A Master Writer wich gives the time to a Slave Receiver

AWOL: And when operating, is it loaded?

No, it isn't at the moment.

yes, both of them from the regulator of the master board.

Are you saying that you are powering two servos from one board’s regulator?

AWOL:

yes, both of them from the regulator of the master board.

Are you saying that you are powering two servos from one board's regulator?

yes

I think the problem is because the Servo.h library needs the usb cable always connected. Is my assumption correct? If the two boards are both connected, the system works. Is there any other possibility to attuate the servos?

I think the problem is because the Servo.h library needs the usb cable always connected. Is my assumption correct?

No.