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

Is this a problem? Extruder and bed report diff temps

Recommended Posts

After sitting overnight, when I turn the printer on, the temps reported by the printer are

extruder 41 and bed 21. The room temp is about 22.

Is the extruder reading more accurate at hotter temps or is there an issue with the temp sensor in the extruder and will this cause problems during printing?

Unfortunately, I have no way to measure the temps directly.


Share this post

Link to post
Share on other sites

This is a problem.

UM1 or UM2?

Set the nozzle temp to 105C and see if it boils water. If it does set it to 95C and make sure a drop of water does not boil.

If this test fails I'm not sure how to debug it. Typically the problem is with the wire on the top of a UM1 but you probably have a UM2? Further diagnosis is different depending on which printer you have. Do you have a multimeter?


Share this post

Link to post
Share on other sites

Usually temp issues with UM1 are resistance (almost an open) in the cable at the top of the print head. There is a 3 wire cable running from the small circuit board on the head to under the machine. The problem is usually the wire above the top of the head. At room temp (any temp really) try pushing the head around to the 4 corners and watch the temp to see if it jumps suddenly. Also try poking the wires until the temp jumps. If this happens just switch to the alternate cable (meant for a second extruder) or replace the wiring.

FYI, the voltage coming out of the circuit on top of the head should be 0V for 0C and 5V for 500C and linear in between so 20C should be around 200mv.

If this voltage is wrong (and the 5V to the chip is correct through that 3 pin cable) then the problem is with the thermocouple. But this is rare - usually the problem is with the cable on top of the head.


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

    • Ultimaker Cura | a new interface
      We're not only trying to always make Ultimaker Cura better with the usual new features and improvements we build, but we're also trying to make it more pleasant to operate. The interface was the focus for the upcoming release, from which we would already like to present you the first glance. 
        • Like
      • 114 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!