Assembly to Part

[JD Mather]

Originally Posted by Zoheb N

What I am trying to do is:

One of my teachers at school said he would print it out as a 3D model, but the 3D model printer only takes Inventor part files

That is a much better problem statement.
Here is the solution.
Start a new part file (ipt). Exit sketch. Select Derived Component and then select the assembly (iam) file to derive. This will combine all your assembly into one part. (Notice that you could also use this method to cut one or more parts from another.)
Save As the derived ipt as STL (or ipt if that is what your teacher wants, but I am not familiar with a 3D model printer that takes Inventor files directly. What machine are you using?)

In Inventor 11 DWF Extension these extra steps aren't required as STL files can be created directly in iam.