It was a significant problem in early machines. Most now have thermal runaway protection. As long as your wires don’t short out, it shouldn’t be a problem.

And the only wires that have enough energy to be a problem are the heaters- hot ends, heated beds/enclosures.

The firmware keeps track of how much energy is going to them and will shut the printer down if the energy is inconsistent with the reported temperatures. (Aka thermal runaway protection.)

You can also usually add secondary thermistors and if they deviate too much, triggers the same result. (And the machine will usually start trilling to get attention, etc,)

It doesnt happen often ofcourse. It is super rare, but there are many horror storries on google. I think the biggest reason for fire hazard is a kitchen stove, still most people dont have any protection even there (including me).

These cans cost like 2-3 kg of filament and hopefully they will never be used and end up like a "waste of money". Im spending money on this hobby anyway and this upgrade might help me sleep better 😁

Sorry for anxiety my friend

Thx for sharing. Usefull information

This one would be more difiicult to mount in my cabinet, but the main reason Im eying can type is that I found multiple recommendations and also that thing cant be activated without flame afaik.

Im glad that people in this community dont have much experience with these, but that makes it more difficult to find the best product

My printer is behind shelly plug as well and I was thinking I could mount temperature sensor and smoke detector that shuts down printer through homeassistant and alarming me if needed. Testing and trusting that automation might be difficult tho. I do have camera as well, but that thing wouldnt help if shit happens while im in the deep sleep. Extinguisher would live on top of that.

Thx for input.

I agree with you mostly, but there are also unfortunate examples even with big eu brand as well. Im not paranoid, but home 3D printer is more like production machine than kitchen appliance imo. They have moving parts and print failures happen sooner or later. Fire in a kitchen is not that rare it seems anyway.

Before reading comments, I wasnt aware that prusa is selling fire suppression system, but I guess there is a reason for that

If we talk about low-end China printers then the answer is they might not be as safe

Bambu had to recall one of their printers for a faulty bed heating wire that either was causing or had the high likely to cause fires. We have robots with flame swords that we've trained to not burn our house down. Yes some robots are better built or trained than others but it's still a robot with a flame sword nonetheless.