I have a wind turbine with a platform and a tail. Both can rotate, but when the platforms turns to the right the tail turns up to the left and vice-versa. I have an angle mate to both the platform and the tail that I unsuppress when I want the parts to rotate and suppress when I want them fix. I want to do the same when I turn them to the right or left, but it won't let me, I get a mate error saying "This mate is over defining the assembly. My question is how can I add more angle mates so I can get one part to stay facing the right and the other one facing the left. I have attached the assembly; if anyone can help me I will greatly appreciated, thank you.
David is right, but in your case you do not need new mates, see attached. Just go to the configuration manager and switch between left and right. I configured the angle dimensions (zero for Right, 180 for Left).