Jump to content
Ultimaker Community of 3D Printing Experts

Y Offset on 2nd Object


Recommended Posts

Posted · Y Offset on 2nd Object

I'm having a very odd problem in the past 2 days.

It seems that when I print multiple objects, the first layer shifts after the brim is printed. You can see what I'm talking about in the attached photo.

The first object (right) printed just fine, but the second (left) shifted after the brim finished.

I'm printing via OctoPrint from my Raspberry Pi. . . .

I saw that people have had similar issues that may have been cleared up after reflashing firmware.

I'll give that a shot tonight, but in the meantime, anyone have any thoughts?

Best,

Chris

Y Offset

 

  • Share this post


    Link to post
    Share on other sites
    Posted · Y Offset on 2nd Object

    This is most likely a hardware issue and not a software issue. There was probably a very high acceleration between brim and part. I would mark the 6 pulleys for the Y axis but almost always it is one of the 2 pulleys on the short belt that slipped. Alternatively it could be missed steps and it *is* possible that firmware messed up but very unlikely.

    You probably just have a setscrew that has worked its way loose over the years. Tighten the hell out of the motor one and the other one on the short belt. Enough so that the allen wrench twists quite a bit. But don't break your wrench.

     

  • Share this post


    Link to post
    Share on other sites
    Posted · Y Offset on 2nd Object

    No short pulleys in my setup. I went direct drive on the motors. I will check the set screws on the couplers though.

    Out of curiosity, is there any reason not to use a little dab of locktite on the set screws to avoid things like this in the future?

     

  • Share this post


    Link to post
    Share on other sites
    Posted · Y Offset on 2nd Object

    Are you sure the fan isn't catching on the first print under some circumstances. I mean I know it got the brim down ok, but based on the photo at least, it looks like it would be pretty tight to fit the fan into the gap between the parts?

     

  • Share this post


    Link to post
    Share on other sites
    Posted · Y Offset on 2nd Object

    Are you sure the fan isn't catching on the first print under some circumstances. I mean I know it got the brim down ok, but based on the photo at least, it looks like it would be pretty tight to fit the fan into the gap between the parts?

     

    Good Call! I didn't even think to check that. I never did change the print head size in the machine settings when I popped the UBIS on.

    My gut tells me that this is the problem.

     

  • 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

      • 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...