Sketch Arc is Preventing Square Sketch from Resizing

[oo7_golden_1]

Hello 360 community! I am seeking some creative advice.

I am trying to create an adjustable model based off of a Fibonacci spiral. Yesterday I drew up a quick sketch of a Fibonacci spiral, tested it to make sure that it was constrained and adjustable and everything seemed to work as expected. Today I started building it again (yesterday was a sort of test run) and I cannot seem to get all of my arcs to work correctly.

The model is fully constrained as it should be, but when I adjust my initial square’s size (which I built the sketch off of) Fusion errors and tells me to check pretty much everything in the model.

After some deleting to try and pinpoint the issue, I believe I have narrowed it down to some Arcs causing the problem.

Its strange because some arcs work and some do not. I have uploaded the model to demonstrate.

If you find the smallest square in the center of the sketch and adjust its dimensional value (d1) every other square should also adjust accordingly.

As you can see the arcs SHOULD also adjust accordingly. The empty squares should allow similar arcs but if I add arcs to those squares the arcs ARE constrained but they prevent d1 from being adjusted.

I tried using a fit point spline instead of arcs but the spline does not stay within the squares, and sometimes doesn’t seem to render properly and I need the model to be precise.

Does anyone have any creative advice on how I can build this properly? Or on why I cannot seem to add arcs to the squares in question without the arc causing resizing problems later on down the road?

[TheCADWhisperer · Accepted solution]

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@oo7_golden_1 wrote:

Does anyone have any creative advice on how I can build this properly?

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Only 1 dimension is required.

The rest is all geometry.

See Attached.  Use the least computationally expensive constraints. (Get lazy - keep it simple for  you and for the computer.)

BTW - you are posting in the area of the forum to report bugs (if you read the forum descriptions).

Design issues should be posted >>over here<<.

[oo7_golden_1]

Thank you for the reply CADWhisperer. I did not realize I had posted in the wrong forum section. Usually I am more careful about such things. An honest mistake. 
I am not sure that I fully understand your advice about the spiral. I see the images but apart from creating a parameter of 2 mm for D1 on the first square... how would you set up the other squares to resize properly? Are you setting it up in the model parameters or the user parameters and how are you doing it? Would this fix the arc issue?

[TrippyLighting]

Please do not double post!

[TheCADWhisperer]

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@oo7_golden_1 wrote:

I am not sure that I fully understand your advice about the spiral. I see the images…

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@oo7_golden_1 

Did you examine the file that I Attached?

[oo7_golden_1]

Sorry @TheCADWhisperer,

I saw your images but I overlooked the file that you uploaded for me. I think my brain thought it was my original file being included in the reply (I overlooked the "Whisper" part of the file name). So, I apologize for overlooking it because you took the time to create it for my benefit and I did not even look at it because of my own misunderstanding. I have downloaded it and I do have some questions.

I am going to mark this thread as solved, upload your included file to the other thread (in the proper forum) and continue there so that I am not double posting and there is no confusion.