Is Joints the right method for WhatIF modelling

[stephen.greensides]

Please excuse the question, but a newbie to CAD, etc.

I am trying to model some stairs and have each step as 2 components.  The aim is to be able to change the size / shape / thickness / position and have everything re-calculate like a spreadsheet. BUT..

I joint a tread edge to the edge of its riser and move one and the other does not move.

I put it back and extrude a face and it goes through the jointed component instead of moving it.

Obviously I am missing something, but what.

Searching the Fusion 360 forum for joint tutorials shows how easy it is, but it is not working for me.

Can someone help, please?

Thanks

Steve

[davebYYPCU]

Probably not,

Combination of basic sketch and parameters, then rectangular modelling pattern, of the two components, would be my workflow, 

based on - I can’t see what you are doing,

[stephen.greensides]

Apologies, in trying to keep it short and to the point, I left out that I am trying to squeeze a toilet underneath and leave clearance between the stairs and the supporting steel above.  SO, we want to be able to see the effects of re-sizing the treads and/or risers and their position.

I have modelled them in 3D to include the possibilities of changing any dimension.  But so far making any changes with  rigid joints applied to joining edges does nothing.  Any movement or re-sizing does not affect the other components and it must be possible for the rest of the model to change according to any resizing of a single component, BUT HOW?

Thanks

Steve

[davebYYPCU]

A basic layout sketch, triangle, should get you there,

You know the height between floors, maybe, divide with the number of steps for riser size

you know the lateral distance to cover, maybe, divide by number of steps for tread size, 

you can work out the ramp angle from those two parameters.

Make changes and see how it works out.

[stephen.greensides]

Thanks,

I did not mention that the builder left us with the floors to finish, so we have a degree of latitude over both end points of the stair and we wanted to model the options (hence the WhatIF in the title) without having to redraw it each and every time.

I thought that we could increase the top floor height and the risers would increase accordingly.  Or that we could move the edge out and the stair would move as well or re-size to keep the other end point.

Or is this not possible?

Thanks

Steve

[davebYYPCU]

Yep all that is possible, has to be set up right, 

Disregard thickness for a minute,   

Riser height equals floor distance divided by number of steps

plug numbers into any of that and it should update for you, 

same for the floor coverage, and tread size.

When that is sorted, the components, will follow the layout sketch.

I am not back to a Desktop to make an example file, until Monday.

[stephen.greensides]

Example file would be appreciated

Thanks

Steve

[davebYYPCU]

Change to Count, Height or Distance  Parameters, will update the sketch, 

My pattern has to be manually updated, Patterns don't (yet) accept driven dimensions, so the trick is to edit the pattern, and for distance use the drop down menu, click Measure, and select the highlighted line again.  Cluncky but I have forgotten my School Trigonometry.