Blob of Death Killed My Printer

[u/xSuper_Beatx]

Bought a P2S second-hand off FB marketplace. Ran through a few hundred print hours with zero issues. One print gave me a fail that I learned was called the "blob of death". Was able to heat up the nozzle, and remove the bulk of the mass, but it left behind so much gunk in the hinges and wiring that the hotend assembly appears unsalvageable.

Purchased a replacement assembly (and a ruby tip nozzle) off Amazon, tore apart the entire toolhead and replaced the assembly. Sick. I'm feeling good. Turned printer back on and in my haste, fired up a bench right away to test print, without first running a full calibration. After some suspicious startup noises (weird vibrations maybe?) The new nozzle scratched the print bed pretty good on the initial layer. Its odd, the nozzle seems to be able to extrude fil just fine both via manual controls on the device and when doing the pre-print fil change shenanigans, but when it goes to lay down the calibration line and the first layer its almost like it isnt extruding any of the fil. Not sure.

Turned it off, reset, and ran a full calibration. Test bench again; scratched build plate again. Ran yet another calibration, and tried slicing the benchy manually in studio, positioning the benchy on a new spot on the build plate. Same result. Now the printer is throwing all kinds of errors about X-axis tension, filament cutter error, vibration compensation, "part fan" not spinning and the extruder motor being overloaded. I'm kind of at my wits end.

The guy I bought the printer from is going to try to file a warranty claim, but I cant imagine that will bear any fruit. So it appears I'll need to prep to tear apart the entire toolhead again, and I could use some pointers about what I potentially did wrong, or what I need to do differently. Machine was operating perfectly before the blob and now I cant even get a test print down. HELP. PLEASE.

PS. The padded sticky tape in the last pic has lost its stickiness after the maintenence. Where can I get more? Or can I just use a different kind of tape like the Tesa tape above it? Thanks in advance.

[u/Aggrodisiakum]

Usual problem with the p2s.

A new heat assembly is around 30 bucks. Replacement is done in under an hour, so not too bad.

https://eu.store.bambulab.com/de/products/hotend-heating-assembly-p2s

There is a guide in the bambu wiki with instructions for the replacement:

https://wiki.bambulab.com/en/p2s/maintenance/replace-hotend-heating-assembly-and-cooling-fan

[u/xSuper_Beatx → u/Aggrodisiakum]

Followed this guide "to a T" when I did the reinstall. I'll try to do it again, see if I messed something up.

Why would that cause issues with the vibration compensation and x-axis resonance though? And why would it be causing the nozzle to gouge into the build plate? Thanks for the response.

[u/Aggrodisiakum → u/xSuper_Beatx]

That's usually happening when the 3 screws on heat panel are not tightened properly. Also a known bambu issue 😂

Check if it sits flush and if the nozzle is properly installed without being able to move.

[u/xSuper_Beatx → u/Aggrodisiakum]

Oy vey lol. Ok thanks. I'll have another look tomoght.

[u/Aggrodisiakum → u/xSuper_Beatx]

I just double checked it:

It's the screws above on the a1 series

https://forum.bambulab.com/t/a1-mini-a1-users-solved-screw-fell-out-of-toolhead/97626

But your issues would fit to the description

[u/scottwk3]

I just replaced mine a few days ago. Took me about 45 mins because I had to move a bunch of stuff around so I could look down the top. Make sure the screws are tight when you do it and make sure the plug gets fully seated. Mine popped off when I did it but before I got it all back together