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

Suddenly will say "Failed to Establish Connection with the Printer"

Recommended Posts

All of a sudden, my computer will just stop being able to connect to my printer. I get the "failed to establish connection with the printer" error.. However, when I plug in the ultimaker with my USB cable, I get the "ba-dum" sound from windows, and everything is plugged in (I can hear the fan running).

It's strange, this will actually happen while I'm testing it. For example, while I'm doing one of the alignment runs, the block temperature will start rising, and then all of a sudden just stop.

Error log:

Changing monitoring state from 'Offline' to 'Detecting serial port'

Serial port list: []

Failed to open serial port (AUTO)

Changing monitoring state from 'Detecting serial port' to 'Error: Failed to autodetect...'


Share this post

Link to post
Share on other sites

Well, much the same with me. I run a print, then if I want to run a second print, I get "Serial Timeout exception" and the machine cannot connect anymore. Unplugging the usb cable, turning off the printer, restarting CURA, nothing works except a total restart of the computer.

Pronterface works all the time though....any ideas?

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

    • 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!