in inventor 2013 simulation what is the way to test a fabrication for counter balanced weight stability?
if you see the enclosed rough assembly. I have been playing with variouse stuff and not getting the results i want.
the idea is to work out how much weight the arm will hold without tipping over. and then by increasing the base size and weight or arm length i can then work out the ultimate design for my needs.
the way i want it to work is so that the base is just sitting on the floor as in real life with gravity and weight keeping it there and then as i apply weight to the arm see the tipping or load effect.
this upload is simple and i constrained the base via an axis on the edge put as soon as i run the symulation it just tips over and it shouldnt?
I have tried many other things but get a variety of results like the base suddely flying off and a thousand miles an hout due to the contacts used ?
any help on the best way to do this type of set up?
I might have my software mixed up (Mech Sim vs Inventor Sim), but I would think "soft-springs on the base corners. As soon as you get a negitive result on a spring it's begining to lift up and tip over.
I think I would use Spatial and 3D Contact rather than Revolution or Cylindrical joints.
I guess that as soon as the CG moves beyond the edge of the base it should become unstable and start to tip over.
using spatial can have funney effects on a test like this, like the base entering the floor, or the assembly suddenly flying off.
I have played with settings to adjust this but it should be simpler.
I think the key will be to get to correct properties for the 3D Contact.
It looked to me like your direction of Gravity was backwards.
For the Cylindrical joint to act appropriately (if even possible) I think you will need to edit the Joint Torque Properties.
Similar problems have come up here in the past (perhaps by you?), but I don't recall the solution. Perhaps a search would turn up discussion the "Desker".
Yes sorry i did have the gravity the wrong way! this is just a quick test file that i could upload.
and yes the similer problem has come up posted by me, but this time i thought by uploading a simple assembly it might provoke a simple method by somone.
there must be a simple good solution as anyone that fabricates stuff usining inventor will want to run tests like this on the potential work.
Is this a static item, where the unit is not moving, if so then there is not a stability triangle required for unit. As soon as the C/G moves beyond an edge or hinge point the unit will tip. If this is a dynamic unit that is in motion as the C/G moves outside of the stability triangle then the unit will become unstable and tip.
Might be a bad time to ask questions like this.
There seems to be reduced participation here by the Deskers between AU and Christmas.
Maybe try over here http://beta.autodesk.com
bump this thread after the new year if they don't come along and respond before then.
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