Jump to content
Ultimaker Community of 3D Printing Experts

PVA BB04 printcore; Does not extrude throughout print


nmsr1196
 Share

Recommended Posts

Posted (edited) · PVA BB04 printcore; Does not extrude throughout print

I have a new UM3 and I used PVA in the #2 BB Printcore with the default settings. I did a print that was supposed to last 3 1/2 hours. The BB printcore extruded about 2-3 mm of height, PVA and then stopped extruding the material. I tried the print again, this time increased the default temperature up 10 degrees Celsius. This time it extruded about a height of 2 mm and stopped extruding. Again, both printcores are new.  Both filaments used are Ultimaker NFC. It's the Natural PVA. I did the print with the PLA only, using PLA as the support....no issues.

Any ideas?

Edited by Guest
  • Link to post
    Share on other sites

    Posted · PVA BB04 printcore; Does not extrude throughout print

    Just to be thorough, have you tried to do a set of hot pulls and atomic pulls? I am thinking something may have gotten stuck or burned inside.

    When I first got my UM3E, it did not want to extrude until I did a cleaning. And, the BB core requires a bit more love and care than the AA core because of the nature of the PVA.

  • Link to post
    Share on other sites

    Posted · PVA BB04 printcore; Does not extrude throughout print

    I will try that tomorrow with the .4 BB.

    I swap it for a BB .8 but Cura does not switch it to BB .8 even though the UM3 recognizes it. But, I will try the .4 BB again tomorrow.

    thanks.

  • Link to post
    Share on other sites

    Posted · PVA BB04 printcore; Does not extrude throughout print

    How's the environment?

    PVA gets soft from higher temperatures and higher humidities. Use it below 28degC, and below 55%.

    If ambient humidity is higher, store the PVA in a dry place, with desiccant. When using it for long prints (>24h), craft some drybox to print from.

  • Link to post
    Share on other sites

    Posted · PVA BB04 printcore; Does not extrude throughout print

    I'm within those numbers for temperature and humidity. But, I used this as soon as I unwrapped it and that's how I got these results. So, the PVA was not laying around. After, the bed leveling and setup, I unwrapped it at that point. So, there was no time for it to develop any issue like that with such short time frame.

  • Link to post
    Share on other sites

    Posted · PVA BB04 printcore; Does not extrude throughout print

    Like I mentioned before, I would have tried my BB/AA .8 but, Cura doesn't let me select the BB/AA .8 when switched out from a .4. (That's another case I have open).

  • Link to post
    Share on other sites

    Posted · PVA BB04 printcore; Does not extrude throughout print

    hiya,

    this might be your problem.

    I had this problem and it was the hot pull that worked for me.

    https://ultimaker.com/en/community/51107-ultimaker-3-bb-core-problem-solved-here-is-how

    when you check the filament length all the way to the feeder, do you see a massive gouge where the gear has eaten into the filament?

  • Link to post
    Share on other sites

    Posted · PVA BB04 printcore; Does not extrude throughout print
    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

      • 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
        • 11 replies
    ×
    ×
    • Create New...