Sketch gets unconstrained when deleting lines / dimensions

[Anonymous]

Hi, I was in Fusion today and I noticed, that when I delete a line or dimension in my sketch (which was fully constrained before), the whole sketch becomes blue, so unconstrained. If I further delete thing of the sketch, some parts or even the whole sketch get constrained again.  The strange thing is, that when the whole sketch gets unconstrained, I can`t move things, probably, because it is still constrained, and just marked as unconstrained. I think this is very annoying, because I usually want to have my sketches fully constrained, so I can make controlled changes in the timeline. Do you have any Idea how to fix this? I think it is a bug, but I don`t know how tell fusion I found a bug. I think it is a bug, because I restarted my computer, updated fusion and tried it in other sketches and always had the same problems. I hope you can tell me how to fix it, or how to report it to fusion, as I only have an educational license and can`t contact the support. 

Thanks!

[joseph.hoermann]

Greetings @Anonymous , 

Typically deleting dimensions has the potential to unconstrain sketch geometry. This article is decent at explaining Fully Constrained Sketches. Could you potentially generate a screencast for me to take a look at showing me the issue you are running into? Thank you so much.

[up201806660]

Is there a fix yet? I am having the same problem. If I delete, it goes under-constrained. If I control-Z, it's fine

[TrippyLighting]

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@up201806660 wrote:

Is there a fix yet? 

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Learn proper sketching 😉

Perhaps, attach your design in .f3d format so we can provide more detailed feedback!

[up201806660]

I am trying to learn but I am still a beginner.

Here's the sketch. There's also the line I am trying to delete.

Thank you in advance for the help.

[TheCADWhisperer]

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@up201806660 wrote:

I am trying to learn but I am still a beginner.

@up201806660 

Did you create this sketch or did someone else create the sketch.

The sketch is far more complicated than necessary.

Are you following instructions from some tutorial?

Would you like to learn how to do this correctly (warning - will require starting over from scratch and following my steps precisely)?

[up201806660]

Yes I did it by myself without following any tutorial.
First I split the sketch into multiple sub-sketches that made sense. But one person on discord told me to do like this. The problem I was having was about the parameters not going well with projections. Also situations where there are 2 solutions for the constrains.

Yes, I am willing to start over. It would just be like the 5th time xd. I really want to learn CAD

[TheCADWhisperer]

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@up201806660 wrote:
 I really want to learn CAD

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You are doing well for a beginner by using symmetry about the Origin and fully defining your sketches, but -

Don't duplicate sketch geometry (except in rare cases).

I see six duplications of the servos - don't do this.

The Servo is one component (sku number) ordered @ 6 instances from vendor.

The way you are modeling it is computationally equivalent to redesigning the same thing 6 times.  Design once!

Now you might have limited duplication for the purpose of visualizing the overall "big-picture" layout, but keep duplication to a minimum.

Start a new file.

Sketch only 1/4 and omit duplication of servo.

Attach the new file here with ONLY this 1/4 completed.

Here is example of my start...

I will not create anything outside of the upper left quadrant other than my initial construction rectangle. (unless there is some non-symmetrical geometry)

[up201806660]

Thank you very much for the help! I will give it a go 🙂