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How to add enforcing structure

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Hi everybody,

I'm a newbie but also happy new ultimaker-owner and was already able to successfully print my first things.

I'm most interested into designing and printing of 3D models of head's and hands most used for scale modelplanes-pilots. I was already able to generate 3D models of heads of my club colleagues out of 2D fotographs.

Now printing is difficult because of the missing inner enforcing "walls" or structure.

The outer shelf seems to be to fragile.

How and where (which SW) can this inner structure be added to the 3D model? Is there already a function in some standard SW availlable to add this structure? (what's the name for this structure?)

I do have netfabb or Cura availlable but up to now I have printed only with Cura.

Somebody there to help me?



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I am relatively new to all this myself.

But we have a common interest.

I'm still waiting on my ultimaker.

I'm guessing that your problem is in the model itself.

It's not waterproof.

I've done what you have with 123 catch. To generate

3d out of 2d images.

Try to Google meshmixer.

Hope this helps.

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Good to know I'n not the only beginner ;)

In the attachment you can see the structure I'm talking about.


No idea what the technical matching expression is for that. The inner little walls are keeping the outer shell in form. How can this little walls be generated. Is there a simply function in a program or do they have to be designed in a CAD program one by one?



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That's called a "sparse infill" you shouldn't be needing anything special for that, as the software generates those lines for you inside of solid sections.

So what you need is a solid model. What you see in the photo is just a solid cylinder from a CAD tool. (without the top printed)

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Hi Daid,

Thanks for that info. So we are comming closer.

I have opened my first printed Thing (calobration cylinder) to show the structure.

I have generated a 3D model with faceworx and tried to print this. Putting the head with it's back on the table, the printer has started successfully to print. After about the half (about 8cm in diameter), the thin shelf without this sparse infill, was to weak to resist to the forces generated by the extruder and I was forced to stop the process.

Now how can this sparse infill be generated and added to the sliced data?

What I have seen in the above shown cylinder is that the sparse infill is to dense for the 3D-head I have.

It would be enough if only 1/4 or even less of this infills would be generated. Is it possible to steer this also?

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in cura, you can see the 3D Modell after slicing how the printhead will move and create the infill.

So, you can test without real printing.

The infill can be adjusted by a % value and a Pattern (lines or hexagons ect.).

Your 3D Geometry must be solid. The Wallthikness will adust the shells.

The lower and upper Layers will be always "solid".

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