7.ELECTROMAGNETIC CONTROL SYSTEMS

An electromagnetic control systems activates the various parts of a machine, at the rightmoment and for the rigth amount of time, ensuring that the machine funtions properly.

7.1 Cam switch controller

The device on the side of the pulley in the picture above is called a cam. The shape of this deviceallows us to control the moment and duration of an activity, such as the running or the motor or the illumination of a ligth bulb.

7.2 Limit switches

The picture below shows an electrical control system for a water tank. The battery provides power for the pump, which moves water from the lower tank to the upper tank. When the upper tank is full, a limit switch turns off the pump.