Jump to content
Ultimaker Community of 3D Printing Experts

Rims appearing every 5 layers on fine prints?


Recommended Posts

Posted (edited) · Rims appearing every 5 layers on fine prints?

I don't own an Ultimaker, but several CEL Roboxes. The printer is really excellent, easy-to-use, very versatile with interchangeable tool heads (dual material just released, drag knife under development, laser engraver and paste extruder on the horizon) and quite affordable.

The custom-built AutoMaker software relies on Cura for slicing, which is why I'm posting my question in this forum:

I've spotted not only on mine, also on other people’s Roboxes on very fine prints (20 micron layers) the phenomenon of tiny rims, vertically reoccuring approx. every 5 layers. The precision with which the rims reoccur makes me believe that it is not a mechanically-indicated issue, but an issue caused in software, perhaps something like a numerical rounding error.

Has anyone of you folks ever seen these rims on any fine Ultramaker prints? If so, could you post images?

dualmaterialprint_spiral_cone.jpg

26140774746_36c89ffcb0_z.jpg

26140772296_eb317733aa_z.jpg

Edited by Guest
  • Link to post
    Share on other sites
    Posted · Rims appearing every 5 layers on fine prints?

    It looks like a Z axis issue. The Z axis moves a smaller distance than it should every 5 layers. I'm wondering if you are close the resolution of the Z and you lose a step every 5 layers. Stepper drivers are very complicated and with microstepping it is very common for some microsteps to do nothing (not advance the motor) for complicated reasons that I don't fully understand such that it is not quite linear movement (but close enough for most things).

    Alternatively is that Z distance where the pattern repeats an identical distance to one full rotation of Z screw? It seems unlikely but worth checking.

  • 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
        Visit our virtual showroom and learn more about the Ultimaker ecosystem!
        • 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...