if the green rod is rigid im not sure if this is possible due to the changing distance as the wheels rotate? but if not just use a constraint (track to/damped track) pointing at the other ball from the parented ball?
#Advice
dull glen
dire summit
thx i will try
dire summit
i have changed it a bit i 2 wheels both with arms one wheel spinning clockwise the other anti-clockwise, i have shown with blue spheres where the bones rotate the middle joint between the two arms in green is where the 2 sides will connect influencing each-other i have 2 armature setups, hoping this can be done with rigs
dull glen
probably. try it and see what happens.
your question is to general to provide any support
try it, if it fails, show us the problem and we can try troubleshoot
dire summit
that's the blender file that i made , ive tried to make the joint between the 2 arms connect cannot find any constraints which would help me achieve this