Jump to content
UltiMaker Community of 3D Printing Experts

Slider Blocks not holding the x-axis rod


ShinerG
 Share

Recommended Posts

Posted · Slider Blocks not holding the x-axis rod

Hi, I'm hoping someone will be able to help me.  I've had 4 failed prints in as many days now.  I've tightened up the pulleys and the short belts onto the stepper motors. I had luckily printed two alignment clips to ensure that the axis rods were aligned.  But the problem is continuing, the slider blocks are not holding the x-axis rod.  The rear one pops out mostly, but they're both not adequately holding the rod.  It's not loose - just that they can release the rod if it knocked against a building print for example, but the prints are fine - until they stop. There's no evidence of the print head knocking against anything.  In Cura I've changed the infill to be 0% and the line number to be 10, to minimise the x-y movements and to fill the interior with just perimeter offsets.  This helps to reduce the jerky movements - but it is not solving the problem.

 

  I don't want to tape, or otherwise hold the rod in place as I'm concerned that this is the safety mechanism to ensure that the motors are not damaged if the axes are not aligned and forced to print skewed. Can these slider blocks' clasping feature wear out and loosen over time - is this a thing?  I've tried to buy the slider blocks and belts from my re-seller, but they're not available in their online shop. TIA.

  • Link to post
    Share on other sites

    Posted · Slider Blocks not holding the x-axis rod

    You didn't say what kind of printer this is.

     

    Is this a UM3 with white blocks?  If so then this is a known problem and contact your reseller and they will send you free replacements.  Or contact igo3d.  The white blocks crack.  UM switched to black blocks that work much better over a year ago.

  • Link to post
    Share on other sites

    Posted · Slider Blocks not holding the x-axis rod

    Hi Gr5,

      Sorry, I didn't but I'd tagged the UM3.  I've the black ones, so it might be just bad luck. I've gone around the whole unit tightening everything and have another print on at the moment and it looks good - so far.  I was in touch with my re-seller and the slider block plastic parts are only a euro plus VAT and delivery, so I'm going to order 4 with the belts.  I'd prefer to be looking at them instead of for them, when they do need to be replaced.    It's a pain, but I feel relieved to know that they are consumables and do wear out. I was more concerned that it shouldn't be happening or a known problem.

  • Link to post
    Share on other sites

    Posted · Slider Blocks not holding the x-axis rod

    The black ones shouldn't wear out but the white ones do.  Are there cracks in the blocks?  If so then yes definitely it's a simple fix.

     

  • Link to post
    Share on other sites

    Posted · Slider Blocks not holding the x-axis rod

    Hi again Gr5,

     There are no cracks, at least visible to the naked eye.  I'd to abort this print too, as the rear end of the y-axis bar popped out again.  I was trying to work out what I changed lately to make it fail - I oiled the printhead's rods - their entire lengths last week.  So I think it's as simple as that (un)fortunately!  I've wiped them down and added a single circumferential-length of Scotch 3M Magic Tape at the point where the rear rod will be gripped by the slider block.  The slippery rods combined with the loose slider could have only one ending.  I hope that this print will work and get me through my customer orders while I wait for the new slider blocks to arrive. 

  • Link to post
    Share on other sites

    Posted · Slider Blocks not holding the x-axis rod

    Putting on new slider blocks is not easy.  I built a custom tool/jig (out of a block of wood and nails I think) to do it as it was difficult.  Some people do it in place on the printer: pop open the old ones, pop on the new one in place.  It didn't occur to me to do this.  I spoke with someone who does this professionally (changed dozens of printers from white to black blocks) and he said he takes the gantry completely apart and does it the way I did it.  I don't know which is easier though.

     

  • Link to post
    Share on other sites

    Posted · Slider Blocks not holding the x-axis rod

    Thanks again Gr5,

     

      I came across this great set-by-step tutorial. It's well written, but I'll have to re-read it a few times before I dig into it.  I've become spoilt in the age of YouTube - my skills at extracting the info off the page aren't what they were :) 

     

     https://fbrc8.zendesk.com/hc/en-us/articles/207813353-Replacing-Parts-on-the-X-Y-Axis

  • 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
     Share

    • Our picks

      • 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
        • 10 replies
      • UltiMaker Cura 5.3.0-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
        • 16 replies
      • New here? Get ahead with a free onboarding course
        Hi,
         
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
          • Like
        • 14 replies
    ×
    ×
    • Create New...