H2D Nozzle doesnt cool when not in use for multi nozzle prints #1446

New Issue

MrUnknownDE · 2026-04-05T17:47:38+02:00

MrUnknownDE commented

2026-04-05 17:47:38 +02:00

Originally created by @cowc1um on 12/2/2025

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.2 bd6cfd6

Operating System (OS)

Windows

OS Version

windows 11

Additional system information

No response

Printer

Bambu H2D

How to reproduce

When slicing and printing on h2d with both nozzles. No special actions required to reproduce

Actual results

when nozzle A is printing, if nozzle B has not been used yet, it is held at 140c. When it swaps over for nozzle B, nozzle A will be kept at full printing temp for the whole layer while nozzle B is printing its part. When it swaps back to nozzle A, nozzle B is kept at full material temp while A is printing and this repeats until printing is complete

Expected results

The inactive nozzle should have target temp of 0 once all calibration is complete. and subsequently when the nozzle has finished its portion of the layer, temp target should drop to 0 while the other nozzle is printing, mirroring bambu studios behaviour of the nozzle. If not, it requires significant priming prior to printing and also causes underextrusion, especially visible on top layers

Project file & Debug log uploads

NA

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @cowc1um on 12/2/2025* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.2 bd6cfd6 ### Operating System (OS) Windows ### OS Version windows 11 ### Additional system information _No response_ ### Printer Bambu H2D ### How to reproduce When slicing and printing on h2d with both nozzles. No special actions required to reproduce ### Actual results when nozzle A is printing, if nozzle B has not been used yet, it is held at 140c. When it swaps over for nozzle B, nozzle A will be kept at full printing temp for the whole layer while nozzle B is printing its part. When it swaps back to nozzle A, nozzle B is kept at full material temp while A is printing and this repeats until printing is complete ### Expected results The inactive nozzle should have target temp of 0 once all calibration is complete. and subsequently when the nozzle has finished its portion of the layer, temp target should drop to 0 while the other nozzle is printing, mirroring bambu studios behaviour of the nozzle. If not, it requires significant priming prior to printing and also causes underextrusion, especially visible on top layers ### Project file & Debug log uploads NA ### Checklist of files to include - [ ] Log file - [ ] Project file ### Anything else? _No response_

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Reference: github/OrcaSlicer#1446