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Looking for help with failed prints on Ender 3 Pro

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    Looking for help with failed prints on Ender 3 Pro

    Looking for advice and help please. Here’s the story.
    I bought a new Ender 3 Pro about 3 months ago. My first printer.
    I added a glass bed plate and Capricorn tubing. I use CURA for slicing.
    Accepted defaults for everything. I use only PLA filament.
    Temps at 60 and 200.
    I control the printer from a Raspberry Pi and Octoprint.
    I started 3D printing. Everything went fine for many weeks. Lots of output.
    Then last week a print went amok, and I got a tangled mess of filament (Mess.jpg)
    I cleaned up the mess and tried again. It failed again early on in the print.
    I tried simpler prints and they too failed. See images Mess2 and Mess3 for early problems
    And Mess4 for start of trouble and print cancelled.
    I then dismantled the hot end and replaced the brass extruder head.
    I also cleaned out the filament path and replaced the tube and connectors.
    I triple checked that the bed was level. I cleaned the glass with alcohol.
    Prints are still failing and I attach some examples.
    Do the images suggest what might be at fault or what I am doing wrong?
    Especially the closeup in Mess2 (wide angle is Mess3 with white arrow)
    Any hints or suggestions really appreciated.
    PLAx3

    #2
    Can you try slicing in Cura and using that instead of Octoprint as a test?
    Also have you tried using a glue stick or something for better adhesion?

    Comment


      #3
      Johann, thank you for your interest.
      I do always use CURA for slicing and only use Octaprint for transfer of the gcode to the printer.
      I understood that a heated glass bed provided the optimum adhesion solution.
      I clean the bed with alcohol.
      My main issue is that the printer was working fine for several months.
      I had thought that maybe the PLA had gone off. It is stored in its original bags with silica.
      I am advised that PLA doesn't really go bad over such periods.
      My hope was that the image mess2x.jpg (attached again) would suggest a cause to a trained eye.
      Just to be sure, as a test, I will slice on my PC with CURA and transfer to the printer via memory card.
      I do recall several updates to Octaprint modules over recent weeks. Perhaps that has introduced bugs. Just maybe!
      PLAx3

      Comment


        #4
        It could be that adhesion isn't good in that spot and when it prints, it is separating. Try re-leveling your print bed.

        Comment


          #5
          Progress I think/hope.
          I observe that the cooling fan for the hot end is NOT running when I start a print.
          It should always be running during a print.
          Is that correct???
          The other fan (block cooler) is running - both are mounted sidexside on the carriage on the Ender 3 Pro.
          PLAx3

          Comment


            #6
            Yes it should be on during a print. It can confirm if its possible to include a photo with like an arrow to which fan you're talking about.

            Comment


              #7
              Image attached. It's the one that blows the air directly on the hot end. Marked X
              I reckon that would cause trouble printing without it?
              PLAx3

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