Jump to content
Ultimaker Community of 3D Printing Experts

Missing printing layers

Recommended Posts

I've been trying to print models using my Ultimaker 2+, and the printed models always miss one or two layers, leaving a very big gap on the sample.

I wonder what could be the reason, and how to troubleshoot it. Thank you.





Edited by Guest

Share this post

Link to post
Share on other sites

Unfortunately lots of things can cause this.  First make sure that cura doesn't also show a missing layer - often this kind of thing is caused by a tiny hole in the model (a bad model).

It could be a filament tangle.  But the two parts in the top photo seem to have the problem at the same height.  Do you agree?  If so then it's a "Z" issue:

When the Z axis moves, if it doesn't move far enough, it will overextrude on that layer.  If it moves too far then you get a gap.  

with power off you could try moving the bed up and down to see if you feel anything.  Usually the problem is fixed by cleaning the Z axis screw but it could be many things (stepper driver too hot, screw, nut, vertical rods, vertical bearings).

Putting a 1kg weight such as a brick in the back of the bed once it starts printing can sometimes fix these issues or move them elsewhere.

The helix is triple so if you use a toothpick and clean while spinning the screw you will miss the other 2 helixes.

I recommend spending at least 2 minutes with a toothpick and tissue.  You can certainly afford 2 minutes as a test, right?  concentrate near the top of the screw where you are having problems (you only seem to be using the top 6cm so why clean the whole thing?).  A proper cleaning involves removing the stepper and Z screw - very easy to do - the hardest part is unplugging the cable (assuming um2) (you have to remove a cover - no big deal).  Then place on newspaper and spray with WD-40 and clean it completely and let dry and put ONE tiny drop of grease on it after.

While the screw is out test the bed movement and see if there might be a problem with rods and/or bearings.

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

    • How to 3D print with reinforced engineering materials
      Ultimaker is hosting a webinar where we explain how you can achieve and maintain a high print success rate using these new reinforced engineering materials. Learn from Ultimaker's Product Manager of Materials and top chemical engineer Bart van As how you can take your 3D printing to that next level.
      • 2 replies
    • "Back To The Future" using Generative Design & Investment Casting
      Designing for light-weight parts is becoming more important, and I’m a firm believer in the need to produce lighter weight, less over-engineered parts for the future. This is for sustainability reasons because we need to be using less raw materials and, in things like transportation, it impacts the energy usage of the product during it’s service life.
        • Like
      • 12 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!