Jump to content
Ultimaker Community of 3D Printing Experts

Bug with the 2nd PrintCore switch hook?


Recommended Posts

Posted · Bug with the 2nd PrintCore switch hook?

Hi,

Yesterday I tried to pack the build plate full to increase the build time efficiency and nearly got a heart attack after the first layer when the print head stuck on the little hook on the right hand side which is used to move the 2nd print core down.

It seems like the back right corner of the build plate is not fully usable due to this design - despite in my opinion its very neat ;) Loosing a little bit of space is not so much an issue for me, but shouldn't the UM3 (Extended) firmware prevent the head from moving along this hook when its not going to switch the print core? As a software developer I would call this a bug. Will this be fixed, or is it a "feature"?

Best regards,

Alexander

  • Link to post
    Share on other sites
    Posted · Bug with the 2nd PrintCore switch hook?

    IMG_0703.thumb.jpg.221b7f88131e6e6742b796ac879f1e88.jpg

    I rearranged my build so it fits and doesn't collide with the hook. You see the arm in the front, if I rotate it so that the long part is in the back and the "pointy" part in the front - same position - the print core switch collides unstopped by the system with the hook in the back right. Similar problem when I add to this model a 5 layer skirt with 1mm distance to the model the head will scrubb (far less violently than colliding with the hook) against the right rail. So the right 1,5-2cm (and around 3-5cm in the back) of the build plate is essentially dead. On the left side there is absolutely no problem.

    Don't understand me wrong, in my opinion this is absolutely okay due to the print head design (which is still really smart and reduces the need of an actuator to retract the second core). But the firmware should cap the coordinates in order to prevent such bad crashes regardless what the gcode tells the machine to do. It would be a really simple fix (when relying on a calibrated X/Y axis, which we should be allowed to).

    IMG_0703.thumb.jpg.221b7f88131e6e6742b796ac879f1e88.jpg

  • Link to post
    Share on other sites
    Posted · Bug with the 2nd PrintCore switch hook?

    This feature is built into Cura. I believe from another post that you use another slicer, right? Maybe you can build this "forbidden zone" into your slicer.

    But of course I recommend to switch to Cura. Do you print with PVA as well? Cura contains smart features with nozzle temperature control which is essential for PVA reliability.

  • Link to post
    Share on other sites
    Posted · Bug with the 2nd PrintCore switch hook?

    This feature is built into Cura. I believe from another post that you use another slicer, right? Maybe you can build this "forbidden zone" into your slicer.

    But of course I recommend to switch to Cura. Do you print with PVA as well? Cura contains smart features with nozzle temperature control which is essential for PVA reliability.

     

    I've used Cura as well and I see the dead zone there. Most of the time I use Simplify3D and yes, I could specify a dead zone in the software. But in my opinion from a software developer view this should not be a software issue, but a firmware issue. Firmware should always prevent hardware damages caused by external interfaces (in this case the gcode) which should be always treated untrustworthy - even for the own tools.

  • 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 Transformation Summit

        On April 20 - April 23 we will host the Ultimaker Transformation Summit. Come talk to us via Live chat and get inspired by any of our relevant presentations!
        • 14 replies
      • New here? Register your Ultimaker for free 3D printer 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
        • 0 replies
    ×
    ×
    • Create New...