How to overcome triangles on top layer?

Style · 2017-11-13T07:42:02.000Z

Hi folks,

So I’m trying to print this box, however when I print it there are triangles on the top layers that I just don’t want to see, and I have no idea how to fix it.

Here is an example of it in Cura:

triangles.png719×759 417 KB

And printed:

image_01.png957×896 134 KB

Does anyone know how can this be fixed?

(I attached the .stl file - box.stl)

wirlybird · 2017-11-13T12:11:44.000Z

If you mean the “chevron” looking surface I think that indicates the top surface is not flat but has a slope to it.

I can look at the STL this evening to see what may be up.

Perry_1 · 2017-11-13T21:19:55.000Z

@wirlybird hit it on the head. Its due to slopes. You can get less stepping by lowering the layer height, for example from .3 to .1.
In Simplify3d, you could run different processes, so you could print up to that area in a larger layer height, and then just do that area in a lower layer height.

gaehl · 2017-11-14T01:26:01.000Z

Change the model? The “triangles” are there because that’s where it changes layer height.

The bottom surface is curved and not flat it looks a bit of a pain to print cleanly.

gaehl · 2017-11-14T01:26:57.000Z

That’s also the bottom of the print, the square pattern appears to be the support/raft.

AS3Dprint · 2017-11-14T01:27:46.000Z

That’s the stepping of the layers. If this is your model make sure the top surface is flat. You can try to orient this as flat as possible but the surface is convex not flat.

Daniel_71 · 2017-11-14T02:11:06.000Z

The surface is not flat sloping away from center line, this causes the particular pattern of triangles

To remove means to flatten that surface, not “Lay Flat”

You will need to either extrude the surface then clip flat or find a comfortable cross section and cut it

Please see attached file
box_0_flattened.stl (3.32 MB)

3drapidprints · 2017-11-16T02:36:10.000Z

You can also lower the layer height which will make them less noticeable.

Style · 2017-11-17T09:52:55.000Z

Hi Daniel, really appreciate what you did here, thank you!

Can I ask from you to keep the rectangle (marked in Red) and also to keep the angles on the sides (marked in Green)?

Many thanks!

1_23.jpg1604×1408 301 KB

Daniel_71 · 2017-11-17T13:43:55.000Z

OK Let me get that done … I’ll attach it shortly

Style · 2017-11-19T07:59:16.000Z

Thanks, looking forward to it!

Style · 2017-11-26T06:21:09.000Z

Hi Daniel, any update mate?

Style · 2017-12-06T12:10:51.000Z

Hi Daniel,

Is there any update? I would really appreciate it.

Thank you!

How to overcome triangles on top layer?

How to overcome triangles on top layer?

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