I have a pink arc.

[Anonymous]

Hi!
I am confused.

I have a pink arc.

Arc supposed to be green or blue.

Pink means dimension.

I don't understand why I have pink arc.

All ideas are appreciated.

The file is attached.

Thank you!

[JDMather]

The arc is "sick".

Edit Sketch1.

Turn on the Degrees of Freedom symbols.

Note that there is unconstrained geometry.  (line over top of line and unconstrained point at origin)

Manage>Rebuild All returns error information about the "sick" geometry in Sketch2.

But the reall key is to fix Sketch1 and not have extraneous geometry like this which serves no purpose (other than to kill later sketches).

[Anonymous]

@JDMather, Hi!

What do you mean saying

==But the reall key is to fix Sketch1 and not have extraneous geometry like this which serves no purpose (other than to kill later sketches).

How does it work in this case?

Thanks!

[JDMather]

The first sketch is not well constructed.

If you can't find the errors - I recommend that you start over and be very careful in your creation of geometry.

The errors that exist in Sketch1 should never exist in any sketch.  Sketching practice will resolve this problem.

[Anonymous]

You can edit sketch 1, then right mouse pick and select Sketch Doctor and run the Diagnose Sketch. Leave all the Dianotic Tests Checked. It will show you all the errors the sketch has.

Then do the same to sketch 2.

[Anonymous]

I don't have the proper version of inventor to open the file with, but I can say that this happened to me all the time when I'd modify previous sketches whose features later sketches used as projected geometry. Eventually I figured out that Inventor seems to catalogue the lines in a sketch. So if you extrude a square sketch and project the edges of the resulting solid onto a new sketch, then go back into the first sketch and delete one of the lines and recreate it, the projected geometry in your second sketch will fail....even though the modifications you've made result in the same extrude, that new edge must have a different ID from the first one or something and the projected geometry doesn't recognize it. Now I make sure not to delete when modifying an earlier sketch....I'll go through the extra work of breaking all the constraints so I can re-orient geometry instead.

[JDMather]

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@Anonymous wrote:

... but I can say that this happened to me all the time when I'd modify previous sketches ...

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This rarely happens to me.

I use the Origin CenterPoint as my single Datum when practical.

If I do use projected geometry I try to use only points (not lines).

If I do Project Geomtry on lines I try to use projections from sketches rather than part edges.

And keep all projections (other the the Origin Geometry) at a minimum.

It all has to do with parent/child history based relationships.

Especially when you know geometry might be changed - take extra care to the parent/child relationships that you build into the geometry.