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Unresolved Layers offset on the X Axis

Discussion in 'Troubleshooting' started by Dan, Feb 1, 2015.

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  1. Dan

    Dan Guest

    Hi,

    I'm in the process of trying to improve the quality of my Beta Model Robo3d. I just printed a rectangle and the layers are misaligned on the X-axis (left/right side of the print) pretty severely. There are fairly well aligned on the top/bottom sides of the rectangle.

    In checking my belts I was pretty sure the X-axis belt was tight and the Y-axis was loose.

    What am I checking for if the layers are mis-aligned on the X-axis?
     
    #1 Dan, Feb 1, 2015
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    The belt is the biggest suspect*.
    Toss up a picture though and we can take a closer look.

    (X is left/right and y is forward/back if you are looking at it from the front or back).

    *but it might be a loose drive coupler or pulley so check the entire X drive from the motor out to the carriage. A single slightly loose nut is enough.
     
    #2 mark tomlinson, Feb 1, 2015
  3. Dan

    Dan Guest

    Yes, left/right misalignment. The belt is tight for sure. I just watched the assembly video (mine was preassembled) and my belt is at least as tight as the one in the video.

    Is there a good link that visually shows what I should be inspecting/tightening?

    Also, I'll post a picture shortly.
     
    #3 Dan, Feb 1, 2015
  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    The belt drive itself.
    Most importantly the cog on the drive motor shaft that moves the belt (make sire it is tight on the shaft).
    When I got mine almost every set screw on every drive component was loose. So every cog/coupler needed to be tightened to the shaft*.

    If none of those are loose and the belt is tight enough then I am not sure, the video will help.


    *loctite, never loose again
     
    #4 mark tomlinson, Feb 1, 2015
  5. Dan

    Dan Guest

    Ok, here are two photos. You can see the rear edge is almost flawless. I thought the Y-axis belt felt loose but I'm not messing with it if the Y-axis is coming out this good.

    You can see the other image shows the X-axis is all over the place. The X-axis belt feels tighter than the Y belt for sure. I'll tighten up all the screws I can see.
     

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    #5 Dan, Feb 1, 2015
  6. Mike Kelly

    Mike Kelly Volunteer

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    Sure looks like a loose pulley to me. Check the set screw on it.
     
    #6 Mike Kelly, Feb 1, 2015
  7. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Yes, I agree with Mike. This is absolutely a loose component in that axis drive train.
    The belt being loose is low-hanging fruit, but a loose pulley or drive gear will do the same thing.
     
    #7 mark tomlinson, Feb 1, 2015
  8. Dan

    Dan Guest

    The gearhead for the x-axis slides back and forth on the shaft. I assume this means it is loose slightly. What size allen wrench ss that? I have one too small and one too big. lol
     
    #8 Dan, Feb 1, 2015
  9. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Ugh, good question from which I do not have the answer handy.
    Let me go see if I can figure it out...
     
    #9 mark tomlinson, Feb 1, 2015
  10. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    On my bundle the small metric #5 (smallest one on the ring) fits it.
     
    #10 mark tomlinson, Feb 1, 2015
  11. Dan

    Dan Guest

    Can't find my metric set and the game starts in 45 minutes!!! grrr....
     
    #11 Dan, Feb 1, 2015
  12. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    :(

    Good game so far.
     
    #12 mark tomlinson, Feb 1, 2015
  13. Mike Kelly

    Mike Kelly Volunteer

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    I believe it's a 1.5mm
     
    #13 Mike Kelly, Feb 1, 2015
  14. Dan

    Dan Guest

    Well my Pats won so that fact that the smallest allen wrench I had was 2.5mm isn't bumming me as much. I'll head to Home Depot in the morning. Thanks for the help guys. Looking forward to getting this locked down and fixed!
     
    #14 Dan, Feb 1, 2015
  15. Dan

    Dan Guest

    Mark and Mike,

    Thanks for all the help. I tightened the two lock nuts on the x-axis gear and from what I can see my test print is going great. I'll post a picture in a couple hours when its done and hopefully you guys can tell me if I need any more tweaking.

    Thanks again!
     
    #15 Dan, Feb 2, 2015
    3 people like this.
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