Limit Contact Pdf For Free

A limit switch in a crane is a device that is used to detect the position of the crane's load or the crane's boom.

The switch is mounted on the hoist gearbox and the drum gear turns the switch. The limit switch is a rotary cam type and is equipped with 4 micro-switches where each of these micro-switches has a specific function.

Most EOT limit switches, such as rotary limit switches, gravity limit switches, and lever type limit switches, are often used in factories and other industrial cranes like Hoists machinery, Overhead Cranes, Electrical Hoists, Jib Cranes, Single Girder EOT Cranes, Double Girder EOT Cranes, RTG Cranes, Traverser Cranes, ...

Different types of Limit Switches for EOT Cranes Rotary limit switches. Lever type limit switches. Gravity limit switch.

Limit switch definition is an electromechanical switch that operates by any physical force or the movement of a machine. These switches are very helpful in detecting the absence or presence of an object, counting, detecting speed, detecting movement range, travel limit, positioning, etc.

In most cases, a limit switch begins operating when a moving machine or a moving component of a machine makes contact with an actuator or operating lever that activates the switch. The limit switch then regulates the electrical circuit that controls the machine and its moving parts.

When the limit switch is actuated the closed contacts are opened or forced open if a contact weld occurs. These contacts are typically referred to as ?normally closed? contacts. In negative mode, the switch contact(s) are closed when the limit switch is actuated.