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We need center of mass, moment of inertias and other mass properties via the inspect menu and the option for it to appear in the analysis folder like a section analysis. X, Y, and Z axis need to be displayed (visible) while viewing mass properties (also needed for the measure tool).
The ability to add any one mass property to a bill of materials/cut list column and use as parameters in equation is also useful.
It can't be overstated how essential this is for anoyne doing mechatronics.
It'd be really great to have the ability to export center of mass, moment of inertia tensors, and joints for assemblies.. maybe also to have a (good / reliable / numerically stable / physically accurate) rigid body dynamics simulation system built in with a sensor / actuator API that lets it connect to an external controller in the user's favorite language.
I also think center of mass used to be in there in some dialog or another..
CM for a body or assembly should be a pivot point oriented with the principal axes of the moment of inertia tensor.
The program keeps track of materials and can already do volume integration so the work is basically done and this would be hugely useful.
One thing that would be nice is the ability to add an object and specify its center of mass, mass, and moments of inertia (I might want to put in a motor, battery, board, etc, but I either don't know or don't want to bother with modeling the internal details).
Wow there I am under my old account (samenor) asking for it too in 2013 😕
Total mass is there. If you can do that then (I presume) there is already something quickly integrating over the volume. If there is integration over the volume then finding the center of mass is just a matter of integrating the mass density in each small volume (already being integrated) times the coordinates and then dividing by total integrated mass.
Moments of inertia aren't much harder. Surely somewhere there is an intern who has just taken calc 1/2 who could build this as a summer project.
Inertia terms, and inserting custom coordinate systems to reference those inertia terms are necessary for any robotic\mechatronic systems. I'd love to use Fusion for my real work, but until those features exist it doesn't make sense to use Fusion.
I see mass properties exist, but I don't see where inertia terms can be found?
I am a bit confused by "Solution Provided" Still do not see center of mass/gravity in latest Fusion. Lots of simulations that should require it to be computed. Am I missing something? Simpy providing mass for a single body is not good enough for our purposes. We need center of mass for an assembly.
[Edit] I guess I am not missing anything. I posted my comment and more comments appeared in the thread that say the same thing.
Mass is there but there is no center of mass let alone higher moments of inertia.
The most infuriating thing there is that getting the mass means that F360 has to be doing the integration to get volumes and CM is just weighting coordinates by that and dividing by the total mass (with higher moments being similarly trivial)
@roambotics_scott Thanks for verifying. We noticed in Simulation if you look under Loads there is a Gravity value listed in the tree. We played around with one of our assemblies and it does seem to move when we move parts around. If you right click on Gravity you can get a Property listing. And... it has nothing useful. So it all seems to be there, just not properly implemented. Can you verify on your end? Thanks!
That's just the force of gravity applied in simulations (incidentally AD - might be useful to have a handful of other values in there for places like Mars.. though if you're going there you're probably much more concerned with acceleration / vibrations during launch, reentry, and landing than any static forces on the ground)
Yep. Just looked like the point where the little yellow vecotr marker was resolving (which does move with parts/masses being moved) could have been center of gravity/mass since we are dealing in (theoretically) rigid bodies. And we really just want the location of the point where that pretty little yellow vector marker is pointing on the screen. Thanks for checking! Yes, let's have AD fix the static properties for Earth G before we start asking for Mars use cases and/or dynamics.
