Measured value as a variable

stephane_leveel

Hi, I am both a SW and ProE user and am now looking at Onshape.
For my CAD needs, I need to use some of the measurements like volume, inertia, distances as input to calculations that drive the model.
I can then use an optimizer or a goal-seek to drive the model.

This is possible in ProE but not in SW.

It looks like Onshape is following the SW approach.
Will Onshape offer similar features to ProE?
If not, is it something I could build using Featurescript?

Thanks 

konstantin_shiriazdanov

This FS has only measuring functionality which is provided by functions, implemented in standard library, sadly there are no function to calculate moments of inertia.

owen_sparks

Hi and welcome.
There is a great existing featurescript that will measure various parameters and store them in variables that you can then use downstream in your feature tree. @konstantin_shiriazdanov was this yours? The names "measure distance" and "measure extended" ring a bell but I'm not sure what the latest and greatest version is called or what it can and can't measure.

Also with the owners of ProE buying Onshape, and the existing SOLIDWORKS talent involved, I'm convinced the future of Onshape's methods will be a mixture of the best bits of other systems and some special sauce of their own design...
Cheers Owen.

konstantin_shiriazdanov

here is the FS you looking for - https://cad.onshape.com/documents/77baa8153589a7fc5f289829/w/cffd0f2a7077380d5378a885/e/d3174bf5315e6aafcb889367

stephane_leveel

Thanks for the quick reply ! This looks like what I would be looking for. 

stephane_leveel

Thanks for the quick reply ! This looks like what I would be looking for. 

stephane_leveel

This is a partial yes since it looks like second moment of inertia is not a value available. I might be able to do a work-around using the mass mome t of inertia.

konstantin_shiriazdanov

This FS has only measuring functionality which is provided by functions, implemented in standard library, sadly there are no function to calculate moments of inertia.

ilya_baran

@konstantin_shiriazdanov

evApproximateMassProperties will give you moments of inertia.

rune_thorsen229

konstantin_shiriazdanov said:

here is the FS you looking for - https://cad.onshape.com/documents/77baa8153589a7fc5f289829/w/cffd0f2a7077380d5378a885/e/d3174bf5315e6aafcb889367

konstantin_shiriazdanov, is there any way the obtained variable&value can be used in another partstudio or assembly?
It would be great if you could add the following functionality: changing the name of the variable should propagate

Jake_Rosenfeld

@rune_thorsen229

Unfortunately we do not have a concept of a "global variable" that is accessible in the whole document.  Lot's of people have asked for it, and you can help by adding your vote here: https://forum.onshape.com/discussion/4027/global-variables/p1

There is nothing Konstantin can do about the name change not propagating.  The code he has control over is local to just that one feature, it cannot reach out and change the inputs to other features.  Variable name refactoring like this is something that we have on our radar, because it does cause a lot of frustration for our users. You can vote for that too: https://forum.onshape.com/discussion/5871/cascade-variable-name-changes-to-instances-of-its-use

rune_thorsen229

Jake_Rosenfeld  Beautiful and clear answer, thanks.

john_mcclary

rune_thorsen229 said:

konstantin_shiriazdanov said:

here is the FS you looking for - https://cad.onshape.com/documents/77baa8153589a7fc5f289829/w/cffd0f2a7077380d5378a885/e/d3174bf5315e6aafcb889367

konstantin_shiriazdanov, is there any way the obtained variable&value can be used in another partstudio or assembly?
It would be great if you could add the following functionality: changing the name of the variable should propagate

You could derive your part into other studios, then use konstantain's measure value featurescirpt to re-create the variables off the derived geometry.