Lines in prints

Submitted ⁨⁨10⁩ ⁨months⁩ ago⁩ by ⁨root@lemmy.world⁩ to ⁨3dprinting@lemmy.world⁩

https://lemmy.world/pictrs/image/93664201-001b-46a4-bbe6-f6da412bb2c6.jpeg

Just about all of my prints have these lines at around the same heights, and I can’t figure out why. I tried changing the nozzle, changing the layer height from 0.15 to 0.12, and changing the speed from 60mm to 40mm. All of these seemed to have helped a bit, yet they remain. I was thinking maybe as the prints get to a certain height, the shaking of the bed (Prusa MK2) caused the layers to be slightly offset perhaps. Anyone have any other ideas?

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Comments

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IMALlama@lemmy.world ⁨10⁩ ⁨months⁩ ago
Horizontal banding can be caused by a few things

the slicer making the nozzle move differently between layers because there are different features in different layers. You can usually see this in the sliced gcode preview with something like nozzle speed

inconsistent extrusion due to variation in hot end temp and/or filament width

lead screw wobble. This will show up as a repeatable pattern along the z axis

binding in the z-axis

something loose, most likely on your gantry

If you print two different models and it happens at the same z height you can basically guarantee it’s a mechanical issue. If it’s more random you’ll need to troubleshoot further.
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- marcos@lemmy.world ⁨10⁩ ⁨months⁩ ago
  
  inconsistent extrusion due to variation in hot end temp and/or filament width
  
  Also, a moist filament.
  
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ekZepp@lemmy.world ⁨10⁩ ⁨months⁩ ago
Tight the X and Y axis screws and be sure the printer sits on a stable base.

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WaterWaiver@aussie.zone ⁨10⁩ ⁨months⁩ ago
The fact the lines are at the same height suggests something is wrong with your Z axis. Can you post photos of your printer, including the Z rails and/or screws?

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- root@lemmy.world ⁨10⁩ ⁨months⁩ ago
  Good point. I knew it had to be something systematic, but didn’t really know where to check from there. Here is the left side and here is the right.
  
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naevaTheRat@lemmy.dbzer0.com ⁨10⁩ ⁨months⁩ ago
It could be skipped steps, a warped Z axis, lash in the axis. It doesn’t look like ringing to me.

If your steppers run too hot or against too much resistance that’d be the first thing I’d check. As well as give the axes a bit of a yank and ensure it’s all to the German spec.

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FuglyDuck@lemmy.world ⁨10⁩ ⁨months⁩ ago
Along with ekZepp’s, check the z carriage as well- both the rail carriages for play and the lead screw for straightness.

I’ve seen similar happening on my bro’s ender, and he had to install a brace going up from the front of the printer to the top of the upright, but I’m not sure how rigid a mk2 is.

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- root@lemmy.world ⁨10⁩ ⁨months⁩ ago
  It does seem like one of the screws it touching the side of the stabilizer at the top, and the other is perfectly straight and isn’t, so I might need to look into that. Thanks for pointing me in the right direction.
  
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hostops@sh.itjust.works ⁨10⁩ ⁨months⁩ ago
www.simplify3d.com/…/lines-on-the-side-of-print/

Or maybe this:

www.simplify3d.com/resources/…/blobs-and-zits/

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- root@lemmy.world ⁨10⁩ ⁨months⁩ ago
  Thank you!
  
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chris@l.roofo.cc ⁨10⁩ ⁨months⁩ ago
I had very bad lines because my print head carriage was lose. Just check if alle the axes are tight.

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- wjrii@kbin.social ⁨10⁩ ⁨months⁩ ago
  I actually had a slightly different issue. Having an Ender clone of dubious provenance, I needed to let just the tiniest amount of slack into the Z-coupler so the screw wouldn't bind and cause banding. It's the carriage arms that should provide lateral stability for the Z axis.
  
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Toes@ani.social ⁨10⁩ ⁨months⁩ ago
Might need to add a cooler to the nozzle

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tagginator@utter.online [bot] ⁨10⁩ ⁨months⁩ ago
New Lemmy Post: Lines in prints (https://lemmy.world/post/10611049)
Tagging: #3dprinting
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RustedSwitch@lemmy.world ⁨10⁩ ⁨months⁩ ago
I was having this problem, combined with a confusing bed adhesion issue. My gantry needed to be releveled.

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- root@lemmy.world ⁨10⁩ ⁨months⁩ ago
  Thank you, checking this now. I made a change I found on a video and made a new post here.
  
  How did you relevel your gantry? From what I see, you can loosen the two things I pointed to in my new post.
  
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  - RustedSwitch@lemmy.world ⁨10⁩ ⁨months⁩ ago
    I have a different printer; it was a pretty involved process that required partial disassembly. I imagine this is very printer specific.
    
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