Jump to content
UltiMaker Community of 3D Printing Experts

Prime Blob not always working on U3S


Recommended Posts

Posted · Prime Blob not always working on U3S

I use a U3S with Ultimaker Cura 4.11 and firmware 6.5.1 and I thought that this problem was fixed with one of the previous firmware updates but up until just recently I noticed it hasnt. My problem is when my printer finishes a print it stops extruding and raises about 3 mm away from the print and sits there (I assume the printer is waiting for the bed to cool down or the nozzle too) then just before the bed lowers and the screen asks me to confirm removal, the extruder pulls filament like an inch back from the nozzle and stops. When I go to print my next print following that the filament is so far back from the nozzle the prime blob attempts to work but the filament is so far away from the nozzle it doesn't even work and it starts printing air. The only time I have had luck with this is if I load filament, allow it to flow smoothly, confirm the filament is flowing smoothly, then print immediately after. I think this could be a bug or possibly just a fix to a setting but if anyone knows why this is happening please comment. Additionally my current workaround is to loosen the lock on the extruder and force the filament back into the nozzle by hand before each print, then the prime blob gets way too big and becomes a mess.

  • 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

    • Our picks

      • New here? Get ahead with a free onboarding course
        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...