Jump to content

Core 2 down while only printing with Core 1


Recommended Posts

Posted · Core 2 down while only printing with Core 1

Hi !


Strange problem: I'm printing several large pieces without any support, using only printcore 1 in Blue Ultimaker CPE, but the UM3 sometimes begins the print by lowering core 2, which ruins the print...


Q1: why ?

Q2: can it damaged itself in the process ?

Q3: I now flick the lever by hand when I see this happening... Am I allowed to do that ? Does it confuse the printer ?


Any help appreciated :)

  • Link to post
    Share on other sites

    Posted · Core 2 down while only printing with Core 1

    It may be that it's trying to do the skirt with both materials. Are you printing with a skirt? If you turn off the skirt, does it still try to start with Print Core 2?

    Or is this happening during the leveling process? It should active level both Cores.


    The printer should know which Core is down at any point in time by homing and going to the switching bay before any activities where it matters which Core is in the "active" position. 


    To be safe, you might want to go ahead and calibrate the lifting switch: 


  • Link to post
    Share on other sites

    Posted · Core 2 down while only printing with Core 1

    Thanks for the reply.


    I calibrated the lever too be on the safe side, and am now printing with a skirt and core2 in the correct position for now...


    I will keep you informed if the problem happens again :)


    But why in hell would it try to print the skirt with both materials as you suggested ???

  • Link to post
    Share on other sites

    Posted · Core 2 down while only printing with Core 1

    If you are using both extruders it may be doing a priming line around the skirt to make sure the nozzle is really ready to print. I print with a lot of brims and whatever the brim extruder is, the other extruder always outlines it to get the material really flowing.

  • Link to post
    Share on other sites

    Posted · Core 2 down while only printing with Core 1

    Could you include a vide of what's going on? The printer should home and then go to the switching bay to make sure it's got the correct one down.

  • Link to post
    Share on other sites

    Posted (edited) · Core 2 down while only printing with Core 1
    9 hours ago, PeeWee3D said:

    It just did it again while printing the calibration XY test ! :(

    This would happen to me periodically until I made a change. Now, I do not remember the change since I have been recycling working project files. I know that is not much help to you, but if you post a project file, someone or myself can look at it to see why it is trying to use the second core even though you may not be using it.


    But, on the X,Y calibration, it will outline both materials as a priming function since it is going to use both cores to calibrate each other with. Or, I may be misunderstanding (Highly possible) and as @fbrc8-erin suggests, a vid would be helpful. But at all times, when using both cores for anything, it will do an outline for the secondary nozzle.


    Secondary nozzle would be if you use a PVA brim, that goes down first along with the support layer foundation. Core 1 becomes the secondary nozzle as it is not the first used. And, it will outline everything it needs to so that it ensures proper priming. At least that is what I have extrapolated.


    But if printing with just core 1, I used to get core 2 doing some sort of blob and initial priming. I just cannot remember what I did to alleviate that.

    Edited by kmanstudios
    • Like 1
    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

      • UltiMaker Cura 5.7 stable released
        Cura 5.7 is here and it brings a handy new workflow improvement when using Thingiverse and Cura together, as well as additional capabilities for Method series printers, and a powerful way of sharing print settings using new printer-agnostic project files! Read on to find out about all of these improvements and more. 
          • Like
        • 7 replies
      • S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
        (Sorry, was out of office when this released)

        This update is for...
        All UltiMaker S series  
        New features
        Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
          • Like
        • 0 replies
    • Create New...