Designed parametric components - best workflow for building connector to arrange?

Designed parametric components - best workflow for building connector to arrange?

kierenj
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Message 1 of 12

Designed parametric components - best workflow for building connector to arrange?

kierenj
Explorer
Explorer

This is a workflow kind of question. I've created a mount for a motor with a flywheel on the end, a base for that mount, and a linear servo component. I've used parameteric design wherever possible (with the exception of using the servo component, which I imported from somewhere online).

 

I'm now trying to design another component to position them correctly. My plan is to draw some alignment holes on a sketch, and I can dimension the distance between them to align the components. That handles the "base" plane. I would then extrude that to cover all 3 axis, and add rigid joints to align everything.

 

But, the components need to be positioned at different heights. Because I have a hierarchy of parameteric components, I tried just creating a new parameter - by going through sketches and the timeline and adding various terms to the formula to get the correct height of each component, subtracting them to find the difference, etc.

 

However, I made some mistake in this process, and it's not surprising since it's really fiddly to go through that process.

 

Since all extrusions were parameteric, I was hoping I could use some tool to "measure" the total height of a component, and F360 could give me a formula. It doesn't look like that feature exists?

 

In lieu of that, is there another way to do this kind of design for an assembly? Just looking for a general approach.

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Message 2 of 12

g-andresen
Consultant
Consultant

Hi,

Without seeing the design in its context, it is not possible to give hints on how to proceed.
Please share the design.

günther

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Message 3 of 12

kierenj
Explorer
Explorer

Thank you for the reply.

 

How can I share my design?

 

Additionally - I'm not sure it's specific to this design? If you had a couple of fairly complex parameteric components as described, and needed to draw something to connect them (and you wanted the connector to be parametric too), is there not a general recommended approach?

 

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Message 4 of 12

TheCADWhisperer
Consultant
Consultant

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

(Or make a public link and attach the link here.)

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Message 5 of 12

kierenj
Explorer
Explorer

Here's a link - https://a360.co/33LutJd

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Message 6 of 12

chrisplyler
Mentor
Mentor

@kierenj wrote:

If you had a couple of fairly complex parameteric components as described, and needed to draw something to connect them (and you wanted the connector to be parametric too), is there not a general recommended approach?


 

If you just need an imaginary connector to keep two components separated some known distance...

 

1. You COULD just make a Rigid Joint between them, and enter [an] Offset value[s] into it (or parameters representing said Offset[s]).

 

2. You COULD make a separate Component containing just a sketch that defines the points and the distance between them. Call it a "positional control" sketch if you like. You could assign parameters for the distance and angle (or multiple X,Y values, or whatever you like) in that sketch. Then you can Joint your other components to points on that sketch.

 

 

 

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Message 7 of 12

kierenj
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Explorer

Thanks, but I do need a real printed component to join them, too.

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Message 8 of 12

kierenj
Explorer
Explorer

Hi, I shared the design, are you able to take a look please?

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Message 9 of 12

chrisplyler
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Mentor

@kierenj wrote:

Thanks, but I do need a real printed component to join them, too.


 

Fine. Then you can use THAT component instead of just a sketch. Same workflow applies.

 

If two components will be joined (mounted) onto a third, then the first two don't need a joint between them. They can just each have a joint to that third component.

 

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Message 10 of 12

kierenj
Explorer
Explorer

Hi, sorry, not sure I understand the workflow.

 

The connecting component is a "base", with supports poking up to meet the base of each of the other 2 components.

 

The components are different heights. They are both built parametrically, but working out the formula for the overall height of the components is tricky: they have lots of sub-components!

 

My approach was:

- Work out a formula for the height of component A

- Work out a formula for the height of component B

- Create a base beneath the taller component, and add supports from the base to the shorter one so it's at the correct height (let's say the tops of the components need to align). For that, I subtract the difference between the answers to the first two bullet points

 

But, the components are really quite complex. The first two bullet points above are difficult, error-prone steps.

 

What I'm asking is - is that the only way to do it?

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Message 11 of 12

chrisplyler
Mentor
Mentor

 

No that's not the only way to do it.

 

You could...for example...use Planar Joints to align all the tops of the components. Or...you could use a sketch on a plane with points to define their positions, such that you Joint each one to a sketch point by their tops sides, so all the tops of them lie on that plane.

 

Then you could Extrude each base post up "To Object" such that the posts will always be the right length, even if you change the height of the components, either together or individually.

 

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Message 12 of 12

chrisplyler
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Mentor
Accepted solution

 

Or define the top alignment height with a parameter, and joint the components to the base with that parameter as a height offset...

 

https://knowledge.autodesk.com/support/fusion-360/learn-explore/caas/screencast/Main/Details/eadbbb1...

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