Yes, backups need monitoring. Preferably automated test restored, but at least monitoring of their archives.

I think the looking back fondly at… that comes from the part that we were actual, edgy teenagers back then and we enjoyed an uncontrolled space to be edgy in.

Oh great, thanks for turning on the breakfast radio in my head.

Yep. He duped Fox into paying him for a Sci-Fi comedy show and then he went and made a loving homage to Trek.

Amount of extrusion on the brim looks about right, so first thing I’d make sure is that the first layer gets laid down in a constant distance to the bed. That requires the bed to be level, but also fro the printer to know about how the bed is a bit uneven in places so it can compensate for that.

The FAQ for the printer mention:

This sounds like they did something about the autoleveling in the new firmware release. Make sure you use that, then report back.

Could you take a few pictures that document your first layer and how that problem you’re describing starts to develop?

I mean, I even had a webcam already with lighting and all - since the incident™ it now gets used before a print and not just whenever 🤷

Yes. THAT. I definitely didn’t forget to just remove the testprint last thing in the evening or first thing in the morning.

Luckily the noise. Still, the printer is in the basement, that was a quick sprint down the stairs.

Yeah, I’m starting to get into acceptable territory. See my post yesterday, that seems to be solved e.g.

Have you tried ice spray to harden the magnetic bed and peel it off bit by bit?

It was done slowly. This was a very slow crash, hence the deep melt.

Crashed the heated hotend vertically into a forgotten print during the Z-move to measure the bed position. Missed BLtouch by maybe 4mm.

Bedmesh was created right before the print and applies, I’d rate that second after underextrusion due to the bowden tube getting bent hard. We’ll see though!

Yes, definitely underextrusion. See edit for idea, test following tomorrow.

Someone else pointed out that your Bowden tube looks a little pinched in some of the corners, I can’t tell which corner is underextruding from the video but possibly there’s filament slippage from that?

Yep, it is exactly that corner where the radius of the tube reaches its minimum. I think that is a hot candidate for the main issue. Also after removing the print, it turned out the the outside had this issue as well and that was printed in the other direction. So, coming out of the slow corner the flow couldn’t accelerate quick enough to get back to volume due to high friction. Thanks, see my edit, I’ll report back!

Is there any oozing from the nozzle?

Yes, there is some. I have not calibrated retraction in Klipper yet, I know I should - however, this shouldn’t be the cause of this with almost no travel between layers or different parts in this model. But it’s on the list, you’re right.

and push resistance gets too high

Yes! That might actually be the case. We come out of the corner with a low flow rate, because, corner and low speed and the flow can’t increase quickly because of friction. Hm. I’ll reroute that Bowden tube and test again tomorrow.