Y axis binding

Discussion in 'Calibration, Help, and Troubleshooting' started by Chase.Wichert, Mar 1, 2016.

  1. Chase.Wichert

    Chase.Wichert Well-Known Member

    Joined:
    Mar 1, 2016
    Messages:
    774
    Likes Received:
    207
    I just put in the x and y axis in my big box and it sounds like the y axis bearings are binding when it gets within2-3 inches of the rear, I have everything loosened and it still does it... It basically just becomes choppy and sticky, almost like there is something wrong with the bearing, but it slides just fine the rest of the y axis...
     
  2. Chase.Wichert

    Chase.Wichert Well-Known Member

    Joined:
    Mar 1, 2016
    Messages:
    774
    Likes Received:
    207
    Okay so, apparently those linear bearings allow axial rotation in one direction, so to fix I just took the bearing off the rod and flipped it around.
     
  3. Archania

    Archania Well-Known Member

    Joined:
    Feb 17, 2016
    Messages:
    224
    Likes Received:
    51
    Sounded easy enough. Glad you got it.
     
  4. wfredette

    wfredette Well-Known Member

    Joined:
    Jan 11, 2016
    Messages:
    89
    Likes Received:
    25
    I've noticed the same problem. @Chase.Wichert, did you reverse both bearings? Will there be a similar problem with the bearings in the build table?
     
  5. Chase.Wichert

    Chase.Wichert Well-Known Member

    Joined:
    Mar 1, 2016
    Messages:
    774
    Likes Received:
    207
    Just the one that was skipping, it was pretty noticeable which one it was. I believe it is just how the bearings are. If they are both doing it then go ahead and reverse both, But I would just try one at a time.
     
  6. wfredette

    wfredette Well-Known Member

    Joined:
    Jan 11, 2016
    Messages:
    89
    Likes Received:
    25
    I was already beyond the step of installing the Y axis belts, as I'd thought maybe the binding was attributable to things not being tightened/trued up yet. It wasn't fun taking things apart. I'm still not convinced I've completely solved the problem, though it does feel better. Would have been a nice note to have included in the build instructions! Thanks for your help.
     
  7. Chase.Wichert

    Chase.Wichert Well-Known Member

    Joined:
    Mar 1, 2016
    Messages:
    774
    Likes Received:
    207
    No problem, after I flipped one, it was like butter, I had it all loosened up and was tweaking the frame and nothing really helped so I figured it was something with the bearing.
     
  8. UlrichKliegis

    UlrichKliegis Well-Known Member

    Joined:
    Sep 5, 2015
    Messages:
    187
    Likes Received:
    47
    I wonder if just taking the bearing off and putting it back in the same orientation would have helped too? I don't know of any explanation of the direction-sensitivity of the function of a linear bearing. Interesting how the long term stability of these bearings will look. Either, the problems you had can be traced back to any residual foreign matter remaining from the fabrication process, which shouldn't happen either, or the handling of the bearings, e.g. how to insert the rods into them correctly, is the source of those issues.
     
  9. Chase.Wichert

    Chase.Wichert Well-Known Member

    Joined:
    Mar 1, 2016
    Messages:
    774
    Likes Received:
    207
    Ive notice the same problem creep back in, I replace it with another bearing and all seems well. So I may need to buy some online...
     
  10. UlrichKliegis

    UlrichKliegis Well-Known Member

    Joined:
    Sep 5, 2015
    Messages:
    187
    Likes Received:
    47
    Is there no warranty from E3D's side on defective parts?
     
  11. Henry feldman

    Henry feldman Well-Known Member

    Joined:
    Sep 5, 2015
    Messages:
    969
    Likes Received:
    389
    Email support, Catriona is great getting replacement stuff to you quickly (for me it has been missing, and one broken).
     
  12. Chase.Wichert

    Chase.Wichert Well-Known Member

    Joined:
    Mar 1, 2016
    Messages:
    774
    Likes Received:
    207
    I ended up buying a pack of 4 from Amazon, should be here tomorrow. Hopefully one of the 4 will work. Or maybe even the bad one will work just fine in the z axis, being vertical...
     
  13. Chase.Wichert

    Chase.Wichert Well-Known Member

    Joined:
    Mar 1, 2016
    Messages:
    774
    Likes Received:
    207
    Yeah I am sick of taking the printer apart to get to the x/y axis, I think I have done it 3 times already. One was my fault, and of them were the bearings fault.
     
  14. Mike Kelly

    Mike Kelly Volunteer

    Joined:
    Mar 7, 2014
    Messages:
    444
    Likes Received:
    89
    Once I replaced my Y axis bearings I haven't needed to take apart the axis again.

    I wonder if the Y rods are suffering from similar issues that the Z had but it shows up more in bearing failure.
     
  15. Chase.Wichert

    Chase.Wichert Well-Known Member

    Joined:
    Mar 1, 2016
    Messages:
    774
    Likes Received:
    207
    I haven't received the ones I ordered from Amazon, however the bearing that was bad in the Y, I moved to the Z, and put a different one in the Y. All is good now. That and I added white lithium grease to everything.
     
    Mike Kelly likes this.
  16. Richard Barbosa

    Richard Barbosa Well-Known Member

    Joined:
    Sep 4, 2015
    Messages:
    48
    Likes Received:
    24
    *BINDING SOLUTION:

    If your X Axis Assembly bearings seems to bind as it approaches the Rear Y Axis Assembly it is because the spacing of the Rear Y Axis Assembly Brackets is wider than the distance between the 2 bearing brackets on the X Axis Assembly. First loosen the screws holding the rods/rails of the X Axis on both the R/S an L/S X Axis Assembly Brackets where the left and right bearing are. Then follow the assembly instructions as noted in the manual to install the XY Axis Assembly. Before you finish just push the X Axis Assembly back and forth and back again to the Rear Y Axis Assembly. This will cause the X Axis Assembly brackets to stretch out on the rods/rails and self adjust to the same width as all the brackets and your bearings will then be smooth and slippery as butter. Don't forget to retighten the screws that holds the rods/rails on both the R/S and L/S of the X Axis Assembly Brackets
     
  17. Chase.Wichert

    Chase.Wichert Well-Known Member

    Joined:
    Mar 1, 2016
    Messages:
    774
    Likes Received:
    207
    My bearing was binding simply by riding on the rod, all by itself.. but yes this is good advice.
     
  18. Spoon Unit

    Spoon Unit Well-Known Member

    Joined:
    Sep 6, 2015
    Messages:
    1,095
    Likes Received:
    322
    During that final assembly process I had extremely lumpy Y movement, toward the back part as described above. I didn't have my mind around everything that works together at that stage, but as I went through the commissioning process everything just got smoother and smoother. I don't relish the idea of having to redo that, but it's always a double-edged sword. The pain of assembling often teaches you something. Given Chase's recommendation on thread locker, I have a feeling i'll need to check all screw regularly and maybe at some point disassemble in order to apply some myself. I'll wait till I have that problem first.
     
    #18 Spoon Unit, Mar 12, 2016
    Last edited: Mar 12, 2016
  19. Richard Barbosa

    Richard Barbosa Well-Known Member

    Joined:
    Sep 4, 2015
    Messages:
    48
    Likes Received:
    24
    I had to replace all 8 crappy bearings with new ones. Actually Amazon carries, both, cheap and quality bearings and Servo City is great. I had made a video of the bad bearings to show E3D and was told that they were in talks about the bearings but that was the last I heard of it. I can only assume they are well aware that the bearings are not cutting the mustard.
     
  20. Chase.Wichert

    Chase.Wichert Well-Known Member

    Joined:
    Mar 1, 2016
    Messages:
    774
    Likes Received:
    207
    Yup, they told me the same thing.
     

Share This Page