Jump to content
UltiMaker Community of 3D Printing Experts

UM3 BB 0.4 Core Scrapes Glass


Recommended Posts

Posted · UM3 BB 0.4 Core Scrapes Glass

Hi all,

 

I am having a problem with my UM3.


Today I replaced my short belts and the short bearing the print head.  After reassembly, I loaded my AA 0.4 print core into slot 1, and BB 0.4 print core into slot 2.

 

After printing a simple cube using PLA test from core AA, I went to print something that used the BB core with PVA.

 

After doing the prime blob, the BB print core began to "print", but it appeared to only be scraping off the glue stick off of the glass.  When the bed retracts, some PVA extrudes out.

 

I have ran active leveling, and finally manual leveling and each time I keep getting the same result for my PVA adhesion layer.

 

I have ran diagnostics on my level sensor, and UM3 is saying it is functioning ok.  I have also tried to clear the print head using PLA filament and the cleaning routine.

 

Any one have any ideas why this is happening?   What could be causing this?
 

  • Link to post
    Share on other sites

    Posted · UM3 BB 0.4 Core Scrapes Glass

    Ok Ultimaker Community.

     

    It appears I may have found a bug with UM3 5.2.8 firmware!

     

    If turn active leveling frequency less than "always", the machine appears to fail to remember the offsets, and print at the wrong z height.

     

    The moment I turn active leveling frequency back to always, it prints at the proper z offset from the glass plate.   Not on "always", the printer prints at the absolute 0 Z cordinate as the glass plate, therefore it can never extrude.

     

    Can anyone else replicate this?

  • Link to post
    Share on other sites

    Posted · UM3 BB 0.4 Core Scrapes Glass

    It worked for me too with "every week". The only setting that IS different is "Never" which now turns active leveling completely off (to be manually leveled properly).

  • Link to post
    Share on other sites

    Posted · UM3 BB 0.4 Core Scrapes Glass

    See my reply here: 

     

    - Make sure you check the print core, under those soft-white tabs ... and on the back of the heating element, make sure you don't have gunk;
    - Don't mix manual and auto;

    - "Some resistance" is a really terrible description of what you are looking for 😞

     

  • Link to post
    Share on other sites

    Posted · UM3 BB 0.4 Core Scrapes Glass

    I have this exact same problem with current firmware.  Active leveling set to always works as expected.  Leveling set to weekly (my preference) results in print cores which impact and scratch the surface while printing.  This is clearly a bug. 

    • Like 1
    Link to post
    Share on other sites

    Posted · UM3 BB 0.4 Core Scrapes Glass

    I've been noticing "random" behaviors. The other day I did something routine and it suddenly started unloading printcore 1. @gr5 told me there is an issue preventing printing the calibration chart because the printer over-retracts print core 2, but then support told me that he's wrong, the bug prevents anyone printing a calibration chart. Except, I've been able to print a calibration chart by doing nothing more than print->power cycle->print. I was able to print once and then it lost the calibration (even tho it has the settings). With active leveling set to manual, it will occasionally still do active leveling on me. There's just this long list of weird things the printer has been doing since the last firmware.

     

    I know I could downgrade, but physical, forced, firmware kludges have bricked too many devices for me in the past, and I can get about 70-80% of the prints I want with single extrusion, and I haven't seen any kind of disclaimer that if I brick my printer following the firmware recovery instructions I won't be out of warranty...

     

    @SandervG I'd rather than they put the old firmware up on the testing channel and let people choose to "up"-downgrade to it.

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
     Share

    • Our picks

      • Here it is. The new UltiMaker S7
        The UltiMaker S7 is built on the success of the UltiMaker S5 and its design decisions were heavily based on feedback from customers.
         
         
        So what’s new?
        The obvious change is the S7’s height. It now includes an integrated Air Manager. This filters the exhaust air of every print and also improves build temperature stability. To further enclose the build chamber the S7 only has one magnetically latched door.
         
        The build stack has also been completely redesigned. A PEI-coated flexible steel build plate makes a big difference to productivity. Not only do you not need tools to pop a printed part off. But we also don’t recommend using or adhesion structures for UltiMaker materials (except PC, because...it’s PC). Along with that, 4 pins and 25 magnets make it easy to replace the flex plate perfectly – even with one hand.
         
        The re-engineered print head has an inductive sensor which reduces noise when probing the build plate. This effectively makes it much harder to not achieve a perfect first layer, improving overall print success. We also reversed the front fan direction (fewer plastic hairs, less maintenance), made the print core door magnets stronger, and add a sensor that helps avoid flooding.
         

         
        The UltiMaker S7 also includes quality of life improvements:
        Reliable bed tilt compensation (no more thumbscrews) 2.4 and 5 GHz Wi-Fi A 1080p camera (mounted higher for a better view) Compatibility with 280+ Marketplace materials Compatibility with S5 project files (no reslicing needed) And a whole lot more  
        Curious to see the S7 in action?
        We’re hosting a free tech demo on February 7.
        It will be live and you can ask any questions to our CTO, Miguel Calvo.
        Register here for the Webinar
          • Like
        • 10 replies
      • UltiMaker Cura 5.3.0-Alpha 🎄 Tree Support Spotlight 🎄
        Are you a fan of tree support, but dislike the removal process and the amount of filament it uses? Then we would like to invite you to try this special release of UltiMaker Cura. Brought to you by our special community contributor @thomasrahm
         
        We generated a special version of Cura 5.2 called 5.3.0 Alpha + Xmas. The only changes we introduced compared to UltiMaker Cura 5.2.1 are those which are needed for the new supports. So keep in mind, this is not a sneak peek for Cura 5.3 (there are some really cool new features coming up) but a spotlight release highlighting this new version of tree supports.  
          • Like
        • 16 replies
      • New here? Get ahead with a free onboarding course
        Hi,
         
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 14 replies
    ×
    ×
    • Create New...