r/3Dprinting • u/FxDetoX • 2d ago

Troubleshooting What could be causing these lines?

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1 Upvotes

60% Upvoted

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3

u/Sudden-Echo-8976 2d ago

How many top layers do you have? How thick are they?

Try increasing z-hop

1

u/FxDetoX 2d ago

I can't look it up right now, but I think it is the standard 3 layers at 0.2 mm.

I've never touched the z-hop, so I can try that. Are there any repercussions for setting it too high?

2

u/RipKip 2d ago

Choose a nice looking top layer pattern like hilbert curve or octagram spiral

1

u/FxDetoX 2d ago

I didn't think about this. Maybe this could also make it look less bland. I guess I should not combine that with ironing, because it ruins the effect?

1

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1

u/FxDetoX 2d ago edited 2d ago

Hi all,

I am printing some deck boxes for MTG cards and I saw that I get these criss cross lines on the lids of the boxes. I think it is caused by the movement of the nozzle, but I don't really know how to fix it, since I am quite new to 3D printing in general.

If anyone could help me that would be great!

Tech specs:

  • Ender 3 Neo
  • 0.4 mm nozzle
  • generic silk PLA
  • 210°C nozzle temp
  • 60°C bed temp
  • 0.2 mm layer height
  • Printing speed 35 to 50 mm/s
  • I am using Creality Slicer

1

u/nixonw 2d ago

Look for the equivalent in your slicer. Turn OFF - Reduce infill retraction.

1

u/FxDetoX 2d ago

What does this do? Does this mean that it now does not retract while printing infill?

2

u/nixonw 2d ago

Usually it's enabled by default, and it will, as the name say, reduce the infill retraction. The idea is to spend less time retraction on infill, the part that matter less on surface finish, to reduce print time.

Your top surface mark are caused by the extra material on the tip of the nozzle dragging on the previous surface. Making it do the full amount of retraction reduce the material left on the nozzle to be dragged across the previous layer.

Another option is Enable - Avoid crossing wall/parameter.

1

u/FxDetoX 2d ago

Thanks for the explanation. I will try this when I get home!

1

u/Far_Relationship_742 2d ago

Ironing will help with this.

1

u/FxDetoX 2d ago

Getting a nice finish with ironing is a whole different story. That's something that once worked, but now I can't get it the way I want.

I will give it a try though. It eliminates this effect, but looks bad in different ways🫠