Let me rephrase what I said in my original post. I actually will be using a micro-controller. But not to generate the signal. The controller will be used to select which 555 timer output I want, either the 1ms or 2ms PW. The output of the 2 555's will be fed into a multiplexer, the select pin of the multiplexer will be connected to the controller, this controller will select which PW will be at the output of the multiplexer by either sending a 1 or a 0 to the select pin. So the controller will do the switching.
The 7.8 ms low is not what I am aiming for here. The end result that I want is one signal from one 555 timer to have a period of 20ms, with high time of 1ms. The other 555 timer should have the same period, but 2ms high time. Then like I said they will be fed into a multiplexer. Then I will switch between these signals to move the servo motor wither full left or full right.
With that said, does it clarify to you guys what I'm trying to do? And is there any problems with using this approach?