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

Movement of extruder motor (even without filament) causes temp reading to artificially dip and overshoot

Recommended Posts

This is a very strange thing. I've been haunted by this issue by an original Ultimaker and an Ultimaker I built myself. I've had some intermittent temperature stability problems. In diagnosing this issue, I have discovered that when the extruder motor (and possibly other motors) is driven even without filament, the temp reading drops ~5C immediately. The temp controller compensates for this artificially low temp and pumps up the power. The instant the extruder motor stops driving, the temp snaps back up ~5C but by then it has overshot. This has happened on multiple Ultimakers with different hardware. I originally diagnosed it as a blown up stepper motor but now I'm not so sure.


Share this post

Link to post
Share on other sites

Indeed interesting. Sounds like cross talk or (partial) short cut somewhere. Maybe you can check / answer a few things:

- Do you use an original UM shield PCB or a legacy board?

- Are the wires of the motor nicely twisted?

- Do the motor wires run in parallel with the sensor wires?

- Does the effect exist for any motor, i.e. also for x, y and z axis?


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
      • 92 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!