Jump to content
Ultimaker Community of 3D Printing Experts
Sign in to follow this  

UM1 Nozzle congested?

Recommended Posts

Hi experts.

I'm asking for an advice.

I just updated my UM1 firmware with the one coming from the last Cura version. I don't think this is related to the problem, but I tell you to give the complete picture.

Anyway, it looks like the nozzle is in some way clogged: I'm able to push the PLA filament freely through the bowden tube, until the nozzle. Here, no matter how much I push, it looks like it is completely clogged.

I tried to increase the temperature of the nozzle, but no luck; nothing is coming out from the other side.

Do you have any suggestion to troubleshoot this? I don't know what is happened at all.




Share this post

Link to post
Share on other sites

OK, I was able to solve:

I tried to heat the nozzle at 230 degrees and then I left it for a while. Then I tried to push again the filament...a bit more and then.....SPLAT....a bunch of pla suddendly came out from the nozzle.

Ok, now it seems to be usable again. I don't know what caused this anyway.

One question for you: are the cleaning tool sold on ebay useful in these cases? I mean something like this:


Thanks for your attention.


Share this post

Link to post
Share on other sites

Some people find it useful for clearing out small bits of blackened (charred) debris.

You would do well to look for the 'nuclear' way of cleaning the nozzle - basically heating with filament, cooling and pulling the filament out to pull out all the stuff.

I always have a few spare nozzles around for the persistent clogs that need a syringe needle to clear them.

some filament is worse than others - but I put so many variants through the poor thing that I am always amased it works :)

The only other thing to do sometimes - once the filament hits the far end of the bowden it has to go into the melt end and sometimes it catches here - so I always clip my filament for loading with a 45 degree angle which seems to help it clear several of the bottlenecks.



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
Sign in to follow this  

  • 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!