Jump to content
barelko_com

No more error - MINTEMP on Ultimaker Original + AD597 controller !!! Problem is solved totally !!!

Recommended Posts

Posted · No more error - MINTEMP on Ultimaker Original + AD597 controller !!! Problem is solved totally !!!

Hi guys,

maybe my experience will help someone.

So, I've spend a lot of time to solve temperature fluctuation and error type: MINTEMP err

I cursed AD597 - huge amount of electric noise was collected by a thermocouple, when I turned on stepper motors that was unacceptable at all, also problem will rise when you have not good power supply with big high frequency noise.

I will skip my all attempts with wrong wiring etc how its was says on many forums, so the main error in wrong datasheet and controller AD597 design itself.

The solution is simple - Instead of grounding pin (8) of chip, you must include a (pull-down) resistor, 10k-100k, between minus thermocouple pin and the ground. This greatly decreased the electric-noise-induced current picked by the thermocouple, improving your accuracy to about +/-0.1C.

Also I put 4,7mF ceramic capacitor to filter +5V and I used 0.22uF ceramic capacitor in OUT signal, that improved my accuracy to at least +/- 0.02C. A brief note, different types of capacitors do differ. For low pass filters, use ceramic!

My handdrawn pics and mods photos included!

P60121-220336.jpg

P60121-220047.jpg

P60121-220020.jpg

P60121-220108.jpg

  • Like 2

Share this post


Link to post
Share on other sites
Posted · No more error - MINTEMP on Ultimaker Original + AD597 controller !!! Problem is solved totally !!!

Great post! Wow! Nice analysis. I will tell one of the Electrical Engineers at Ultimaker about this!

I hope they fix this in a future release of the UMO. The UMO keeps changing and getting better with silent upgrades every year.

I don't get MINTEMP on my UMO but I know many people have had issues.

The "D" term in the PID controller is very sensitive to noise/error so getting better than .1C accuracy would make the PID controller much better.

Share this post


Link to post
Share on other sites
Posted · No more error - MINTEMP on Ultimaker Original + AD597 controller !!! Problem is solved totally !!!

Sounds good! Nice results!

This design was before my time, but I know we've had issues with it. That is one of the reasons we switched to a PT100 for temperature measurement in the UM2 and UMO+.

Because the UMO is no longer in production, we only have a small stock left of these boards for spare parts. Therefore it's not worth it to upgrade it I am afraid.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Our picks

    • Ultimaker Cura 4.0 | Stable available!
      Ultimaker Cura 4.0 is mainly focused on the improved user interface and cloud integration.
      As always, we want to collect your user feedback for this release. If there are any improvements you can think of, feel free to mention it here and help us to shape the next release.
      • 23 replies
×
×
  • Create New...

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!