Jump to content
Ultimaker Community of 3D Printing Experts
illuminarti

FYI: Ulticontroller bugs with PID and Max Acceleration

Recommended Posts

Following on from my work on the retraction speed problems, I've been digging further into the Marlin source code, and discovered a couple of problems with the Ulticontroller (and yes one of these is also thanks to Bug-Finder-In-Chief, Joergen)...

I've written fixes for these, which I'll offer upstream, but for now, Ulticontroller users (or any panel come to that) might want to be vaguely aware of the following:

1) In Control->Temperature, the I and D settings for the PID are displayed wrongly (i is about 8 times too small, D about 8 times too large). If you use the controller to adjust these to the 'right' values you will actually be setting them wrongly.

2) After making changes to PID values in the Ulticontroller, the new values you set aren't actually used unless you save to the EEPROM and then reset the printer.

3) Similarly for Max Acceleration settings, any changes made in the UC wont take effect until you save them and then reset the printer. (Not even restoring the saved or default settings will have an effect - currently the maximum acceleration settings are read exactly once, at power-up/reset).

These aren't huge problems, unless you're trying to fiddle with these settings, then they are a real pain :-) Hopefully these fixes will make their way upstream before too long, but in the meantime if anyone wants to roll their own hex files, you can find my fork of Marlin here... this is what I'm using currently, but use at your own risk, of course:

https://github.com/illuminarti/Marlin.git

(You would want the Menu_Fixes branch - it is the current Ultimaker/Marlin_v1 with these fixes applied. It also includes last week's retraction speed fix - caution: your retractions may now be a lot faster than you are used to).

 

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.
      • 0 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!