Jump to content
Ultimaker Community of 3D Printing Experts

Ultimaker 2+ making weird bumps during print

Recommended Posts

Originally the issue started out small, just a weird noise like something was rolling over a bump making a thump sound each time. It only occurred when the print head was on the right side of the printer, anywhere past the center. It has progressively gotten worse, now to the point where it's starting to slightly deform prints and it doesn't seem to be in a consistent spot. It can happen for like 5 to 10 layers, then never happen the rest of the print.

I've checked belt tension and everything there seems okay. I'm worried that it could be wear on the belts, it is 3 years old as this was originally a UM2 and I've done the upgrade kit.

Also a note, not sure if it's related but I want to lay it all out there. When I calibrate, the step where you use the piece of paper, I either get a near full stop, where the head is pressing firmly against the glass plate or it's too loose and the paper can easily slide in and out without any friction from the head. This started after the UM2+ upgrade was added.

Edit: I was messing with the calibration and instead of measuring it as close to the 1mm that is recommended on the first step, I went just a notch above. Then during the fine tune part of the calibration, I was able to get a more concise calibration, with somewhere in the middle of what I was getting. This seems to have stopped the noise as I've been printing for the last 4 hours and not heard it.

Edited by Guest

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.
      • 6 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!