Jump to content

Recommended Posts

Posted · Communicating via USB while printing from SD?

Hi,

the topic basically says all: Is it possible (honestly not tried yet...) or better asked can it lead to problems (too much traffic for the little atmega to handle?) when I try to send gcode commands via USB during a print from the SD card? (Of course no movement commands just status requests)

Cheers,

derbroti

  • Link to post
    Share on other sites

    Posted (edited) · Communicating via USB while printing from SD?

    Ok, I read through the marlin firmware and the result (if I got it right) is okay.

    The main loop first reads from serial in a loop until the buffer (8 commands) is full or no more serial communication happens and then from SD again in a loop until card EOF or buffer full.

    So, if I send too many commands fast enough, I could fill the buffer with serial commands (as they will be read first) and starve the SD communication and make my print fail...

    ...this should be unlikely because generally, when just occasionally sneak in a command it should work fine as the serial loop would stop and it can happily fill up the buffer with SD commands.

    Edited by Guest
  • 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

      • Help Us Improve Cura – Join the Ultimaker Research Program
        🚀 Help Shape the Future of Cura and Digital Factory – Join Our Power User Research Program!
        We’re looking for active users of Cura and Digital Factory — across professional and educational use cases — to help us improve the next generation of our tools.
        Our Power User Research Program kicks off with a quick 15-minute interview to learn about your setup and workflows. If selected, you’ll be invited into a small group of users who get early access to features and help us shape the future of 3D printing software.

        🧪 What to Expect:
        A short 15-minute kickoff interview to help us get to know you If selected, bi-monthly research sessions (15–30 minutes) where we’ll test features, review workflows, or gather feedback Occasional invites to try out early prototypes or vote on upcoming improvements
        🎁 What You’ll Get:
         
        Selected participants receive a free 1-year Studio or Classroom license Early access to new features and tools A direct voice in what we build next
        👉 Interested? Please fill out this quick form
        Your feedback helps us make Cura Cloud more powerful, more intuitive, and more aligned with how you actually print and manage your workflow.
        Thanks for being part of the community,

        — The Ultimaker Software Team
        • 0 replies
      • Cura 5.10 stable released!
        The full stable release of Cura 5.10 has arrived, and it brings support for the new Ultimaker S8, as well as new materials and profiles for previously supported UltiMaker printers. Additionally, you can now control your models in Cura using a 3D SpaceMouse and more!
          • Like
        • 18 replies
    ×
    ×
    • Create New...