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Ultimaker 3: Firmware v4.1.1. | Test version

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Posted (edited) · Ultimaker 3: Firmware v4.1.1. | Test version

Cura is always a popular topic of conversation and we always get a lot of feedback when sharing news, beta versions and stable versions. Everyone seems to love Cura and the work we put in there!

Less topic of discussion but equally important is the firmware we write for our Ultimaker machines. Through this post we want to update you about the latest version, what has been fixed and which new features are added.

The testing versions are always based on the latest stable, with some new added functionalities.

Before you start testing, we would like to warn you this is a testing version, so it may contain bugs. If you are working on an important or time sensitive project we recommend you continue to use the stable version.

Moving on, these are the release notes for test version TESTING v4.1.1.20171124


Known issues:

- This release is not available as installer image for new machines. This version is only available as the compressed-file variant for menu based installation over the network or on a USB stick.




  • Marlin planner underrun causes print artifacts. This was visible in parts with many short line segments and/or high speeds. An Ultimaker 3 specific problem, not in Ultimaker 2 printers.
  • Print times of 2d:23h:30m to 2d:23h:59m were displayed as 2d:0h. Also changed the time display to be the same as Cura, i.e. above 24hrs it will be shown as 1 day, where it used to start showing a number of days from 48hrs up.



Cura Connect


  • Support for the following languages: Dutch, German, Spanish, Italian, Finnish, Polish, Turkish and Simplified Chinese.
  • An icon was added to the printer title to distinguish the group host.
  • 'Move to top' didn't always work.
  • A tooltip has been addded to explain 'not available' state of a printer on the print jobs page.
  • The printer UUID and the print job UUID have been added to the print job row in the web UI to help with automated testing.
  • For larger screens (770px wide or greater) the navigation bar will stick to the top of the page when a user scrolls down.
  • When the printer details pane is opened on the printers page, the page is scrolled up to ensure that the pane is in view.




Several other tiny bug fixes and UI improvements.

Ready to start testing? The testing firmware version is available for download through the menu on your Ultimaker 3 / Ultimaker 3 Extended. Go to ‘System’ => ‘Maintenance’ => ‘update firmware’ and select ‘Testing version’. You can also use it to go back to the latest stable version at any time!

Edited by Guest
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Posted · Ultimaker 3: Firmware v4.1.1. | Test version

I am printing out a production model right now (2 more days...ugh....) but as soon as that is finished, I will be hopping on this :)

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