topic Re: Insert constraint error when adding chamfers in Inventor Forum

Insert constraint error when adding chamfers

Christian3.14 — Tue, 10 Aug 2021 19:04:37 GMT

I use a lot of insert constraints in my assemblies. When I add a chamfer later on to the arcs the insert constraints use, errors pop up because the original arc isn't there anymore. Is there any way to add a chamfer where Inventor automatically adjusts to use the chamfered arc?

Re: Insert constraint error when adding chamfers

SharkDesign — Tue, 10 Aug 2021 19:17:27 GMT

The only way would be to use axial constraint and a planer mate on the main face.

The insert will always fail if you remove the geometry.

There might be a way to do it with joints.

I just tried a joint mate and that failed too.

Re: Insert constraint error when adding chamfers

mcgyvr — Tue, 10 Aug 2021 19:42:16 GMT

No way to have Inventor adjust. You just need to fix the broken constraints by selecting the new edge.

All edges/surfaces,etc... are assigned an internal name in Inventor behind the scenes... Constraints utilize that internal name for tracking.. When that edge goes away the constraint breaks as it can no longer find that internal name used to reference that edge as the edge is no longer part of the model definition.

Re: Insert constraint error when adding chamfers

ferrisb — Tue, 10 Aug 2021 23:30:57 GMT

As JD suggests, best to add the chambers before constrained.

If the chamfer is external, constrain insert to inside edge. If internal constrain to outside.

Removing the constrained edge or surface results in an error every time, maybe rethink your workflow, & good luck.

Alternatively, I have "made for constraint purposes" only extrusions, I.e. a .001 in +extrusion, doesn't usually show up in the drawing or affect mass.

Re: Insert constraint error when adding chamfers

SharkDesign — Wed, 11 Aug 2021 06:11:14 GMT

This is the only way to do it to be sure it won't break:

https://knowledge.autodesk.com/community/screencast/634e9ad9-27fa-4592-a383-5dc3dd4b75d9

Re: Insert constraint error when adding chamfers

gmarken — Wed, 11 Aug 2021 19:37:21 GMT

Sometimes it is easier to do concentric and distance, sure it is two steps but at least you don't have to go back and redo or correct mate errors.