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Unresolved Z-AXIS Ribbing

Discussion in 'Troubleshooting' started by Simonpackman1, Sep 12, 2015.

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  1. Simonpackman1

    Simonpackman1 Member

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    This is identical to my prints. The real problem is that its causing poor adhesion on my layers and causes cracking.
     
    #21 Simonpackman1, Sep 13, 2015
  2. Simonpackman1

    Simonpackman1 Member

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    after switching to the set screws i got a difference but its still visible. Maybe someone who doesn't print wouldnt notice but it bugs the hell out of me and its cause my layers to split apart. I'm going to increase the number of perimeters and see if that has any impact as far as preventing the layers from separating.
     
    #22 Simonpackman1, Sep 13, 2015
  3. Sonny's Robo3D

    Sonny's Robo3D Member

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    I installed the lead screw upgrade - here is a quick before and after. I think the "after" would have been better, but I messed up and printed it at a higher temperature than usual for PLA
     

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    #23 Sonny's Robo3D, Sep 13, 2015
  4. Mike Kelly

    Mike Kelly Volunteer

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    Sonny is one or both of your lead screws wobbling?
     
    #24 Mike Kelly, Sep 14, 2015
  5. Sonny's Robo3D

    Sonny's Robo3D Member

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    no noticeable wobble. I even did the test you recommended, clamping the stepper motor on my desk and checking with a ruler. Should my prints be better?
     
    #25 Sonny's Robo3D, Sep 14, 2015
  6. Mike Kelly

    Mike Kelly Volunteer

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    #26 Mike Kelly, Sep 14, 2015
  7. Sonny's Robo3D

    Sonny's Robo3D Member

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    yeah man definitely - putting it to print right now - using .3mm layer height, 2 perimeters - 3 top/bottom. Unless you say I should try something else
     
    #27 Sonny's Robo3D, Sep 14, 2015
  8. Mike Kelly

    Mike Kelly Volunteer

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    That's fine
     
    #28 Mike Kelly, Sep 14, 2015
  9. Sonny's Robo3D

    Sonny's Robo3D Member

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    Here is the z resonance test - Seems to be okay until the top where for some reason it shifted a bit then when right back to form
     

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    #29 Sonny's Robo3D, Sep 14, 2015
  10. Mike Kelly

    Mike Kelly Volunteer

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    That does look pretty good. Might be a touch of over extrusion or possible a hot stepper motor.
     
    #30 Mike Kelly, Sep 14, 2015
  11. Sonny's Robo3D

    Sonny's Robo3D Member

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    best print I have ever gotten honestly - since my z-ribbing was so bad I never even got to play with anything else. What would be your advice to go forward? How do I check for a hot stepper motor?
     
    #31 Sonny's Robo3D, Sep 14, 2015
  12. daniel871

    daniel871 Well-Known Member

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    Touch it.

    If it burns, it's running hotter than it should.
     
    #32 daniel871, Sep 14, 2015
  13. Sonny's Robo3D

    Sonny's Robo3D Member

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    duh lol - ok - printing something out again to see how hot it gets.
     
    #33 Sonny's Robo3D, Sep 14, 2015
  14. Mike Kelly

    Mike Kelly Volunteer

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    Woops I meant Z axis stepper driver, though the motor might also be getting hot. What height did that print come out at?
     
    #34 Mike Kelly, Sep 14, 2015
  15. Sonny's Robo3D

    Sonny's Robo3D Member

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    It came out exactly 150mm
     
    #35 Sonny's Robo3D, Sep 14, 2015
  16. Mike Kelly

    Mike Kelly Volunteer

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    That's good then, probably not the Z axis stepper system then. Was this PLA or ABS? I'd double check all your set screws are secured down tight and that your belts are snug.

    What about extrusion calibration? done that yet?

     
    #36 Mike Kelly, Sep 14, 2015
  17. Sonny's Robo3D

    Sonny's Robo3D Member

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    Used PLA. I just checked everything, belts snug and my set screws are unmovable. I did the calibration when I first got my printer (mistakenly thought that was causing all the z-ribbing and banding) But going to calibrate mine now - will let you know how it goes (Thanks MK - you always looking out)
     
    #37 Sonny's Robo3D, Sep 14, 2015
    Last edited: Sep 14, 2015
  18. Sonny's Robo3D

    Sonny's Robo3D Member

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    ok so doing the calibration test - it comes out that I'm under extruding by a bit - original e-step was 723.38 and now this calibration test says I should set it at 738.14. Does that make sense to you?
     
    #38 Sonny's Robo3D, Sep 14, 2015
  19. Mike Kelly

    Mike Kelly Volunteer

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    Hmm maybe. It might not be that bad just something seems a little shakey.
     
    #39 Mike Kelly, Sep 14, 2015
  20. daniel871

    daniel871 Well-Known Member

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    Everyone's esteps will be slightly different because every motor will be slightly different/using a slightly different amount of current when working.

    As long as the testing checks out when you set the steps you should be good.
     
    #40 daniel871, Sep 14, 2015
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