I want to synchronize 4 Dynamixels and control them to perform the same task.
It seems that I can only control one motor using one u2d2 and Dynamixel Wizard. Is there a way to control 4 motors simultaneously with one board?
DYNAMIXEL Wizard is intended for use as a configuration and testing application to configure your DYNAMIXEL servos.
In order to control your synchronized servos for your application, you should look into the DYNAMIXEL SDK as a solution to write your custom control application.