Minimum recommended thickness values for walls in your design.

[Anonymous]

Hi,

I am new to fusion 360 and designing in general, so any advice would be appreciated.

I designed a replacement part for a vaccum and I am unable to print a sharp edge since it tells me the wall thickness need to be 0.7mm. I tried to change the chamfer but when I do this, it's not sharp any more! I am sure their's a better way to do this.

[Oceanconcepts]

Where are you getting this message- from Fusion? If you are talking about 3D printing, there may be practical limitations on how sharp an edge can be, and the software is telling you that. 

[Anonymous]

yes, sorry for not being clear, the problem is not with fusion 360 itself, but when I try to print the object with the ''.stl'' I upload on shapeways.com and it tells me it can not be printed because of the wall thickness, so I want to go back to fusion to correct this. I went back on fusion but the only thing I'm capable of doing (with my limited knowledge of the software and how I've built the piece) is to make it like shown on the picture above, where it's not a sharp edge any more.

any way to go around this?  how do you design to print sharp edges?

[Anonymous]

the first picture is the result I achieve with fusion 360 after making the edge 0.7mm

the second picture is the one from shapeways after uploading my .stl   showing the edge where the wall thickness is a problem

[Anonymous]

bump

[Oceanconcepts · Accepted solution]

What I think Shapeways is telling you is the limitations of a successful print using their machine.  What they are saying is that they can’t successfully print such a sharp edge. In Fusion, you can gain a thicker edge by trimming it back as you have done, or by using the push-pull tool in the model environment to create a fillet, which would give you a rounded edge. Or maybe make a sketch of the top (assuming it’s flat) and extrude- join the extra .7mm if that additional thickness would be acceptable.  If that will work for your application, great. If you require a sharp edge on the part, then probably it would need to be machined or possibly molded, or 3D printed with a higher resolution process. You’re doing fine designing a sharp edge in Fusion, it’s just that the fabrication technology can’t handle that sort of feature. 

[Anonymous]

Thank you for your answer, everything make sens and I will try the above.