Turn a Hexagon into an Octagon using parameters does not work..

[NVNDO]

Hey everyone, 

I would say I have done everything right, but Fusion refuses to act accordingly. ?! 🤷‍♂️

 

When I change the side-count "Shape" from 6 to 8 - nothing happens..

 

These are those things I don't understand in fusion.

The functions are there, but they don't always work like expected.

Can anyone help solve this mystery?

[jeff_strater]

"When I change the side-count "Shape" from 6 to 8 - nothing happens.."

That is at least partly because you never reference "Shape" anywhere in your design.

However, even if you had tried to tie "Shape" to the sketch polygon, it would not have worked.  Sketch Polygon is just a geometry creation technique - it is not a parametric "feature" whose number of sides can be changed with a parameter.

There are certainly ways to do this, but they are probably pretty convoluted.

[davebYYPCU]

(Joking) Never heard Circular Pattern called that before. 

[NVNDO]

Oh, well.. I had it referenced prior to posting, but tried so many things that I might have gone one step back (too far).

Sorry for that - I should have checked before. 

EDIT: It was added. I just added "Shape" again, but it does not show - as if it was never referenced. IMO, This is a bug. 

In regards of @davebYYPCU Circular pattern, I was about to just make a triangle and circle it around 6 or 8 times, but the angle is not the same. Therefore I did not know how to proceed. 

I might make a triangle shape inside a circle, to that the circle drives the outer dimensions... Just theoretisizing. 

I'll keep on trying. 

[davebYYPCU]

Set the radial lines of the triangle, as 360 / count.

Might help…..

[jeff_strater · Accepted solution]

@NVNDO - I think your approach will work.  See the attached.  I created a triangle sketch, where the angle is 360/Shape:

Then, extruded that as a cut, and created a circular pattern, with Shape as the count:

It seems to work in limited testing, for, 5, 6, 7, 8

model attached

[NVNDO]

That is exactly what I was thinking of, but would have probably spend a day getting this to work.

Thank you sooooo much!!!! 4, 6, 8 is all I need to alter between. 

🙏

[NVNDO]

To make measurements accurate for my need, instead of measuring both lengths of the triangle (giving me the corner to corner length) I drew one discontinued line from the center to the mid point of the angled line. That way, when altering between shapes "Size" is always the length between flat and flat surface.

My theory, your skill @jeff_strater, and a little mod. Everything works like like a charm!