BUG: Cannot resize drawing with lots of Symmetry constraints

[Smokeys]

I am posting an example.   I have a drawer bottom that I use lots of symmetry constraints so I can resize it and maintain even spacing.   But when I try and resize a dimension,  say change d2 to 10.5 from 11.  I get an error stating that I cannot change that dimension as it's already that size.    See the screenshots and also the attached fusion file.

This works just fine with a fewer number of symmetry constraints.

[wmhazzard]

I find that the symmetry constraint causes many problems and is very buggy. I would use mirror and or equal instead. I would also only sketch the minimum amount of rectangles and rectangular pattern the cuts, your sketch is needlessly overcomplicated.

Just today I used symmetry and the sketch would not show as fully constrained even though it was.  

[Smokeys]

I agree, been using Fusion for years and try to minimize the symmetry constraint.  I ran into similar issues using the rectangle pattern, it's not easy to resize either so we end up with the needlessly complicated drawing.   The rectangle tool puts in some hidden constraints that have driven me nuts in the past.

Now that I am paying $60 a month, I was hoping Fusion would fix this issue.

[davebYYPCU]

Sorry, thought you were a new user.

Not Fusion, it's a workflow issue.  Get out of the sketch as soon as possible.

My plate is purposefully oversize, but not your slots, edit the base parameter back to your size. (Not exactly the same as your sketch, but only to make the maths a bit easier.)

Might Help....

[TheCADWhisperer]

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@Smokeys wrote:

I agree, been using Fusion for years and try to minimize the symmetry constraint.  I ran into similar issues using the rectangle pattern, it's not easy to resize either so we end up with the needlessly complicated drawing.

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You have developed computationally expensive modeling techniques.

Pattern (symmetry is a type of pattern) Components, Bodies, Features or Faces rather than sketch elements.

(I can post a brief description of the logic if interested in understanding why it is preferable to pattern features rather than sketch elements.)

What you show and describe is not in the Drawing workspace.  Design or model is the correct term rather than drawing.  Drawing is 2D documentation of the 3D model.

If you have trouble using Feature Patterns rather than sketch duplication - I recommend Attaching more examples here for the experts to illustrate more computationally efficient techniques.

(Same issue as discussed 3 years ago... https://forums.autodesk.com/t5/fusion-360-support/fusion-stops-with-large-number-of-holes-in-rectang...)

Any time you find yourself repeating dimensions (or sketch elements) there is probably a more efficient technique.

[Smokeys]

Thanks for the solution.   One gets used to doing things a certain way..   My issue is that I tend to make a generic drawing and then resize it, thinking that the symmetry will keep it, well symmetrical.    What's the best way to approach that?

[TrippyLighting]

Works fine here.