This is a request for implementing Gcode “M191 Snn”, “wait for chamber temperature to reach nn”. Since there is no active heating of the chamber, the chamber temperature depends on the heating of the bed and it can take some 15 minutes before it reaches 45°C and actual printing with ABS, ASA, etc.…

For the sake of convenience, how about editing the title to read “[Feature Request] Implement G-Code M191”? It’s great if a thread title explains what the thread is about!

Because Snapmaker is not actively reading all threads, open a ticket please: [image] How to issue a firmware feature request? U1 Toolchanger And shoot a ticket at: https://snapmaker.formcrafts.com/u1-troubleshooting-request There you could pick feature reques…

A thread means we can chew it over as well.

Are you sure about that? This is a really small forum. Trust me… They read them.

Especially if you ask @Simon_Zhi to help, please

Just use a macro to create M191 gcode_macro M191 gcode: { set min = params.S|float } ;; From Heat-Soak Macro ;; fire up the heater SET_HEATER_TEMPERATURE HEATER=heater_bed TARGET=105 ;; run the fans to circulate air _FAN_SOAK ;; home the printer G28 ;; put the bed and nozzle where they’…

If you post it here, they might read it. If you send a ticket, they will read it.

I wouldn’t want to discourage things being discussed on the open forum, there may be alternative ideas which would not otherwise get aired.

I’m not excluding either option, but I do think it might be better to discuss an idea and refine it before pulling the trigger on raising it with staff. Somebody comes along with “I need X”, then the community kicks it around for a while and refines the idea to Y, but then to accommodate a slightly…

[Feature Request] Implement G-Code M191

U1 Toolchanger

xchrisd April 12, 2026, 5:28pm 3

Because Snapmaker is not actively reading all threads, open a ticket please:

Topic		Replies	Views
Waiting for Chamber Temperature U1 Toolchanger	18	565	April 14, 2026
M190 and M109 not waiting Snapmaker 2.0 (3-in-1)	3	1071	May 20, 2021
Better start gcode to mitigate first layer clogs (all-metal hotends) J1/J1s IDEX	7	421	February 3, 2025
Chamber Preheat Feature Requests	9	203	September 15, 2026
After print finishes, notify when bed temperature drops to room temperature Feature Requests Firmware , U1	1	65	September 14, 2026

[Feature Request] Implement G-Code M191

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