Parametric Bisection at Standard Intervals

[jasonFUGEG]

Hello,

I have this awning design.  It's parametric so that you can specify the height, projection, number of bays, etc.

I'd like to be able to specify the number of stretchers going across the hypotenuses of the triangles.  Right now, I've specified one, so it's centered, but if I were to say two, I'd want them evenly spaced between the vertices.

I've been trying to think of a way to do this with a pattern, but I can't figure out a way to have it fully parametric.  All solutions require me going in and editing instances of a pattern or selecting which faces to extrude.

Is there a way to make this fully parametric?

Thanks,

Jason

[jhackney1972]

Please attach your model.  If you do not know how to attach your Fusion 360 model follow these easy steps. Open the model in Fusion 360, select the File menu, then Export and save as a F3D or F3Z file to your hard drive. Then use the Attachments section, of a forum post, to attach it.

[davebYYPCU]

Short answer is yes, 

the independent rails are spaced at length plus frame thickness, Count equals frames minus 1.

Might help....

[MichaelT_123]

Hi Mr JasonFUGEG,

Here is the very simplistic way ... how to do it.

Regards

MichelT

[jasonFUGEG]

Here's my test file.  Essentially I'd like to create a pattern but find a way to hide or remove the first and last instance of that pattern.  That's because those stretchers are already accounted for.  I know there's a way to suppress instances of a pattern, but I can't think of a way to suppress the first and last instance in a parametric way. 

[TrippyLighting]

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@jasonFUGEG wrote:

Is there a way to make this fully parametric?

That depends 😉

If you are only interested in creating the proper number of component instances, then that can likely be done, as you can use formulae and if-statements in formulae within user parameters to calculate the spacing and number of the needed component instances.

Usually, however, that isn't the end of a proper assembly. You'll need to assemble the components using one or more assembly joints.

In this case you'd likely use a rigid group joint. That unfortunately is NOT fully parametric, as much as that pains me to say! Every time the number of component instances changes, you'll have to manually edit the rigid group. If the new pattern has fewer instances that joint will return a warning message, because it misses previously selected instances.

If the number f instances increases, you'll have to edit the joint and add those instances to the selection.