So I have this code to test out each motors individually using the Serial Monitor. I have three motors that can accelerate up to 160 "throttle", where the max is 180 in my code. I have no idea how the throttle is determined in my peace of code. I can sort of understand it. But I don't want to assume. But anyway, one of the motors can only go up to a throttle of 100, and then it shakes, immensely. Now I've crashed my drone once before with these motors using the Naze32 board. So.. I'm thinking it was something to do with that. But how do I logically determine if it is the motor or the esc that is causing one of the motors to only go up to a certain 1/60Hz.
Might help if we could see "this code". 
Are you testing with the propellers attached?
Are the propellers all balanced?
HowToPostCode
ESCs don't often do that but motors that have been crashed and might have a loose magnet or a bent shaft often do.
Anyway to see if it's an ESC or motor problem just swap the bad motor and another one over and see if the problem stays with the motor or ESC.
Steve
slipstick:
ESCs don't often do that but motors that have been crashed and might have a loose magnet or a bent shaft often do.Anyway to see if it's an ESC or motor problem just swap the bad motor and another one over and see if the problem stays with the motor or ESC.
Steve
Right on... I'm going to do that right now.
If you find that it is the motor and have to buy a replacement, don't buy just one.
You crashed. A motor broke.
What are the chances you will crash again?
If you fly like me, that probability approaches 100% pretty darn fast.