Unable to change the chamber temperature

Bambu Lab H2D Troubleshooting
1

Unable to change the chamber temperature during warm-up stage

When I’m prototyping small products (usually with ASA), I can’t manually edit/change the chamber temperature, either with Bambu Studio or directly on the machine. You can enter a lower temperature, but it won’t save it.

2

Since the printer processes G-code line by line, it won’t allow changes to those settings once the printer has started.

If you prefer to start with a lower chamber temperature for ASA, I recommend creating a separate filament profile with your desired lower ASA setting and selecting it before starting your print. You can always increase the chamber temperature manually later if needed.

This allows for two different ASA chamber temperature filament profile print options.

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3

I understand that the temperature is in the G code commands when the file is sent to the printer, but I’d still expect to have a manual override function when “Changing” the temperature threshold on the machine interface, like turning the light on & off, pausing the print, changing the fan speeds, etc. :slight_smile:

4

You should be able to change it while it’s 3D printing the part I can on mine, unless the newer firmware has changed that.

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5

I’ve just tried it!

So yes, you can in fact change the temperature, but only after the printer has started to print. It would be nice to be able to have full control during the warm-up stage (when you’ve forgotten to lower the temp after you’ve sent the file to the printer!) :slight_smile:

Thanks for your help @3DTech

@BambuLab, it would be a nice feature if printing could commence prior to the chamber getting up to temperature. As long as the bed heat was up to the desired temperature I see no reason to wait for the chamber to come up to optimal temp.
It could reduce the printing time by 10-15 minutes (depending how cold the chamber is) :slight_smile:

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6

When you are entering manual changes, those commands are inserted after the command that currently is being executed by the controller.
so when it is executing the chamber heating command (ie. 65C) and that command also pauses until that temperature has been reached, then you have to just wait it out.

that’s how the architecture works.

The only command that could possibly break in on that is the Stop command, but I am not even sure that one is able to interrupt a running command.

7

It would be a nice feature if printing could commence prior to the chamber getting up to temperature. As long as the bed was up to the desired temperature I see no reason to wait for the chamber to come up to optimal temp.
It could reduce the printing time by 10-15 minutes (depending how cold the chamber is)

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8

You’ll need to modify the start G-code to achieve the desired outcome. I believe these are the only two settings you’ll need to disable.

You can disable it by commenting it out like this.

;M191 S0 ; wait for chamber temp

;{if (overall_chamber_temperature >= 40)}
; M1002 gcode_claim_action : 49 ; this is a lcd screen message
; M191 S[overall_chamber_temperature] ; wait for chamber temp
;{endif}

Please be aware that modifying or disabling G-code is done at your own risk.

9

I have requested a software tweak, it will be an improvement to the product for little to zero cost.