Smoothing out my MM and MMM

[Big House]

I made an observation the other day. i finally got one of my other models back together and I have an Associated Brushed speed control in it. At the slightest application of throttle input the car moves as smooth as silk.

Now in contrast, I have 2 MM and 1 MMM and as powerful as they are and as reliable as they are, why can they be as smooth as the assoicated comtroller. Mind you I am not getting rid of any of them, but I would just like some insight into this little issue.

[BrianG]

Brushed ESCs don't get any motor feedback to know where the rotor is; they just "blindly" apply power to the motor and the motor takes care of commutation.

Sensorless brushless systems have to spin at a certain RPM so that the unused coil can generate a high and consistent enough back-EMF signal so the ESC knows which coil to fire. Depending on gearing and ESC settings, this can result in a rather abrupt start. You can minimize this by lowering the neutral deadband (in the ESC), gearing down, etc. Be aware that lowering the neutral deadband too much can cause the ESC to try to move forward or back a tiny bit if the throttle pot is not perfectly centered on neutral every time.

Sensored brushless systems are about as close to the smoothness of a brushed system as you are going to get because they use extra sensors on the motor to tell the ESC which coil to fire.