall outlets because the ACE Pro has its own power supply [3]. Maintenance is ordinary: regular bed cleaning, nozzle cleaning, and the full calibration sequence — about 10 minutes — when print quality drifts [5][7].

When it is a good buy

Price thresholds outside Amazon, with store and month-year:

$349 standalone (regular $549) and $399 Combo — Anycubic US store, September 2026 [19].
$401 standalone (regular $631) and $459 Combo (regular $861) — Anycubic US store, earlier [5].
$599 early bird, $629 and $649 standard retail — 3DPrinting.com launch pricing, January 2025 [16].
$699 on sale, $829 retail — Tom’s Hardware, May 2025 [1].
$400 standalone and $600 Combo — CNET, March 2025 [2].
$749.99 MSRP for the Combo — CGMagazine, May 2025 [4].
About $429 for the Combo against about $849 for the Bambu Lab P1S Combo — Great Meets comparison, November 2025 [17].

At $450 or less standalone, or $550 or less for the Combo, the S1 offers strong value: enclosed CoreXY, 600 mm/s speed, 320 °C hotend and, in the Combo, multicolor with active drying [2][3]. In the $450-600 standalone range, compare the Bambu Lab P1S, Creality K1 and QIDI Q2 for software ecosystem and reliability. Above $600 standalone, the slicer limitations and lack of open-source firmware get harder to justify.

Named alternatives: the Bambu Lab P1S Combo at about $849 (Great Meets, November 2025) is the better choice if software ecosystem and reliability matter more than the lower hardware price [17]. The Creality K1 and QIDI Q2 are the better choices to compare in the $450-600 standalone range [1].