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profepaco

I just want a round cylinder

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After trying tinkercad and sketchup, if I design cylinder it is not well rounded and after printing it it looks horrible. You can see the faces of the polygons used to create the circle.

Could you please recommend me a CAD software where I can select the number of polygons for a cylinder, or at least the default value is good enough to have a rounded one?

Thanks in advance.

 

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I think must CAD programs will represent a cylinder as a mathematical cylinder. The issue is I believe that STLs are polygon based so the object in the CAD program has to undergo tessellation resulting in the surfaces you see.

DesignSpark Mechanical lets you control the surface generation was you "Save as STL". Look for similar options in other programs.

The unavoidable issue is that the more surfaces you use to get a smoother look, the longer Cura takes to slice the object

 

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I have increased wall thickness and the result is the same.

BTW, the ugly wall is visible in the inside face as well. :-| :-|

 

See the topic I linked, might be related to a bug in the latest official Cura

 

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20x20 cylinders printed on a UM1 generated out of DesignSpark Mechanical.....

 

One has twice the number of faces as the other but I can't tell which. I think I'm at the limit of the UM1's resolution.

 

Cura 14.04-RC1

Layer 0.1mm

Shell 0.8

Bottom/Top .6

Fill: 0

Speed 50

 

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I found previous version in my computer....

2 hours and 43minutes printing time with previous version

7 hours with latest version...

the same model, of course...and same settings...

We need a solution!!!

I going to print with old version... more tomorrow.

 

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They were sliced with Cura 14.04-RC1. I did notice that there is a significant seam on the inside but they were solid so Cura may have did something such that it didn't attempt to create an internal finished surface.

Looks like you can get older versions here : http://software.ultimaker.com/?show=all

The betas are closed but you can get them if you know were to look on the forums.

 

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So... a comparison

gallery_34293_830_112704.jpg

Left, last version of cura, 7 hours...right previous version, less than 3 hours.

I imagine the amount of people thinking the their printer is faulty.... and the problem is Cura...

Circles on the bottom, right part, duo to playing with settings.

 

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