ELECTROMAGNETIC CONTROL SYSTEM
An electromagnetic control system activates the various parts of a machine, at the right moment and for the right amount of time, ensuring that the machine functions properly.
Electromagnetic control systems often use cams and limit switches.

CAM SWITCH CONTROLLER
A camshaft is a cylindrical device with protrusions that make contact with other devices in order to activate or desactivate them.
The shape of a cam allows us to  control the moment and duration of an activity, such us the running of a motor or the illumination of a light bulb.

LIMIT SWITCHES
A limit switch detects when preassure is being applied to it. There are two types of limit switch: NORMALLY CLOSED (N/C) and NORMALLY OPENED (N/O)