PWM voltage control

[baronep]

PWM doesn't actually change the voltage directly. It is just a signal to communicate with the motor controllers (Victors/Jags). Here is in explanation of how PWM works...http://en.wikipedia.org/wiki/Pulse-width_modulation

[EricVanWyk]

For a jaguar, a good first pass approximation is "applied voltage = battery voltage * signal (scaled 0..1).

A Victor is similar 0 and 1, but applies a larger effective voltage than expected in between.

For both, don't forget about the resistances involved.