I am experiencing an unpredicted, erroneous behaviour in the attached part.
The rotor is composed of cylinder and a solid lofted between two 3D profiles. The attached part file is correct. To reproduce the error- change the "inlet_width" parameter from 12mm to 10mm or less (it is a parameter in "Blade Profile" sketch). On updating the part there will be infinitesimally thin solid layer on outer diameter of the cylinder.
Some features which need explaining:
-3D Sketch profile is a projection not from the "Blade Profile" sketch, but from a plane offset from it. This was first attempt at a fix. I suspected the original tangent work plane to intersect the cylinder.
-Creating a new solid body from loft was the only way to avoid errors such as "non-manifold solid".
I will be creating multiple versions of this part and I need to be able to safely adjust the "inlet_width" and "outlet_width" parameters. I will be grateful of any proposed fixes/workarounds to that glitched behaviour.
EDIT: The version is Inventor 2014 Educational.
Solved! Go to Solution.
Solved by JDMather. Go to Solution.
Solved by mta08pg. Go to Solution.
I have created a workaround:
One of the 3D sketches is now projected not on face of the cylinder, but a cylindrical work surface offset from it.
Still, I hope to learn if the error I encountered earlier could be predicted and if so- what is the best way to prevent it.
I would create the part differently.
It worries me when I see things like Work Axis1 that is a duplication of the Origin Y axis. Why would someone do that?
I would probably model the vane such that it was larger and then trimmed back.
I didn't spend a lot of time looking at this, but if possible, I would model the vane as a lofted surface and then Thicken and trim.
Another way you could do this is to do the Loft first then the Extrude - Intersect the outer cylinder.
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