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Solved Zaggy Z axis?

Discussion in 'Troubleshooting' started by nierro, Apr 10, 2015.

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  1. nierro

    nierro Member

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    It started doing this, and I don't know what it is. Only thing I can think of is that it's a Z axis and I couldn't see anything on visual troubleshooting for it. I might of missed something but, yeah. I know it can't be the nozzle, because I changed it our between prints, and it did the same thing.

    Filament type:pLA
    Extruding Temp: 210~200
    Bed Temp: 80 1st layer 40 for rest.
    Bed makeup: painter's tape
    Filament dressing: canola oil

    The things at the bottom are uncleaned brims, but as you can see it's zig zagging.
    [​IMG] [​IMG] [​IMG] [​IMG]
    Any suggestion?
     
    #1 nierro, Apr 10, 2015
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Are the bulges the same all the away around (all sides)? It does sort of look that way from what I can see, but you know how it was printed (what orientation).

    If so it might just be over extrusion. Or it could be a loose component on the X/Y driver axis if the ripples are limited to one of those axis.

    More details would help.
     
    #2 mark tomlinson, Apr 10, 2015
  3. nierro

    nierro Member

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    It's more like the layer shifted more than just hanging or bulging
     
    #3 nierro, Apr 10, 2015
  4. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Then you have a loose belt or other drive component (like a drive cog on a motor shaft). Check belt tensions and all set screws.
    I like Loctite on the set screws...
     
    #4 mark tomlinson, Apr 10, 2015
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  5. nierro

    nierro Member

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    I'll check when I get home. Isn't that kinda bad? What if you want to undo the screw at one point or another? Lol
    But yeah, it seems like I have problem with it every other day. Kinda frustrating
     
    #5 nierro, Apr 10, 2015
  6. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    Blue loctite can be removed. Red... not so much.
     
    #6 mark tomlinson, Apr 10, 2015
  7. nierro

    nierro Member

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    Learn something new ever 5 min (ever since I got a 3d printer)
     
    #7 nierro, Apr 10, 2015
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  8. nierro

    nierro Member

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    So good news. Turns out my X Axis belt was loose. tighten it up and started a print. Lets see how it turns out.....
     
    #8 nierro, Apr 10, 2015
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  9. nierro

    nierro Member

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    Okay, so I tighten the X and Y axis belt, and I still have the problem. I did find something odd though. The imperfections are happening on the same layers. These were done on different print job.
    Also, I checked, and it's not over extruding.
    One on the left is done using 0.2 Layer height with 1.25MM nozzle. The one on the right was done 0.4 layer height with 4.0MM nozzle. Each of those "shifted layers" are multiple layers.
    [​IMG]
     
    #9 nierro, Apr 10, 2015
  10. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
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    #10 mark tomlinson, Apr 11, 2015
  11. Stephen Capistron

    Stephen Capistron Active Member

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    #11 Stephen Capistron, Apr 11, 2015
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  12. nierro

    nierro Member

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    Yeah, I saw those video when he 1st uploaded it. but he also said on the other video the new robo R1 (which is the one that I have with the Z rod stabilizer) didn't need this because of new designed coupling. But I guess when I get home, I'll give this a try.
     
    #12 nierro, Apr 11, 2015
  13. Stephen Capistron

    Stephen Capistron Active Member

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    I was experiencing similar z problems event with the stabilizers. I'd give his solution a shot.
     
    #13 Stephen Capistron, Apr 11, 2015
  14. nierro

    nierro Member

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    Everyone quick,
    Which tap do I buy? I have the newest ver of the robo R1. I need to know the thread size I guess?
     
    #14 nierro, Apr 11, 2015
  15. nierro

    nierro Member

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    Okay. So I took everything apart. And noticed one of my coupling was off. It was leaning to one side. So I kept banding It till it (kkinda) got straight. Print came out whole lot better Too
     
    #15 nierro, Apr 11, 2015
  16. Stephen Capistron

    Stephen Capistron Active Member

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    It is an M8 thread. One option would be to not tap it and just force thread it into the hole.
     
    #16 Stephen Capistron, Apr 12, 2015
  17. nierro

    nierro Member

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    it wasn't the thread that was giving me trouble, it was the coupling it self.
     
    #17 nierro, Apr 12, 2015
  18. Stephen Capistron

    Stephen Capistron Active Member

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    I'm pretty sure just about everyone that has had success with reducing ribbing has done something to firm up that connection. Either linear steppers, a rigid coupling, or filling the grooves with silicone, ...
     
    #18 Stephen Capistron, Apr 12, 2015
  19. nierro

    nierro Member

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    Yall wanna hear something funny. The problem came back after 2 prints. But my coupler isn't leaning this time. Son of a ....
     
    #19 nierro, Apr 12, 2015
  20. Mike Kelly

    Mike Kelly Volunteer

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    Did you tighten the set screw along with the belts?
     
    #20 Mike Kelly, Apr 12, 2015
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