Fr Robert Just watched the KH 241 on Youtube One thing I notice is that ALL your 3D designs d...

[G+_Bernard Bout]

Fr. Robert. Just watched the KH 241 on Youtube. One thing I notice is that ALL your 3D designs done on Thingiverse have "faceted" edges wherever there are round/circular parts. For instance the cover shown below has the circular edge clearly faceted.

 

Surely you know about the hundreds of "Shape Generators" available on Tinkercad?

 

For instance I show below the standard tinkercad cylinder that you use (Orange) and the Shape Generated cylinder (Blue). Notice the difference. Smooth curves instead of faceted. Even prints smoother. And your design with the faceted curve outlined below.

 

Hopefully you will use these in your future designs.

 

Have a great time in Berlin.

 

By the way you mention the "Helper files" - where are they? They are not on youtube nor on the Twit KH page.

[G+_Eddie Foy]

I do believe that the facets are a product of converting to STLs. I don't think you can make true circle with just triangles.

[G+_James Hughes]

Might be a resolution issue. I have no problem making smooth circular shapes. Could also be a tinkercad limitation. I use fusion 360 (both are Autodesk products).

[G+_Bernard Bout]

Eddy - The 2nd image I posted above is a model on tinkercad BEFORE exporting to STL. In the video you can clearly see the facets of the above part exactly as in the sample above.

 

Sure you can, almost. If the triangles are small enough then together they will appear to be a smooth circle and will certainly print that way. Anyway ALL graphic programs use straight lines to draw a circle.

In all CAD apps you can draw a circle and specify how many "sides" it will have. The more sides = smoother cylinder = longer slicing time = smoother cylinder when printed.

[G+_Bernard Bout]

James Hughes.This is not a Tinkercad limitation. I posted a smooth cylinder done in tinkercad above - the blue cylinder

[G+_James Hughes]

Bernard Bout? then I guess it's a resolution or settings issue. I noticed it too.

[G+_Bernard Bout]

James Hughes

The native Thingiverse primitives use low poly -> faceted cylinders.Like the default number of sides in Sketchup is 12 for a circle. At that res. you get similar blocky edges. I guess this is for people just starting out in modeling. But Thingiverse also has Custom Shape Generators, literally hundreds of them, as well as community written ones. To avoid the low poly blocky edges you pick one of these instead of the bog standard ones. Then you get much smoother curves. The blue cylinder has 100 sides, the orange is the default primitive.

Not only do the blocky edges look bad but where they will be printed large like in this KH project, this round object with square sides is supposed to fit on a proper cylinder and be waterproof which it cannot.