Need help with parametric sketch design

[Anonymous]

Hi All, I need some help here. What is the best way to sketch a board on the attached image.

https://mtmwood.com/en/?route=product/product&product_id=1542

Is there any way to setup a pattern like this? Can it be parametric?

Any help/ideas are appreciated.

[etfrench]

User parameters and dimensions will get you there.  Start with the center square.  Add each row to the center square using formulas in user parameters to make the width and length of each individual piece relative to a base value.

For example: The width of the narrow pieces are equal as well as the width of the wider pieces.  The length of each piece is the length of the piece inside it plus the width of a narrow piece plus the width of a wide piece.

It would be more interesting to make this design with arcs instead of straight pieces 😀

[janus2]

Why do you want to draw this pattern? Just as an exercise, then it's OK.

Otherwise the original is composed of many individual parts. The sketch or a 3D model derived from it won't help you much.

Hello ???!

About your sketch. Watch the Video: All narrow and wide parts have the same distance/size. You don't have to calculate much.
Define two parameters: Narrow and Wide. That should do it.

Start with a square. Then use the offset function. Always two lines at one corner for one direction with the value 'Wide' and then two lines for the other direction with the value 'Narrow' . It's a matter of a few minutes.

And everything is parametric!

Jan

[Anonymous]

There is no link to the video. Could you add the link please?

[janus2]

The Video:

https://youtu.be/0K98U_v6PMo

[Anonymous]

Thank you. What is unclear to me is how i would generate a pattern. I do not not want to define each rectangle separately.. I want to be able to define the number of rectangles and rules (formulas) for each rectangle.

Can it be done?

[Anonymous]

I do not see how i can create different offsets (Narrow/Wide) for the same operation. What am i missing? 

[chrisplyler]

With the rectangle tool.

Oh, you want more info than that? Okay.

Are you familiar enough with F360 that you can look into a sketch, examine each dimension, and understand the logic behind it? If so, please open the file I've attached at the bottom of this post. I only set up four inner rings, just to keep from wasting more time on an example for you, but you should get the idea.

I just made one sketch, in the upper hierarchy of the model, before creating any other components. I designed it such that I can easily change the thickness/spacing/position of the four rings within the board. It took me a bit of thinking to work out how to set up the center_offset to work as I desired. It took me even more thinking to set up the two spacing formulae (one for the narrow spacing and a slightly different one for the wide spacing. Can you figure out how they work, and what the tiny difference is between them?

After the sketch was completed and working properly, then I made the components. I assumed you would miter and join each strip, so made every one of them a separate component. Nested them into assemblies logically as I progressed. It looks like a loooooooooong timeline, but really it's just the one sketch, followed by a lot of Create-New-Component and Extrude commands. That's really the easy part. A bit time consuming, but easy. The only hard part is figuring out the sketch. Each component is just an extrusion from one bit of that sketch. Not complicated at all.

The final product looks like this:

Screencast will be displayed here after you click Post.

acc2d55b-eb42-45c1-9ae3-53f5c3773040

https://knowledge.autodesk.com/community/screencast/acc2d55b-eb42-45c1-9ae3-53f5c3773040

File attached below...