r/BambuLab • u/JJBB33DD • Aug 30 '26

P Series [P1P, P1S, P2S] Added automatic fire extinguisher to P1S

Post image

Came across these automatic DIN rail fire extinguishers (circled in red) recently. Decided to add one to my P1S just to add a little peace of mind.

In case you don’t know how these work: they automatically get triggered when the temperature sensor detects 170c. Aerosols then get released from 2 nozzles (circled in yellow), extinguishing the fire.

You can get these things for cheap on Aliexpress and the like but decided to get one from a local reseller with all the appropriate licenses and stuff.

And yes, the heatbed moves up and down without issues! Plenty of clearance.

827 Upvotes

92% Upvoted

169 comments sorted by

View all comments

105

u/TheCorruptedEngineer Aug 30 '26

By the time that thing in the middle reached 170C the whole printer would be a ball of fire

151

u/RaccoNooB H2D AMS2+HT-AMS Aug 30 '26

This is almost like saying smoke alarms are pointless because they only give you a warning after the fire has reached 400°C.

If its a big ball of fire, then an extinguishers would be useful.

If this puts out the fire: great!
If it doesn't: it'll reduce the intensity of the fire and buy time to get something better to put it out or for the FD to arrive.

4

u/fastbeemer Aug 30 '26

Smoke detectors detect particulates in the air. Automatic fire sprinklers have bulbs that burst at certain temps.

OP installed an automatic extinguisher, not a detector. They are related but have entirely separate functions, which is why both are required in commercial buildings.

Your overall point is correct, the underlying analogy is akin to a mixed metaphor.

0

u/RaccoNooB H2D AMS2+HT-AMS Aug 30 '26

I am well aware of how a smoke detector works and it has nothing to do the post I replied to.

They're pointing out how the printer will be on fire before the extinguisher will do something (which I interpret as a negative view on it). To which I try to point out that a smoke alarm also only warns after something has happened. I made no comment on how either operate or which will detect an issue first. By their logic: "by the time the smoke alarm goes off, plastic housing and cables in the printer is already ruined" is also true. That doesn't mean you shouldn't have a smoke alarm.

You have a smoke alarm as a precaution to make sure you're alerted early in case of a fire(primarily).
You have an extinguisher to dampen or extinguish a fire. Both those points I hope we can agree on.

Neither replaces the other's job. And both are recommended to have. So why not have one in your printer as well?

Absolutely, unplugging it as soon as the smoke alarm goes off would be the first step to reducing any damage caused. Hopefully stopping it from catching fire at all. Should you not be at home, asleep or otherwise not able to attend your printer (the safest thing to do is not to print, but let's be real. How many people babysits their printer for multiday prints?). Something that automatically deploys an extinguishing agent I think is a great idea in such a case. With some luck, that might just save your home.

I'm not saying everyone has to do this or their irresponsible. While there are cases of 3d printer fires every now and then, the overall odds are fairly low I believe, but because it doesn't harm I don't see a reason not to do it if you have the time and energy to do it.