Spacing Object Parametrically

[Anonymous]

I'm building a bookshelf with tabbed shelves. Currently creating all the shelves, and then will make sides and subtract out the shelves for the slots. Have 2 different gap sizes that I want for the shleves, with 2 bottom shelves with X inches each, and 3 top shelves with Y inches each, which I want to keep as parameters. Move isn't in the timeline so I can't have the parameters there and adjust heights. I don't really know what joints I would use to achieve this as nothing is touching at this stage, I just have shelves floating in space.

Made into components, but don't really understand which joint is going to work.

 Essentially problem could be stated:

Have a [C]ube component. Want to know how to space to that I get

C ---> X <---C ---> X <---C ---> Y <---C ---> Y <---C ---> Y <--- C

And can later modify X and Y.

[robduarte]

If it were based on sketches then you could use the X and Y parameters as dimensions. Is that an option?

[Beyondforce]

Hi @Anonymous,

Could you please show us a picture of how the bookshelf is going to look like? That should be very easy to do, if you do a Top Down Design bookshelf assembly with In-place components.

Cheers / Ben
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[daniel_lyall]

That's easy as mud to make.

You make it with parameters you have a user paramater for each main dimension length, width and height, your length dimension is the extrude distances.

you set up a user dimension for your tab spacing in each direction you want them to go, you use this for the sides top, bottom and back as well, so they line up.

your back dimension is your width and height + how much you want to add

the shelf width is the width - your timber thickness *  2 - how much of the back you want sticking out. (use center rectangles for them it's way easier)

the shelf gap is a math function of height / shelf amount - timber thickness * 3 

It's also easier to have a gap and timber thickness user paramater

the tabs you have a user paramater like the shelf gap paramater

Now you have 2 courses you can go down one is how you are doing it know, you can run into problems doing it this way.

The other is to set up all your components first then do your user parameters doing most of the work based of a back sketch

It's doing a back to front assembly

you have the top, sides, A shelf, back and bottom sketch on the back sketch you add the back joints in there as well and the tabs for the back of the shelf, then you just activate a component as you go  extruding each part with it's component active

then you go back and add the tabs to the shelf (yes one Shelf you pattern it for the rest ) The tab holes and tabs you use a pattern to places them you use this parameter in the shelf's, tabs and tab holes (Tabs and tab hole are mortise and tenons).

I have done a few vids on this they are on my youtube channel.