Jump to content

Recommended Posts

Posted · Heated bed reporting 0 degrees, no errors, won't heat

I really hope this isn't simple as I did my best searching and came up with nothing other than the usual heatbed P100/ solder connector issues.

 

So here goes (actually I hope it IS simple)

 

I needed a new motherboard so I bought one from Aliexpress and updated it with the latest firmware. It looks pretty convincing if it is just a knockoff? I was hoping it was from the same production line...  

 

The motherboard "temp3" input pins are showing 109 ohms, the same as the sensor being unplugged, which is spot on for the temperature in the room. 

 

When I go to "set buildplate temp" it reports 0/0 and it never climbs when I set it higher (e.g. 0/60), and the build plate is not heating.

 

When I go to print, it sits there preparing the print waiting for a buildplate to heat up that has no intention of heating up, and remains at 0 degrees. 

 

So what could cause the motherboard to have the correct input resistance, but report 0 degrees? An outright broken board or something salvageable? 

 

Thanks for any insight 

 

 

IMG_20190823_173059384_HDR.jpg

  • Link to post
    Share on other sites

    Posted · Heated bed reporting 0 degrees, no errors, won't heat

    It got weirder!

     

    So I plugged in a spare nozzle temp sensor into temp3 and it then read a temp correctly and all was good, it would even heat up ok.

     

    But if the sensor was unplugged an error was flagged right away. So it must be something to do with the sensor, even though I can read the correct resistance from it. Maybe the machine reads the resistance in a different way than my multimeter? 

  • Link to post
    Share on other sites

    Posted · Heated bed reporting 0 degrees, no errors, won't heat

    I fixed it! 

     

    I tried measuring voltage across the sensor and found that it was 1.3V when the nozzle was in the mV. So I disconnected the power to my (also NEW) heated bed, and the temp worked fine!

     

    So I then saw lots of surface solder splatter around the connector on the bed which was shorting the two middle pins. After cleaning that off, it worked.

     

    So the sensor had been confused by the short, but not enough to throw any errors. 

    IMG_20190823_213320606.jpg

    • Like 1
    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

      • Help Us Improve Cura – Join the Ultimaker Research Program
        🚀 Help Shape the Future of Cura and Digital Factory – Join Our Power User Research Program!
        We’re looking for active users of Cura and Digital Factory — across professional and educational use cases — to help us improve the next generation of our tools.
        Our Power User Research Program kicks off with a quick 15-minute interview to learn about your setup and workflows. If selected, you’ll be invited into a small group of users who get early access to features and help us shape the future of 3D printing software.

        🧪 What to Expect:
        A short 15-minute kickoff interview to help us get to know you If selected, bi-monthly research sessions (15–30 minutes) where we’ll test features, review workflows, or gather feedback Occasional invites to try out early prototypes or vote on upcoming improvements
        🎁 What You’ll Get:
         
        Selected participants receive a free 1-year Studio or Classroom license Early access to new features and tools A direct voice in what we build next
        👉 Interested? Please fill out this quick form
        Your feedback helps us make Cura Cloud more powerful, more intuitive, and more aligned with how you actually print and manage your workflow.
        Thanks for being part of the community,

        — The Ultimaker Software Team
        • 0 replies
      • Cura 5.10 stable released!
        The full stable release of Cura 5.10 has arrived, and it brings support for the new Ultimaker S8, as well as new materials and profiles for previously supported UltiMaker printers. Additionally, you can now control your models in Cura using a 3D SpaceMouse and more!
          • Like
        • 18 replies
    ×
    ×
    • Create New...