3DPrinting

22825 readers

194 users here now

3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.

The r/functionalprint community is now located at: or !functionalprint@fedia.io

There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml

Rules

No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
Be respectful, especially when disagreeing. Everyone should feel welcome here.
No porn (NSFW prints are acceptable but must be marked NSFW)
No Ads / Spamming / Guerrilla Marketing
Do not create links to reddit
If you see an issue please flag it
No guns
No injury gore posts

If you need an easy way to host pictures, https://catbox.moe/ may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is ![](URL)

Moderation policy: Light, mostly invisible

founded 3 years ago

MODERATORS

j4k3@lemmy.world

andypiper@lemmy.world

GrayBackgroundMusic@lemmy.zip

Did Bambu Lab change something on the A1 recently? (sh.itjust.works)

submitted 2 days ago by akilou@sh.itjust.works to c/3dprinting@lemmy.world

20 comments fedilink hide all child comments

I have my A1 plugged into a soecial surge protector that provides power to the rest of the outlets if the one trigger outlet draws enough power. So the printer is always on so that I can send stuff to it but doesn't draw a lot of power. When it's heating up and printing the power draw increases enough to trigger the rest of the outlets and a desk lamp turns on so I can see what's being printed better. This is especially helpful at night when the desk lamp is the only light in the small office my printer is in. It's been set up like this for 2 years and it's been great.

This morning I was not actively printing anything and I went into the office and the desk lamp was on. I looked at the printer and it wanted to update the firmware, so I did so. Afterward the lamp stayed on. I rebooted the printer multiple times and while it's rebooting obviously the lamp is off and when it boots back up the lamp stays on.

What is causing this increased power draw? Any ideas or insights?

For now I'm leaving it fully off but I'll have to manually go in and turn it on before sending something to print which is less convenient.

you are viewing a single comment's thread
view the rest of the comments

[–] Bluewing@lemmy.world 2 points 21 hours ago

What you are thinking of is the NTC thermistor that was failing. That part was meant to limit the inrush current when the nozzle was rapidly heating. Its failure will just stop the nozzle from working at all. Which is precisely what should happen at failure. It is suspected they either got a bad batch of NTC thermistors or they were pushing the inrush current too close to the max rating. Bambu replaced a fair number of control boards and took the hit for not addressing these failures by not recalling the affected batch and replacing the offending board.

The plastic housing of the printer is a fire-retardant, high-temp polymer. And as far as I have read and know from my following of the issue, there have been no reported and verified fires caused by this particular problem. Just some scorched plastic and a bit of localized melting with the blown NTC.

But there does remain a non-zero chance of a real fire because of bad NTC. But it needs to be ignited by dust or little bits of filament that invades every nook and cranny on every printer in existence. If it bothers you and you are worried, clean your A1's insides every year. Make it a routine maintenance thing.

Disclaimer: I do own an A1 mini (which is not affected by this issue). While my mini does exactly what I originally bought it for (before the ongoing attempt of Bambu to crash the plane), I'm under no illusion that Bambu is not a company I wish to support.