topic Re: I cannot Close Loop to obtain a profile when using sketch blocks in Inventor Forum

I cannot Close Loop to obtain a profile when using sketch blocks

cyberider — Fri, 31 Aug 2018 04:45:03 GMT

Why?

Right-clicking and using the "Close Loop" command will NOT let me select the sketch blocks.

Re: I cannot Close Loop to obtain a profile when using sketch blocks

torbjorn_heglum1 — Fri, 31 Aug 2018 07:44:06 GMT

Still there in IN2019...

Old annoying bug - it seems that a part of a sketch block cannot be part of a region. A region must be fully enclosed by either a sketch block, or only geometry created in the sketch.

To get around this you need to trace the ekstra geometry on top of the sketch block to close the region. (Yes, double lines ) Here you need to be careful so the end points are coincident to sketch geometry not to the block, if not the region still isn't valid.

Torbjørn

Inventor 2017.4

Re: I cannot Close Loop to obtain a profile when using sketch blocks

Marco.Takx — Fri, 31 Aug 2018 11:36:47 GMT

Hi @cyberider,

Like @torbjorn_heglum1 said it's an annoying bug.

You have created those rectangles and Circles within a Sketch Block.

You connected it with lines.

At this moment Inventor doesn't see a closed loop between the lines and the sketch blocks.

Or you connect the end points with a arc (For the circles).
Or explode the sketch block and Split the circle. (Than it isn't a sketch Block anymore)

If my post answers your question Please use .Accept as Solution & Kudos This helps everyone find answers more quickly!

Re: I cannot Close Loop to obtain a profile when using sketch blocks

cyberider — Fri, 31 Aug 2018 17:37:58 GMT

How is this a solution if it is a bug?
How can this be a bug when this is extremely basic? This is not an edge case, this is an extremely popular use case.
How can this even be a bug? This means that there is no test coverage of inventor code. If this can be a bug, then Inventor is full of bugs and always will be.
I am using sketch blocks a lot, because all Inventor users should. But now we are expected to go to each and every sketch block we use in a sketch and manually by hand create new, overlapping curves to deal with this bug that should not be a bug in the first place?

Re: I cannot Close Loop to obtain a profile when using sketch blocks

johnsonshiue — Sat, 01 Sep 2018 02:41:52 GMT

Hi! Yes, this is a very annoying behavior, I agree. Inventor sketch profile recognition is constraint based, not geometry based. Currently, the behavior is indeed a limitation. We are aware of the deficiency and we are working on a solution for future releases.

Many thank!

Re: I cannot Close Loop to obtain a profile when using sketch blocks

cyberider — Sat, 01 Sep 2018 18:17:46 GMT

Hi Johnson, you say "Inventor sketch profile recognition is constraint based, not geometry based."

However all the curves in my examples are constrained to each other. It is a closed profile loop but Inventor doesn't recognize it as a closed loop and will not let you use the Closed Loop tool to force itself to recognize all the constrained curves as a closed loop.

Re: I cannot Close Loop to obtain a profile when using sketch blocks

johnsonshiue — Tue, 04 Sep 2018 15:08:30 GMT

Hi! When there are blocks in a sketch, the entire block is considered a rigid set. Although the additional geometry forms a closed loop, Inventor still does not recognize it unfortunately. I am using your case to test our new profile solution. I will let you know what I find.

Many thanks!

Re: I cannot Close Loop to obtain a profile when using sketch blocks

johnsonshiue — Tue, 04 Sep 2018 18:32:42 GMT

Hi! I try this particular case using our internal sketch profile build. The profiles are properly recognized. Unfortunately, the ability to do that is limited to future release, the the existing releases.

Many thanks!