Enable UCS in iPart & iAssembly for Use in Assembly Constraints

[v_zanetti_duea]

In Inventor 2025, it would be extremely useful to enable the definition and use of User Coordinate Systems (UCS) directly within iPart and iAssembly tables, so that they can be referenced in the Constraint Group during assembly – exactly as we can do with standard parts and assemblies.

This would greatly improve workflow efficiency, especially for users working with pre-positioned skeletons or multi-configuration design strategies.

Currently, the lack of UCS availability in iPart/iAssembly makes it difficult to apply parametric and consistent constraints across different member variants.

Benefits:

• Significant time saving in complex assemblies

• Enhanced automation and flexibility in parametric design

• Better integration with Skeleton Modeling workflows

• Simplifies constraint logic and reduces user error

Please consider adding this functionality to future versions of Inventor!

[andrea_pinato]

More over: please make ipart works with surfaces based models.

Example: let be this ipart

there is a surface leaded by the family table. As single ipart works fine, and if i switch default rows surface dimensions (parameters) changes accordingly to table

Then: try positioning that ipart into an assembly.
Guess what: no warning, no error message, but geometry is completely blank:

Ironically you can even change family table member

but still wiped out geometry

So, please Autodesk, finish what you have started: iparts based on surfaces could be very useful.

[gilsdorf_e]

I have posted this in https://forums.autodesk.com/t5/inventor-ideas/ucs-in-iparts/idi-p/8782977?search-action-id=116004956... before. Please vote there as well, as this is at +33 already.