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


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Posted · 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.

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    Posted · At my wits end... auto leveling just won't work suddenly.

    Hi,

    after the description of your activities, there are only a few possible points left (afaik).

    • run the diagnostics of the capacitive sensor. Run it several times to assure the sensor is working properly. If the diagnostic is inconclusive, there might be a (new?) source of electric interference, as a new lamp or so (yes, the sensor IS that sensitive).
    • Check the two wires running to the capacitive sensor. They might be damaged, mostly either directly at the connectors of the sensor board. there are a lot of topics in this forum about broken or pinced cables.
    • If the cables are ok, possibly the capacitive sensor board is faulty.

    Regards

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    Posted · 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!

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    Posted · At my wits end... auto leveling just won't work suddenly.

    Thanks for the feedback, I'm glad I could help.

    I just read a post about active leveling problems, where the culprit was a cell phone with active WIFI and Bluetooth placed besides the printer.

    Happy printing!

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