I'd like to assemble a prototype of brushless servo system using a RC brushless motor (heavily geared down), a sensored Electronic Speed Controller for RC motors, and a microcontroller to do the PID control.
I'd add three Hall sensors around the motor, and feed those signals into the ESC and the microcontroller. The MCU will run a PID controller, and output an RC servo compatible PWM signal to the ESC.
Question: Is this likely to work, or will I find that the ESC is trying to be clever? I have one RC car which only switches into reverse if you double pulse the reverse signal.
(Note, the reason I'm trying to get this working using an off-the-shelf ESC, rather than designing my own proper one is that development time is much more expensive than parts cost at the moment).