83871111

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Snap Action, Limit Switches

Snap action, limit switches are a type of electromechanical switch that comes in two varieties: polarised or non-polarised. Both versions allow electrical signals to be sent and received through it, either by turning it on or off. It is the most basic type of switch and is used in a variety of appliances, tools and equipment. A limit switch is used in a wide range of applications, such as in motor controls, relays, timers and thermostats.

83871111 Application Field

This type of switch is commonly used in automated machinery and equipment, as it can detect changes in position or velocity. It can open and close depending on the presence or absence of certain signals, such as a voltage or current. It is often used to trigger alarms and actuate pneumatic actuators.

Limit switches have been used in critical industrial applications including remote sensing, fire alarm systems and emergency shutdown systems. Some of the most common applications include open/close cycle time monitoring, equipment operation monitoring, emergency shut off and over-temperature protection.

They are also commonly found in robotics, where it is used to restrict a robot\'s range of motion. For example, a limit switch in a robot arm can be used to detect when the arm has reached the end of its reach, or when it has exceeded a certain speed or angle of rotation.

83871111 Working Principle

The working principle of snap action limit switches is based on the "snap-action" of the contacts. This action occurs when the contacts are rapidly switched from the open position to the closed position. The contacts on the switch are designed to close quickly when an electric current is applied. This rapid switching action causes vibrations which can be felt and heard, hence the name "snap action".

The basic construction of a limit switch consists of a head, contact arm, mounting base and contact arm. The contact arm is attached to the switch\'s base and connected to a contact arm. The contact arm can either be a normally open or normally closed option depending on the operation of the switch. When a current is applied, the contact arm moves up or down. This movement causes the contact arm to touch the metal contacts in the switch, which then closes the contacts and triggers the switch.

The contacts can be made of materials such as metal, plastic or ceramic, depending on the application. Each type of contact material has different electrical characteristics. This can be beneficial for applications with high vibration or temperature levels. The contacts may also be gold-plated for improved reliability.

A limit switch can be combined with other components such as relays and timers for more complicated operations. It can be used in place of traditional switches, which may be expensive and less reliable in specific applications. This type of switch is also becoming more popular in the electronics industry, as it is simple to set up and can be reliable enough for various applications.

In conclusion, snap action limit switches are widely used in industrial applications, such as motor controls, relays, timers and thermostats, as well as robotics, fire alarm systems and emergency shutdown systems. They are also becoming increasingly popular in the electronics industry, due to their relatively simple installation, reliable operation and cost-effectiveness.

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