Jump to content
Cura Connect | Survey Read more... ×
Ultimaker Community of 3D Printing Experts

Broken AA Core tab

Recommended Posts

Hey everyone!

My institution recently purchased a UM3 and a scanner on grant money for an upcoming project. I've been 3D printing at home for a couple of years now (prusa i3), and since we're a pretty small college, I've been tasked with a lot of setup/answering questions: something I don't mind at all.

Yesterday I had a print fail (I'm thinking retraction settings, but that's neither here nor there). I was going to pull the AA core out to check for clogs, and to change out the filament. I ran the core swap process (an absolute dream coming from reprap land), the head moved to its spot and I took it out: easy peasy. But when it came time to put it back in, the clear tab at the top (polycarbonate?) snapped, right at the two thinnest spots.

I did nothing different and applied the same pressure when I was setting up the printer and removing said core: has this happened to anyone else? I know UM hasn't released the schematics yet, but has anyone printed replacement parts (yet)?

Thanks for y'alls input. So far this has been a super great machine to work with (and I've been using Cura as my own slicer for years, well done!)

Share this post

Link to post
Share on other sites

Hi and welcome!

Nice you enjoy this machine. About the core plaatic broken, I don't see anything wrong here on your side, you should be able to get a replacement from your UM reseller.

Unless someone sees it otherwise?

Share this post

Link to post
Share on other sites

Hi, gardnert, that definitely doesn't look good. Since you're in the US, reach out to our team at Support@fbrc8.com.


Thanks! Our original vendor pointed us to you, small world! The return/replacement process is already underway. Thanks for the heads up!

  • Like 1

Share this post

Link to post
Share on other sites

Mine broke around the screw, the local dealer 'Creative tools' here in Halmstad Sweden say they don't have it as spare part, just the hole print core.


that is correct, you'd replace the whole printcore. replacing this 1 part is a total pain and it's better to just replace the core.

Share this post

Link to post
Share on other sites


You can print a new one!

The file is on GitHub


file is: 2129-F

STEP to transform into STL or you can download from below!

Original Tab is Polycarbonate (PC). Print it in CPE or in CPE+ and it won't stress crack anymore and it will be almost transparent.

PC  stress-cracks under stress when in contact with oil...





2129-F (repaired).stl

Edited by ludo06

Share this post

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

    • Architect Design Contest | People
      The goal of this contest is to design a set of people figurines that could be used in such a project to make an area, office or mall seem populated. 
      Think of different types of people in different environments, like walking people, people standing still, working people, and both men and women.
      • 9 replies
    • Taking Advantage of DfAM
      This is a statement that’s often made about AM/3DP. I'll focus on the way DfAM can take advantage of some of the unique capabilities that AM and 3DP have to offer. I personally think that the use of AM/3DP for light-weighting is one of it’s most exciting possibilities and one that could play a key part in the sustainability of design and manufacturing in the future.
        • Like
      • 3 replies

Important Information

Welcome to the Ultimaker Community of 3D printing experts. Visit the following links to read more about our Terms of Use or our Privacy Policy. Thank you!