Vertical Banding????

Discussion in 'Calibration, Help, and Troubleshooting' started by Chase.Wichert, Mar 29, 2016.

  1. Chase.Wichert

    Chase.Wichert Well-Known Member

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    Why am I getting his vertical banding and how do I solve it?
     

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  2. Kick2box

    Kick2box Well-Known Member

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    As it's not at the start: control your pulleys, they may wiggle.
     
  3. Chase.Wichert

    Chase.Wichert Well-Known Member

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    Little more clarification? All of the belts are tight..
     
  4. Kick2box

    Kick2box Well-Known Member

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    Loose grub-screws. Assumed you had nice prints before and your z is perfectly aligned, this normally is a belt-issue.
     
  5. Chase.Wichert

    Chase.Wichert Well-Known Member

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    Hmm I have everything loctited in, I have never done anything this big either...
     
  6. Chase.Wichert

    Chase.Wichert Well-Known Member

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    It also does it on all four sides, and not on the corners..
     
  7. Kick2box

    Kick2box Well-Known Member

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    The start is ok, so it should normally be something mechanical.
     
  8. Chase.Wichert

    Chase.Wichert Well-Known Member

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  9. Chase.Wichert

    Chase.Wichert Well-Known Member

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    All of the grubs appear to be tight... I'm not sure what else to check...
     
  10. Rob Heinzonly

    Rob Heinzonly Well-Known Member

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    According to this link, it could be one of three things:
    1. Printing too fast
    2. Mechanical issues
    3. Firmware acceleration
    Does this appear on the x- or y -axis ? Maybe you have to tune driver voltage.
     
  11. Chase.Wichert

    Chase.Wichert Well-Known Member

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    Yes it is on all four sides, I had acceleration at 1300, I just dropped it to 500 to see if that helps, I read it somewhere, and I am printing at 50mm/s
     
  12. Chase.Wichert

    Chase.Wichert Well-Known Member

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    I am kind of wondering if it has something to do with volcano, also I just switched my dual to a pro to make use of he entire print bed...
     
  13. Kick2box

    Kick2box Well-Known Member

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    Then it's the extruder pulsating. Check its calibration, a small change there can cause something like that. Maybe the extruder is simply to weak to follow, then you must slow down.
    Edit: just had another idea: maybe your hotend is not tight enough, as you changed from dual to pro.
     
    #13 Kick2box, Mar 29, 2016
    Last edited: Mar 29, 2016
  14. Chase.Wichert

    Chase.Wichert Well-Known Member

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    Hmm, I think it is pretty tight, I'll check how the print is going when I get home, Hopefully well... Because I am running out of time...
     
  15. Mike Oda

    Mike Oda Member

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    I've seen this before.... When this was not the usual suspects of loose belts and grub screws, it was because there was a bit of plastic in the extrusion path. This causes enough resistance to make the plastic jitter on its way to the hot end. It might sound crude but one way I solved this was to straighten out a paper clip and run it up and down the inside of the extruder path. This will dislodge that tiny bit of plastic and it will pass through the extruder.
     
  16. Chase.Wichert

    Chase.Wichert Well-Known Member

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    Interesting, I feel like it would be hard to get something stuck in a .8 nozzle..., if my current print still shows banding I will definitely clean it out. However I tightened one of my y axis belts it is now really tight, and my x axis belt, And decreased the acceleration to 500, something helped, however now I have zits all over my prints, I am thinking my filament has absorbed water, the 10kg spool...... But I have an airtight dog food container coming, along with desiccant so I can create a dry box.
     
  17. Mike Oda

    Mike Oda Member

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    What I was talking about wasn't necessarily anything in the nozzle but bits of melted plastic that adhere to the walls of the plastic portion of the extruder. It doesn't take much to create enough friction to cause the filament to stutter its way to the hot end. So if you've been printing a lot, when you withdraw the filament from the extruder, sometimes little threads of melted plastic can be left behind and stick to the plastic portion of the extruder. Inconsistent filament thickness could make this problem even more pronounced, so swollen / waterlogged plastic could be contributing to your issue. Overall, the smoothness with which your filament is traveling through your extruder could be the origin of this banding and anything that is interfering with it could make it worse.
     
  18. Henry feldman

    Henry feldman Well-Known Member

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    10kg spool! That's a lot of water absorption. You'll need some hefty amount of desiccant! But at least you can print the rocket from the reprap festival video...
     
  19. Chase.Wichert

    Chase.Wichert Well-Known Member

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    What's weird is that it prints really well at the bottom then all of a sudden banding...
     
  20. Mike Oda

    Mike Oda Member

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