Jump to content
Ultimaker Community of 3D Printing Experts

(Idea/Question) Pt100 sensor on UMO

Recommended Posts


I am printing at around 215-220° (0.1mm/50mm/s).

I think this is the perfect temperature on my machine but i am a bit confused since normally 210°C should be enough for PLA. Therefore I did some resarch about the thermocouple and the installed sensor.

It is an K-type thermocouple and an AD597.

According to the Datasheet and Wikipedia I found the following error ranges:

AD597 (without calibration):

maximum error at ambient temp. of 60°C: +-4°C

stability: 0.05°C/°C

That means that you have a maximum error of 30*(+-0,05°C) + (+-4°C) = +-5,5°C at 30°C

if I am right.

Thermocouple type k:

class 1 at 210°C: max{0,004  * |t| = 0.84, 1.5°C} = 1,5°

class 2 at 210°C: max{0,0075 * |t| = 1.575, 2.5°C} = 2.5°C

Let's say it is an class 1 thermocouple, then we have a maximum error of +-7°C, right?

Maybe I am missing some details (like a calibration or something)?!

But if I am right, than it is quite a lot and maybe that's one of the reasons why Ultimaker changed to Pt100 sensors...

Is there maybe already a solution for Pt100 sensors at the UMO, or is there any other reason why this will not work?

Edited by Guest

Share this post

Link to post
Share on other sites

You could buy a umo 2.1.1 chinese version (99€) and reuse almost everything (except you would need the pt100). Even the heater works. But this kind of upgrade would work better if you have the umo bed upgrade kit because the power supply it's the same of umo+/um2. Ofc the original board from ultimaker cost 250€+ and it's much more reliable. I got an umo (not plus) box and to adapt it to the 2.1.1 board it's just as easy as making a few holes and cutting a bit the wood frame (not cute but works). If anyone goes this route on chinese board check that they put the power button and that they have the give you the safety pins. Mine didn't and it was a mess (also the connectors for pt100 and fan/led where upside down...). But they are cheapo

Edited by Guest

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

  • Our picks

    • How to 3D print with reinforced engineering materials
      Ultimaker is hosting a webinar where we explain how you can achieve and maintain a high print success rate using these new reinforced engineering materials. Learn from Ultimaker's Product Manager of Materials and top chemical engineer Bart van As how you can take your 3D printing to that next level.
      • 1 reply
    • "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!