Jump to content
Ultimaker Community of 3D Printing Experts

Meaning of LED colors of rotation button

Recommended Posts


today I printed something on my Ultimaker 2. I created a gcode file using Simpolify 3D.

After around 75 percent the Ultimaker stops and then the LED of the rotation wheel turned from light blue into green. In the past I printed several objects (also created with Simplify 3D) without any problems.

- Can someone tell me what this green color means?

- Are there other colors showing up - if yes what is the meaning of the other colors?

Thanks a lot!

Edited by Guest

Share this post

Link to post
Share on other sites

I bet I know what this is.

The back of the button is a hole which is inside the printer, that allows filament to fall into the button housing and not only cause obstruction but get in the way of the leds.

Has any filament fallen in?

Push the button out using this hole from inside the machine, you'll be surprised how much is in there

Share this post

Link to post
Share on other sites

The color really turned into green.


Don't worry, there's nothing wrong with your visual perception. :)

The led ring of the encoder wheel contains multicolor (RGB) leds. Fatal errors are usually indicated by a "glowing" color-change of the encoder wheel. Most likely all came to a halt while the color was green, but before the printer was able to write the exact error message on the screen.

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.
      • 6 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!