Unofficial Response to "Power Expander problems, please help!"

@Hogzilla

You are burning out the Power Expanders’ PTC. This PTC trips after too much power is pushed through it too fast. You have a total of 3 PTCs on your bot right now, 2 on the cortex (ports 1-5, and 6-10 respectively) and 1 on the power expander.

What you need to do is spread out the load on all of your PTCs, instead of just forcing 1 to take the whole load of your drive at once. put 2 motors on the power expander (Preferably 1 from the left drive and 1 from the right, but if you want to save ports with a y-cable do it.) put 2 of the motors on ports 2-5 on the cortex, and 2 motors on ports 6-9 on the cortex. This way if you are using your full drive you are only putting a fraction of that power through any PTC at once.

@Hogzilla

Check my reply on another thread of how our girls solved this problem

https://vexforum.com/t/393-motors-cutting-out/52115/1