[At my wits end... auto leveling just won't work suddenly.]

@Enigma_M4--

 

Thanks for the suggestion.  I ran it about 5 times.  First time it came back as not working and that there was interference.  I do happen to have two SUNLU dryboxs behind it for its filament.  So I unplugged both and ran the test again.  This time it cleared as good to go.

 

I tried it several more times before finally plugging the boxes back in and moving them a little further back from the UM3.  It just completed its active leveling.

 

Thanks!  I really didn't want to pull out and use the spare printhead I have!

[At my wits end... auto leveling just won't work suddenly.]

So, I am turning to the forums for help. I have a UM3, normally prints flawlessly-- but after a print today it decided that it no longer wanted to autolevel. This happens sometimes so I cleaned the nozzles, cleaned the bed-- tried again.  Same issue.  Okay! Off to the internet.

 

So I set my bed to 14mm.  Nope. That didn't work.

I manually level the bed. Nope. That failed as well.

I calibrate the lever switch.  Still nada.

I change PrintCores (both the AA and the BB).  Nope.

 

Okay, so let's watch what it is doing.  PrintCore 2 isn't touching the bed. Well that's odd.  Fiddle some more.  PrintCore 2 touches the bed as does PrintCore 1.  Yay its-- work... it isn't working, it kicks back and says it cannot complete the autoleveling.  Check my nozzles and bed.

 

So where I am.  I have been poking at this for 4 hours now.

 

I am running current firmware for the UM3.  I am open to anything.