Actuator Control via a Serial Monitor - Issue

no, but what do you expect? a delay of zero means no delay

if you want to turn something on for a limited period of time shouldn't you turn it on, delay and then turn it off?

    // turn on for 100 msec
    analogWrite (PWMPinA1, Speed);
    delay (100);
    analogWrite (PWMPinA1, 0);