Jump to content
Ultimaker Community of 3D Printing Experts

Crashing Ultimaker 3 extended - possible power issue

Recommended Posts

Hi All

I am sorry if this appears elsewhere but I haven't been able to find any relevant threads.

Whilst starting a print, the print initiates but then whilst heating (generally the at the start of heating the Printcores) the printer crashes. The screen and lights flicker then the printer turns off and then on again.

I have changed the printcores, changed the materials, ran load/unloading and heated the bed all separately to see if it was an individual issue, but all run smoothly. It only crashes when running a print (it crashed once while running a calibration print). I generally run prints from USB, I have checked using two different drives and running from CURA through a LAN, all with the same issue.

I am fairly experienced with 3d printing, running prints daily and having built custom machines in the passed but this one has me stumped. I have updated to the latest version of CURA to check software, and have also factory rest the machine. I am thinking it may be a power issue but would have expected this to show up on the seperate checks (changing material etc).

Any help or advice would be very much appreciated


Share this post

Link to post
Share on other sites

This is 90% chance of being the power brick. Those things are not as reliable as one would expect. Some work great. Some don't. I would contact your reseller and insist they give you a new one to try (much cheaper than shipping your whole printer back I assume).

You can also just buy one. They are a bit pricey but that may be your fastest solution to a working printer if time is worth more than money.

Um used to ship with this power supply:


And around when the UM3 came out they started shipping this one:


The one without the "T" seems so much more reliable. Both are the same wattage. The same amperage. The same voltage. The same power. But the "T" version seems to shut down more often under full load (bed heating and at least one core heating). I relegated my "T" supply to my um2go which doesn't need as much power.

Some of the non "T" supplies also have intermittent issues but not as bad as the "T" ones as far as I can tell from user reports on the forum and elsewhere.

  • 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

    • 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!