Jump to content
Ultimaker Community of 3D Printing Experts

Missing sections of a print in Preview


Recommended Posts

Posted · Missing sections of a print in Preview

I have an odd issue where random sections are missing in the preview whenever I scale my object. 

Original size is 320mm

I scale down to 210 huge 10-12mm sections are missing,

I scale it down to 150mm 5 mm sections are missing but different areas than the first.

I scale it to Under 100mm everything is fine

Using version 4.8. I appreciate this a complicated item but this is really odd. 

I have not actually tried printing it, I am assuming the preview is accurate. 

Thanks

 

  • Link to post
    Share on other sites
    Posted · Missing sections of a print in Preview

    If possible post the STL and also use "File | Save Project" and post the 3mf file as well.  It will contain your settings.

    Some models just don't scale well and you are pushing it down a long ways.  Features can disappear because Cura knows the printer can't print them with the current settings.  Why it says it can print at 100mm but not at 210 is odd though.

  • Link to post
    Share on other sites
    Posted · Missing sections of a print in Preview

    Yes it is really confusing me considering the empty areas move around depending on scale ratios.  Even tried different exports of the same project, stl,obj, etc...

  • Link to post
    Share on other sites
    Posted (edited) · Missing sections of a print in Preview

    When you open a model in Cura and the popup says "The model is not watertight" it means the model itself has errors.  In your case, a lot of errors.  When a surface is red in X-ray view it is facing the wrong way and Cura can't figure it out.

     

    Here are two models.  On the right is the one you uploaded and on the left is the same model repaired at NetFabb (where you have to create a free account).  Just upload a model and download it when it's been processed.

    gun1.thumb.png.1f680d57f09852be65ff370c12cb6452.png

     

    Here they are sliced.  Missing pieces in the right model.  The repaired model looks pretty good.  Notice how the missing pieces in the right model coincide nicely with the red areas in the Xray view.

    BTW I think this needs to be printed on a fair sized raft.  Its so tall and has very little contact with the build plate.  Trying to print this fast could cause the model to fall over of it's own accord.  I'd have accel control enabled at about 250 as well.  Nice soft starts and stops are the way to go.

    gun2.thumb.png.37201cc89187033ee0f685b9b300e305.png

    Edited by GregValiant
    • Thanks 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

      • Startups, apply for the Forward AM Innovation Award!
        Are you a startup using 3D printing? Perhaps you should continue reading... 
         
        Together with BASF we are launching the Forward AM Innovation Award - the very first global contest for startups developing new applications with 3D printing!
         
        Why apply?
        The winning startup will receive €100,000 in goods and services*, along with coaching and marketing exposure from top-notch leaders in the industry.
         

         
        Who can apply?
        Your startup creates products using Additive Manufacturing, is less than 5 years old, and has less than 50 employees. We are looking for 3D printing applications with a strong focus on innovation, sustainability and scalability.
         
        Dental aligners, shoes, tools, automotive parts, music instruments, industrial tooling and molding, medical implants, sports equipment, toys, architecture, fashion, construction... all are welcome to join!
         
        Do you have an innovative, sustainable and scalable idea that leverages the unique possibilities of 3D printing? Then it is time to apply!
        More information can be found here.
         
        Applications close on March 28th, 2021
        * What does "in goods and services" mean?
        The winner will be able to pick any item from the overall product and service portfolio of the sponsors, e.g. printers, materials, consulting, software... Choose whatever you need to accelerate your startup.
         
          • Like
        • 0 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...