Jump to content
Ultimaker Community of 3D Printing Experts

Extruder 1 doesn't prime in 2 material mode


Recommended Posts

Posted · Extruder 1 doesn't prime in 2 material mode

I've got an Ultimaker 3, and I've been trying to use it with PLA in extruder 1 and PVA in number 2.

However, I've found that when trying to do a print that uses both nozzles, both extruders never extrude for the first few minutes. It's almost like the device forgets to wind forward the material to compensate for the retraction at the end of the last run.It's not that the cores are clogged because both work fine when they're the only core printing. The problem only occurs when I'm set to use both cores in the same print.

I've compensated for this by manually moving the material forwards before each print, but why does this happen?

  • Link to post
    Share on other sites

    Posted · Extruder 1 doesn't prime in 2 material mode

    This is strange behaviour. Though I don't recognise the problem, updating your firmware to the latest version is always a good idea. Did you do that?

    And which slicer did you use?

    Does this always happen? Also when the previous print was ended successfully?

  • Link to post
    Share on other sites

    Posted · Extruder 1 doesn't prime in 2 material mode

    I have that issue on the Ultimaker 2+ and always do the Move Material function prior to a print to prime the print head.

    On the Ultimaker 3, I have only had this happen once, even with the latest version of the firmware. I'd re-check the firmware for the latest. One the 5 prints I have done so far on the UM3 I have here, it's only done this once. (I manually moved material on each nozzle then did the print.)

  • Link to post
    Share on other sites

    • 2 weeks later...

    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...