Jump to content
UltiMaker Community of 3D Printing Experts

Acrylic bed shifting during printing


Recommended Posts

Posted · Acrylic bed shifting during printing

Hi all,

Everything has gone pretty swimmingly with my printer for awhile now, however, just recently I have had a new problem creep up. The issue is that, I suppose, a few print edges tend to warp upwards beneath the hot end (very slightly), and depending on the 3d model, contact the hot end as it passes over those warped-upwards portions. The warping is not visible in the final print, but I have returned to prints a couple times to see that the acrylic bed has shifted all the way to the wrong side, permitting the screws to escape from the holes in the bed, thus allowing the entire bed to rise a centimeter while sitting on the springs. This is not good, obviously, as now your print bed has shifted in the middle of a print. Although, I will admit that it has resulted in some pretty cool (though undesired) effects in the resulting print.

My question: Is there any way to prevent the bed from sliding out of position during a print? I'm not sure why this has become more of an issue recently, and it does only happen with certain prints (typically with moves in the X direction), but it is highly annoying.


  • Link to post
    Share on other sites

    Posted · Acrylic bed shifting during printing

    Can you post a photo of the part?

    This tends to happen when you have overhang slopes. The shrinkage of higher layers pulls inward and that hinges these outward facing slopes more up than in (with vertical walls it ends up more lifting the corners of the part instead).

    There's lots of tricks to reducing this. For example you could include support (exterior only). In this case the support helps pull down. You can reduce the pulling forces by adding more vertical and/or horizontal holes in the walls between the lifting areas, less fan, less infill, making the part more squarish (less long and skinny), using a heated chamber, use PLA45 (less shrinkage), add support in the cad, press down on lifting parts after every 5th layer with a putty knife, and more techniques.

    I'd like to see what the part looks like first.


  • Link to post
    Share on other sites

    Posted · Acrylic bed shifting during printing

    Yeah this is a PITA.

    I think I'm going to cut a new bed, using a lasercutter to etch a shallow counterbore for the head of the screw to drop in to at the end of the slots. You could probably achieve the same thing with a drill bit.


  • Link to post
    Share on other sites

    • 2 weeks later...

    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

      • UltiMaker Cura 5.3 stable released
        In this stable release, Cura 5.3 achieves yet another huge leap forward in 3D printing thanks to material interlocking! As well as introducing an expanded recommended print settings menu and lots of print quality improvements. Not to mention, a whole bunch of new printer profiles for non-UltiMaker printers!
          • Thanks
          • Like
        • 21 replies
      • Here it is. The new UltiMaker S7
        The UltiMaker S7 is built on the success of the UltiMaker S5 and its design decisions were heavily based on feedback from customers.
        So what’s new?
        The obvious change is the S7’s height. It now includes an integrated Air Manager. This filters the exhaust air of every print and also improves build temperature stability. To further enclose the build chamber the S7 only has one magnetically latched door.
        The build stack has also been completely redesigned. A PEI-coated flexible steel build plate makes a big difference to productivity. Not only do you not need tools to pop a printed part off. But we also don’t recommend using or adhesion structures for UltiMaker materials (except PC, because...it’s PC). Along with that, 4 pins and 25 magnets make it easy to replace the flex plate perfectly – even with one hand.
        The re-engineered print head has an inductive sensor which reduces noise when probing the build plate. This effectively makes it much harder to not achieve a perfect first layer, improving overall print success. We also reversed the front fan direction (fewer plastic hairs, less maintenance), made the print core door magnets stronger, and add a sensor that helps avoid flooding.

        The UltiMaker S7 also includes quality of life improvements:
        Reliable bed tilt compensation (no more thumbscrews) 2.4 and 5 GHz Wi-Fi A 1080p camera (mounted higher for a better view) Compatibility with 280+ Marketplace materials Compatibility with S5 project files (no reslicing needed) And a whole lot more  
        Curious to see the S7 in action?
        We’re hosting a free tech demo on February 7.
        It will be live and you can ask any questions to our CTO, Miguel Calvo.
        Register here for the Webinar
          • Like
        • 18 replies
      • UltiMaker Cura Alpha 🎄 Tree Support Spotlight 🎄
        Are you a fan of tree support, but dislike the removal process and the amount of filament it uses? Then we would like to invite you to try this special release of UltiMaker Cura. Brought to you by our special community contributor @thomasrahm
        We generated a special version of Cura 5.2 called 5.3.0 Alpha + Xmas. The only changes we introduced compared to UltiMaker Cura 5.2.1 are those which are needed for the new supports. So keep in mind, this is not a sneak peek for Cura 5.3 (there are some really cool new features coming up) but a spotlight release highlighting this new version of tree supports.  
          • Like
        • 22 replies
    • Create New...