Teuvo
This page describes how to check if your assemblies have interfering parts - which might lead to serious problems when manufacturing and assembling your design.
First of all, you need to have assembly containing at least 2 parts.
![](https://alliance.seas.upenn.edu/~medesign/wiki/uploads/Software/nm1.jpg)
Now mate your parts properly - make holes concentric and the top of the plate and bottom of the screw head coincident.
![](https://alliance.seas.upenn.edu/~medesign/wiki/uploads/Software/nm2.jpg)
Now push Interference Detection on the top tab. As you push it - your assembly is the preset assembly for the interference detection..
![](https://alliance.seas.upenn.edu/~medesign/wiki/uploads/Software/nm3.jpg)
..and you need to just push the Calculate button to see if there's an interference in your assembly! (Change other properties if needed).
Oops... this assembly has interference!
![](https://alliance.seas.upenn.edu/~medesign/wiki/uploads/Software/nm4.jpg)
Ok.. don't worry, it can be fixed! Just go to the interfering part (the rod is too big in diameter) and change the diameter to more suitable size!
![](https://alliance.seas.upenn.edu/~medesign/wiki/uploads/Software/nm5.jpg)
Looks like it fits.. but we have to check! So do the Interference detection and it looks like...
![](https://alliance.seas.upenn.edu/~medesign/wiki/uploads/Software/nm6.jpg)
Great!