Jump to content
Ultimaker Community of 3D Printing Experts

Recommended Posts

Posted · calibrating x, y

Steppers don't need calibration. They always do 200 steps per rotation. The rest is all fixed mechanical. Resulting in the right number of steps per mm of movement.

But... are you printing with PLA or ABS? ABS shrinks, so that would explain the 2mm difference. PLA also shrinks a bit, but only a tiny bit compared to ABS.

Other causes for smaller objects could be wrong slicing configuration settings.

  • Link to post
    Share on other sites
    Posted · calibrating x, y

    Well, now that your printer is working, it's recommended to upgrade to Marlin to start with, gives much better prints.

    The Beta3 from SkeinPyPy:

    https://github.com/daid/SkeinPyPy/downloads

    assists you in upgrading to Marlin, and also contains an easier configurable Skeinforge.

    Not sure what could be wrong with your Skeinforge settings, but I made this display frame, sliced with SkeinPyPy. And it was spot on size wise. The hole for the display was exactly as the measured size of the display itself. It wouldn't have fit if it had become 2mm smaller.

  • Link to post
    Share on other sites
    Posted · calibrating x, y

    You might be using an old firmware from prior to October 2011.

    The correct 1/16 steps per mm is 78.7402

    if you get the current Marlin installed, the value is set correctly:

    #define DEFAULT_AXIS_STEPS_PER_UNIT {78.7402,78.7402,200*8/3,865.888}

    alternatively, you can add the following line in the beginning of your gcode:

    M92 X78.7402 Y78.7402

    That should make 100mm 100mm... at least on my UM... if that is not solving the issue, you might want to look into loose belt issues, if there is too much or any slack, the precision goes down.

  • 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

      • Talking additive | The 3D printing podcast
        Why should we be the only ones asking questions? Join us and ask Jabil all your questions on September 22nd 5pm CET
          • Like
        • 3 replies
      • Ultimaker masterclass: Optimizing your Ultimaker Cura workflow
        Save your seat for either broadcast on September 23.
        What will you learn?
        · Best practices for iterative print preparation and every lesson you should learn from each print
        · The right way to use per-object settings and when they are most useful
        · Easy-to-use resources for anyone who wants to develop their own printer definitions, plugins, or print profiles
        · How to optimize print profile settings and whether to “keep” or “discard” changes
        · When is the right time to export your drawing from CAD? (Based on Ultimaker Cura’s surprising power as 3D control software)
        · And a whole lot more tips and tricks!
         
        How can I join?
        This free masterclass will take place twice:
        1. 11am CEST (5pm SGT, 5am EDT)
        2. 5pm CEST (11am EDT, 8am PDT, 11pm SGT)
          • Like
        • 0 replies
      • Do you use 3D printing at work? Let us know
        It doesn't matter if you are using 1 Ultimaker or 10, there is inspiration in everything. We're looking for ...
        • 1 reply
    ×
    ×
    • Create New...