Scale

[Rodrigo]

Hi! First, I want to congratulate you for Marilou, it's fantastic. I realy apreciate your colaboration with our obstacles.

I'm in the next situation. I want to modeling with Marilou, a robot whose dimentions are very small. Here is my problem . I need to work with 10 um (0,00001 [meters]) but Marilou accepts until 100 um (0,0001 [meters]).

My question is, Can I escalate one order all my robot? How can I do it?
Because, not only do I escalate their dimentions, but also mass...
I don't know how the inertia matrix will change, etc.

Can I escalate?...

Thank you very much for you colaboration!!!..
Salutations...

Rodrigo

[LR]

Thank you so much for the 'it's fantastic'

Well,

I need to work with 10 um (0,00001 [meters]) but Marilou accepts until 100 um (0,0001 [meters]).

It is not possible to work with these units because too mall .But, can't you 'multiply' by 1000 your unit for working around meter ? it is exactly the same ... it is just a scale factor ...

If you want to scale the entire PHX, Menu->PHX->Scale tool. (but i'm not sure it is what you need by now )

Thanks

[Rodrigo]

Hi, I've just seen this tool. It escalates dimentions and mass. But what happen with inertia matrix? because if I modify only their dimentions, the inertia matrix'll change.

I=Σ(mass*d²)

I want to preserve his physics parameters to create a simulation as real as possible.

For example, if I escalated their dimentions with this tool (multiplying by 100), what parameters would I have to change to preserve his physics parameters?

I don't know if I make myself clear.

Thanks.

[LR]

Well, when you scale the entities by using the Scale tool, you can also scale automatically the masses (change the required option in the dialog box).

For the inertia matrix, i think the result will be good because the inertia is computed from geoms lenths and masses interpreted like a density (by using the volume of the geometry). Try it, i think it will be good.