I've also got to switch to a different power supply for the pi that's running octoprint, and upgrade the pi to a new OS (which requires backing up and restoring existing octopi settings) because my python is EOL.

so it's working, but I'm still sighing a lot

okay I printed a CE5P calicat after attempting to fix the z-offset issue. It still is horrible.

possibly this is mostly a temperature issue: I'm using the stock temperatures but I think I upgraded this to an all-metal hotend that needs to run higher?

reprinted with higher temp. it's better, but still bad.

so probably there's another issue. I remember I did a lot of rebuilding of the hot end in the final days of using this before, so who knows what's clogged in there?

I printed on a raft because the z-offset is still fuckt

had to dig out my flir phone to take pictures for silly cellphone reasons.

Anyway, this is the 220°C 110% flow calicat. It looks way better, right?

Thanks to everyone who has given suggestions for how to fix this. Unfortunately most of them require me standing up for longer than I can manage, so I've mainly just fiddled with settings (since I can do that from my bed).

but when I can, I'll be:
* calibrating the extruder
* trying to clear clogs in the hot-end
* calibrating the z-axis offset (which is a multistep nightmare in this setup)

installed a USB power blocker to try and fix the undervolting. it didn't work.

So I'm gonna have to find another power supply for that

okay I tried switching to a different USB power supply (5v 2A) with thicker usb cables: No difference, still undervolting.

I also cold-pulled the hot end a few times, to see if that'll help.

Seems pretty good.

My z-alignment is still fucked. I printed this on a raft because I knew it still was, but the raft was nearly impossible to remove. it was WELDED to the build plate.

and keep in mind that's me saying it as someone who has made it their livelong profession and hobby of touching computers as much as they can. I love a bunch of little places to change things. I love being able to fiddle with settings.

3d printing has too many settings

fiddled with my z-offset calibration. tried measuring the build plate: that was a mistake. The thing is bent as fuck.

but it does do a 4x4 grid for level so maybe it can compensate enough for that to not be a huge problem. Lets see, time for another 9 hour print!

Okay I thought I fixed the clog and turned up the print temp and did another Calicat. At the end of the print, the webcam showed nothing there. I watched the time-lapse, and yep. No filament at all came out.

So I've got something way more broken than just a low temperature

@foone That looks like it's randomly skipping move instructions to me. If a base with that shape is breaking loose from the bed, there is no shape that would stick, in which case the heated bed is probably not hot enough.

Could test by putting the whole gcode on local storage before starting the print, to eliminate the pi undervolting from consideration.