CoppeliaSim forums

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

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

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