Jump to content
Ultimaker Community of 3D Printing Experts

First Prints - Blobs Issue

Recommended Posts

Hi All, looking forward to becoming active member of community. I received my ultimaker yesterday and have been impressed by its usability.

However, I have unfortunately had a lot of issues with my initial prints. I’ve successfully completed one print but 10+ others have ended like the version attached. Essentially the nozzle gets stuck midway through the print and creates this blob type of plastic.

The successful print involved adjusting the build plate, reducing speed to 50% and increasing temp to 230 with PLA.

Why do you think I am experiencing this? I think maybe my build plate is wrong because it seems to occur because of inaccuracy in the print layers. I.e. multiple imbalances adding up over time which mean that some way through the print it ‘catches’ an existing layer and gets stuck there? Am sure this is counter intuitive and is making problem worse but I tried moving nozzle further from the build plate thinking it was ‘too close’ but this increases the inaccuracy and imbalances I guess.


I got concerned that this would clog the nozzle but did the atomic method this morning and all seems fine.

Other relevant comments are that after every failed print I have to reload the material because it looks like this:


And there is some slight grinding on the filament. Is this to be expected.


Am I good to focus on recalibrating build plate or should I be thinking about anything else to reduce this issue. I was surprised that I couldn’t find examples of others experiencing the same thing. Thanks in advance!




Share this post

Link to post
Share on other sites

The leveling procedure only gets you so far. It's time to stop doing it and just turn the screws.

What's happening is your nozzle is too far from the glass. The bottom layer is almost cold before it touches the glass and barely sticking. At some point the part comes loose from the glass and gets dragged around by the nozzle and the filament keeps coming out in a big blob.

The fix is to first make sure your glass is at 50C to 60C (no cooler, no hotter). But the main problem is that you need to loosen the 3 leveling screws by the same amount. About a full turn. Just turn all 3 counter clockwise as seen from below right now. Then start a new print and watch the initial traces being laid down. If they aren't pushed flat like a pancake then loosen by a 1/4 turn WHILE IT'S PRINTING. Turn all 3 the same amount because you probably levelled it pretty well. Although if one side is more squished or less then you could do it accordingly. If you get confused about which way to turn don't panic - take your time. You may have to restart the print but so what.

  • Like 1

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

    • Ultimaker Cura | a new interface
      We're not only trying to always make Ultimaker Cura better with the usual new features and improvements we build, but we're also trying to make it more pleasant to operate. The interface was the focus for the upcoming release, from which we would already like to present you the first glance. 
        • Like
      • 114 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!