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

Ultimaker isn't working, thermocouple defect?

Recommended Posts

I've assembled the Ultimaker, and connected it to the Mac. Strangely, the Mac won't boot if the USB cable is connected to the Ultimaker, even is the Ultimaker is switched off. The Mac runs OSX 10.6.8 and Cura 12.11 (12.12 crashes under 10.6). I've used the wizard, updated the firmware (that even works when the power to the Ultimaker is off, is the Arduino powered by USB?). In the next step I test the hardware, the communications work, and the heater also (though maybe not always, but sometimes I feel the printhead heating up). But Cura can't see the temperature rise, it stops with an error. I've checked the thermocouple, it is connected correctly, its wires are not broken (I measure a resistance of about 3 Ohm when not connected to the block). I've exchanged the wires, using the wires for the second thermocouple, all no go.

Share this post


Link to post
Share on other sites
I've figured this out myself, the wires of the thermocouple need to be connected the other way around, the red one must be connected to the left terminal on top of the printhead, not the right.

Yes, this has been an error in one of our latest batches of thermocouples. There have been a small amount of thermocouples which are wired the wrong way around. (Red/yellow swapped) they work fine, but only the wire colors are wrong.

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

    • Introducing Ultimaker Cura 3.6 | Beta
      Ultimaker Cura 3.6 | Beta is available. It comes with new features, bug fixes, and UX improvements. We would really like to have your feedback on it to make our stable release as good as it can be. As always, you can download the beta for free from our website, for Windows, MacOS, and Linux.
        • Like
      • 88 replies
    • Print Core CC | Red for Ruby
      Q: For some users, abrasive materials may be a new subject matter. Can you explain what it is that makes a material abrasive when you are not sure which print core to use?
      A: Materials which are hard in a solid piece (like metals, ceramics and carbon fibers) will generally also wear down the nozzle. In general one should assume...
        • Like
      • 30 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!