How many servos can the ServoStation drive?
There is no substitute for testing; if in doubt, do the experiment. It depends on how much current they draw, and how large a margin of safety you want. A design that attempts to cater for the simultaneous stalling of all servos will be so heavy that it probably won’t fly. On the other hand, a design that presumes only one servo will move at any given time won’t be flying for long. Servo manufacturers tend to be very coy about revealing how much current their servos actually draw. Volz are to be commended as one of the few manufacturers that provide adequate performance data. For example, a Volz DA 20-06-2505 can draw up to 0.6 Amps continuously or 0.9 Amps for short periods of time. A ServoStation can therefore drive 8 x Volz DA 20-06-2505 servos comfortably (a total of 4.8 Amps if all 8 servos are operating continuously), leaving 200mA to spare for the receiver.
