# Reported issues for Bambu Printer MCP

Pod holds 6 of 6 GitHub reports that passed its relevance review. This can include external user reports, maintainer-confirmed bugs, and concrete feature gaps. Treat them as evidence to inspect, not a count of distinct defects.

Back to [Bambu Printer MCP](/mcp/bambu-printer-mcp).

## Most discussed

### Identity check rejects an X2D when `raw.model_id` carries a print-job id ("Printer reported an unknown model identity; cannot verify this printer.")

Tags: [observed 2026-09-29] = seen on 2026-09-29; [source-derived] = read from upstream code; [inference] = my reasoning, please confirm. No credentials, access code or full serial are included.

## Summary

On an X2D, the printer status can contain `raw.model_id` set to a print-job identifier while `raw.model` is `"X2D"`. `observedIdentity()` in `src/safety/printer-state.ts` (added in PR #22, commit `f6860e9`) treats every declared value as a model identity. `model_id` here does not normalize…

[Read the thread](https://github.com/DMontgomery40/bambu-printer-mcp/issues/36) · 2026-09-30 · closed · external user · 2 comments

### Printbed clearing

I've been wondering about this for some time and it seems that someone's actually implemented it. This is a feature request based on a demo online: https://x.com/mattshumer_/status/2104777202684301750

[Read the thread](https://github.com/DMontgomery40/bambu-printer-mcp/issues/32) · 2026-09-29 · closed · external user · 2 comments

### H2C Support

Hi, I have a Bambu H2C and want to use this MCP server. The REMOTE-DEPLOYMENT.md mentions H2D/H2S patches but H2C isn't explicitly listed. Are the H2 patches available in the public npm package, or only in a private clone? Will H2C work with BAMBU_MODEL=h2d as a fallback?

[Read the thread](https://github.com/DMontgomery40/bambu-printer-mcp/issues/5) · 2026-05-24 · closed · external user · 2 comments

### A1 detected as A1M from serial prefix (039 / 030 swapped?)

**Version:** bambu-printer-mcp 1.1.22

My printer is a Bambu Lab **A1** (not the mini). Its serial number starts with `039`. `get_printer_status` reports `"model": "A1M"`, also when `BAMBU_MODEL=a1` is set.

In `dist/printers/bambu.js` the serial-prefix detection maps `039` → `A1M` and `030` → `A1`. As far as I know, it is the other way round: `039` = A1 and `030` = A1 mini.

The configured `BAMBU_MODEL` seems to be used for the actual limits, so this looks cosmetic. Maybe the explicit…

[Read the thread](https://github.com/DMontgomery40/bambu-printer-mcp/issues/39) · 2026-10-02 · closed · external user · 1 comment

### `profile-flatten.ts` resolves `inherits` but not `include`, so CLI slicing emits the generic start G-code (A1 and P1S: no AMS selection, no pressure advance, hard-coded nozzle temp)

## Summary

`src/slicer/profile-flatten.ts` walks the `inherits` chain but never reads the sibling
`include` array. For Bambu's own machine profiles that array is where the real machine
G-code lives, so the flattened profile silently falls back to the generic
`fdm_machine_common` start G-code. The slice succeeds, the 3MF looks fine, and the print
comes out wrong.

I hit this building my own tooling, made the same mistake, and traced it from a bad
physical print back to the profile loader. Your…

[Read the thread](https://github.com/DMontgomery40/bambu-printer-mcp/issues/12) · 2026-08-31 · closed · external user · 1 comment

### H2 series (H2C/H2D/H2S) crashes the MCP server: bambu-node throws "Printer model not supported!"

Running bambu-printer-mcp against a Bambu Lab H2C (LAN Only + Developer Mode, BAMBU_MODEL=h2c). The MCP server process exits roughly 20-30 seconds after every connection.

Stack trace from the Claude Desktop MCP log:

    Error: Printer model not supported!
        at TolerantBambuClient.onMessage (bambu-node/dist/index.js:333:16057)
        at MqttClient.listener (bambu-node/dist/index.js:333:12437)
        at MqttClient.emit (node:events:521:24)
    Node.js v24.18.0
    [bambu-printer] Server…

[Read the thread](https://github.com/DMontgomery40/bambu-printer-mcp/issues/7) · 2026-07-18 · closed · external user · 1 comment

## Most recent

The remaining reports are on [the project's issue tracker](https://github.com/DMontgomery40/bambu-printer-mcp/issues).