Joint disassemble after changing Dynamics engine

[horsefacelee]

The joints of my robot works fine in Newton and vortex, but disassemble under bullet and ODE, any reason for that?

[horsefacelee]

I think I solve the problem, it is probably because the ratio between mass and inertia is too large for these dynamic engines.

[coppelia]

Yes, this is very probably the reason. Make sure to always keep an eye on the design considerations listed here (very useful for simulations involving a physics engine).

Cheers